Article: 94614 of rec.radio.amateur.homebrew From: nospam@nouce.bellatlantic.net Subject: Re: Shunt feedback in broadband RF amps Message-ID: References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> Date: Wed, 19 Oct 2005 15:45:28 GMT On 18 Oct 2005 22:58:55 -0700, meara.london@virgin.net wrote: >I'm having trouble understanding how the typical shunt feedback >networks used in RF (solid state) amps work. I'm looking at the 1993 >ARRL Handbook. Typical common base broadband amp. For the shunt >feedback (from collector to base) they have two resistors: 560 ohms in >series with 3300 ohms. The 3300 ohm is bypassed by a .01 uf cap. > >So far so good. But then the text explains that because you have >rising gain characteristics when the frequency drops you need something >to reduce gain at lower frequencies. That's why the negative feedback >helps. > >Here's where I'm having trouble: "As the operating frequency is >decreased the negative feedback increases becasue the network feedback >reactance becomes lower." Huh? Wouldn't that network's reactance >INCREASE as frequency is lowered? The only part of it with reactance >is the .01 cap, correct? In the 1994 RAH the same reference is in section 4 figure 53C. There are TWO feedback networks. One in the emitter circuit and the Collector Base feedback. Ther is also the transformer that will limit low frequecy response as a secondary action which also limits Collector feedback as well. However, they are refering to the RC pair found on the leg of the emitter. For that case the statement would be correct. Typically those amps (unless higher power) the emitter has a bias resistor. That resistor is bypassed with a RC of .1 or .01uF and series R of a few ohms (typically less than 20 ohms). That C is fairly small for low RF and audio to effectively bypass the emitter circuit. so at say DC and audio the Emitter resistance is 110ohms. At some greater frequency the capacitor looks like a very low reactance and the emitter resistance is effectively 10 ohms at RF. That emitter network allows setting DCbias (operating point) and also the AC feedback at the Emitter Base leg. Since the capacitor has greater reactance at low frequencies the feedback is greater. The RAH has only a very terse description and lacks design detail. If you look at Solid State Design for the Radio Amateur (ARRL press) and/or Exprimental Methods in RF Design (ARRL press) you will have a far more detailed explanation of how that amplifier works and how to calculate values for design. Hope that helps. Allison Article: 94615 of rec.radio.amateur.homebrew From: nospam@nouce.bellatlantic.net Subject: Re: best material for turning a closet into a Faraday cage Message-ID: <5jqcl199rs3otbsmr99gtp5d71ikk232un@4ax.com> References: <1129698816.759523.298440@g43g2000cwa.googlegroups.com> Date: Wed, 19 Oct 2005 15:53:54 GMT On 18 Oct 2005 22:13:36 -0700, eternalsquire@comcast.net wrote: >All, > >I have the opportunity to turn a walk-in closet with door into a ham >station. I'm thinking of turning the closet into a Faraday cage to >help in reducing common-mode QRM. To this this, I will need to line >the entire inside of the closet, including the door, with some type of >metal, and then connect that metal to my ground system. > >Question is this: what type of metal would provide acceptable results: >aluminum foil, copper foil, or tin-plated zinc sheets nailed >overlapping along the closet inside? > >Thanks in advance, > >The Eternal Squire There are very few good reassons for doing this. There are also considerations such as any thing that comes in must be bypassed and filtered (I really mean everthing) so that none of the offending signals arrive. AC power is the hardest to filter. The best material and common most one is Copper screening. Note ALL joints must be soldered or otherwise have a non corroding and solid joint. The door also must have a 100% contact joint all the way around (bottom too). The door will usually have phosphor bronze allow fingers to allow contact around the periphery. What your attempting to make is a box that has no openings that are significant till you reach the microwave range. Why is common mode QRM a big problem? Allison Article: 94616 of rec.radio.amateur.homebrew From: "Graham W" References: <3B74f.437160$x96.227112@attbi_s72> <4354FDA4.196B67C2@earthlink.net> <43555560.1FB470CD@earthlink.net> <4355A812.CB7B0BEB@earthlink.net> Subject: Re: Choice of iron powder toriod? Date: Wed, 19 Oct 2005 16:36:07 +0100 Message-ID: <43567bcb$0$15079$ed2619ec@ptn-nntp-reader02.plus.net> Michael A. Terrell wrote: > Joerg wrote: >> >> Hello Michael, >> >>> There is no reason to apologize for being good with analog. ;-) I >>> worked as a broadcast engineer during the time they announced the >>> first memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM >>> with very critical timing. I also did analog and digital work on >>> the microwave equipment built at Microdyne, before L3-Com closed >>> the Ocala plant. >>> >> >> Seems you started with digital stuff a year or two earlier than I >> did. My first RAM had a whopping 1024 bits. Not bytes, bits. >> 21...something, I could look it up since the device where its in >> still works. > > 2114? 1K * 4 bits? Nah - 2102 1k * 1. Had 8 of 'em in in my homebuilt Nascom 1 computer which with a 2708 UVEPROM for the 'monitor' was all the RAM for system and user code and video store! Nevertheless, it was sufficient for a machine code program to run 'Lunar Lander', hee hee. Collins filters were regarded as the bees knees in UK ham circles but I never could afford one! 73 de G3VPC -- Graham W http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial WIMBORNE http://www.wessex-astro-society.freeserve.co.uk/ Wessex Dorset UK Astro Society's Web pages, Info, Meeting Dates, Sites & Maps Change 'news' to 'sewn' in my Reply address to avoid my spam filter. Article: 94617 of rec.radio.amateur.homebrew From: Joerg Subject: Re: Choice of iron powder toriod? References: <3B74f.437160$x96.227112@attbi_s72> <4354FDA4.196B67C2@earthlink.net> <3F95f.2019$dO2.694@newssvr29.news.prodigy.net> Message-ID: Date: Wed, 19 Oct 2005 17:10:59 GMT Hello Tim, >>Then again a SW engineer once told me that nothing is truly analog. >>There is always that smallest digital step, the quantum. > > So, digital is base two, and analog is base 1.6 x 10^19? ;-) > Still, the digital guys kept telling us "Some day we'll get there and then you are going to be extinct". I am not worried at all... Regards, Joerg http://www.analogconsultants.com Article: 94618 of rec.radio.amateur.homebrew Message-ID: <43568483.CCBB8C37@hotmail.com> Date: Wed, 19 Oct 2005 18:38:11 +0100 From: Pooh Bear Subject: Re: Choice of iron powder toriod? References: <3B74f.437160$x96.227112@attbi_s72> <4354FDA4.196B67C2@earthlink.net> <3F95f.2019$dO2.694@newssvr29.news.prodigy.net> Joerg wrote: > Still, the digital guys kept telling us "Some day we'll get there > ........ How long have they been saying that ???? ;-) Graham Article: 94619 of rec.radio.amateur.homebrew From: Keith Williams Subject: Re: Choice of iron powder toriod? Date: Wed, 19 Oct 2005 13:55:30 -0400 Message-ID: References: <3B74f.437160$x96.227112@attbi_s72> <4354FDA4.196B67C2@earthlink.net> <3F95f.2019$dO2.694@newssvr29.news.prodigy.net> <43568483.CCBB8C37@hotmail.com> In article <43568483.CCBB8C37@hotmail.com>, rabbitsfriendsandrelations@hotmail.com says... > > > Joerg wrote: > > > Still, the digital guys kept telling us "Some day we'll get there > > ........ > > How long have they been saying that ???? ;-) We've been getting half the way there every two years or so. ;-) -- Keith Article: 94620 of rec.radio.amateur.homebrew From: Roy Lewallen Subject: Re: best material for turning a closet into a Faraday cage Date: Wed, 19 Oct 2005 10:58:27 -0700 Message-ID: <11ld2a4t4aasme3@corp.supernews.com> References: <1129698816.759523.298440@g43g2000cwa.googlegroups.com> <5eudnZw4Qo8m-MvenZ2dnUVZ_smdnZ2d@adelphia.com> A Faraday cage is an electrostatic shield, not a shield for electromagnetic fields(*). There would be no advantage to shielding your equipment from external electrostatic fields. Shielding your station from electromagnetic fields probably won't solve any perceived problems, either, and is a much more difficult job. As others have pointed out, it's often much more difficult to prevent energy from getting through the shield via power and other conductors and through seams and door fittings than it is to make the shield itself. If you don't pay proper attention to the sneak paths where energy can get in, you're wasting your time making the shield in the first place. (*) I found "Faraday cage" in the index of only one of a half dozen electromagnetics texts. It's not in Terman's _Radio Engineering_ or the rather old IEEE dictionary I have, either. Roy Lewallen, W7EL Article: 94621 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: Shunt feedback in broadband RF amps Date: Wed, 19 Oct 2005 13:16:45 -0500 Message-ID: References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> wrote in message news:1129701535.404399.192870@f14g2000cwb.googlegroups.com... > I'm having trouble understanding how the typical shunt feedback > networks used in RF (solid state) amps work. I'm looking at the 1993 > ARRL Handbook. Typical common base broadband amp. For the shunt > feedback (from collector to base) they have two resistors: 560 ohms in > series with 3300 ohms. The 3300 ohm is bypassed by a .01 uf cap. > > So far so good. But then the text explains that because you have > rising gain characteristics when the frequency drops you need something > to reduce gain at lower frequencies. That's why the negative feedback > helps. > > Here's where I'm having trouble: "As the operating frequency is > decreased the negative feedback increases becasue the network feedback > reactance becomes lower." Huh? Wouldn't that network's reactance > INCREASE as frequency is lowered? The only part of it with reactance > is the .01 cap, correct? > > Help! 73! > > Bill M0HBR N2CQR CU2JL > http://www.qsl.net/n2cqr > In the 70's I worked on 150 MHz PA's and we used what we called a "banana". It was called that because once one got fried and afterward it looked like a cooked banana. It was a orange drop (dipped) cap (I think mylar), value forgotten - somewhere in the .001 - .01 range, with two 1/4 watt resistors in series, one at each end that held it up over the power transistor. Though I don't remember if they were ever measured, the rationale was that these caps had considerable inductance at 150 MHz. and were thus an "open" there. Down in the 1-20 MHz range, where the regen (regeneration - oscillation) occurred, they were a "short". Also remember that the transistor impedances are in the .1-1 ohm range for power devices. I think we also may have put small, 50 ohm, beads on the resistor leads. If the bead exploded, you knew you hadn't sloved the regen problem because there was considerable energy at the regen frequency. and thay became good loads. For regen there are the "dancing faintlies" and the "christmas tree" types. (:-) Forget not those parasitics in the components. 73, Steve, K,9.D;C'i Article: 94622 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: best material for turning a closet into a Faraday cage Date: Wed, 19 Oct 2005 12:59:49 -0500 Message-ID: References: <1129698816.759523.298440@g43g2000cwa.googlegroups.com> <5eudnZw4Qo8m-MvenZ2dnUVZ_smdnZ2d@adelphia.com> "John Popelish" wrote in message news:5eudnZw4Qo8m-MvenZ2dnUVZ_smdnZ2d@adelphia.com... > eternalsquire@comcast.net wrote: > > All, > > > > I have the opportunity to turn a walk-in closet with door into a ham > > station. ... > > Question is this: what type of metal would provide acceptable results: > > aluminum foil, copper foil, or tin-plated zinc sheets nailed > > overlapping along the closet inside? > > > > Thanks in advance, > > > > The Eternal Squire > > Just as important as the conductivity and thickness of the shield is > the continuity. Nonconducting seams can act as slot antennas. So > aluminum, though it is a very good conductor, is very difficult to > seam in a conductive way. Well connected, galvanized chicken wire > (with 1 inch or so holes) may work as well as aluminum foil that has > non conductive seams, as long as the holes are much smaller than the > shortest wavelengths you are trying to shield. Lungren screen rooms use a copper screen which is just like screen door. However, they are rated up into the GHz range. You'll also need some type of "finger stock" around the door to provide an electrical seal. The Lungren screen rooms have a brass-like finger stock all around the door. The grounds _ALL_ go to one single point and only one single point However... I'm not sure what this buys you for a ham shack...unless you want to do receiver design and testing and need the quiet, RF free environment. Connecting the antenna eliminates all your work, so to speak. 73, Steve, K,9.D;C'I Article: 94623 of rec.radio.amateur.homebrew From: nospam@nouce.bellatlantic.net Subject: Re: best material for turning a closet into a Faraday cage Message-ID: References: <1129698816.759523.298440@g43g2000cwa.googlegroups.com> <5jqcl199rs3otbsmr99gtp5d71ikk232un@4ax.com> <1129741071.224786.127220@g49g2000cwa.googlegroups.com> Date: Wed, 19 Oct 2005 19:15:18 GMT On 19 Oct 2005 09:57:51 -0700, eternalsquire@comcast.net wrote: >Out here in the this trailer park, we have both dirty power coming from >the AC, and air-conditioning motors from a whole bunch of trailers. >These are problems that cannot be fixed, so I would rather use >defensive techniques such as a Faraday cage Won't work. Most of the noise is radiated and the point of interaction is the antenna not the power cord for the most part. If the power source really is dirty try running on isolated battery or from the mobile rig in the car. IF you hear it there then you need to get away from the area. FYI: the motors used for air conditioning and refigeration are least likely noise sources. Most are capcitor start induction types, arcing or other raditional likely sources are not common to them. Electonics such as TVs, Computers, Electronic Games, Lamp dimmers and touch switches are your enemies. Allison Article: 94624 of rec.radio.amateur.homebrew From: nospam@nouce.bellatlantic.net Subject: Re: Shunt feedback in broadband RF amps Message-ID: References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> Date: Wed, 19 Oct 2005 19:19:52 GMT On Wed, 19 Oct 2005 13:16:45 -0500, "Steve Nosko" wrote: > > wrote in message >news:1129701535.404399.192870@f14g2000cwb.googlegroups.com... >> I'm having trouble understanding how the typical shunt feedback >> networks used in RF (solid state) amps work. I'm looking at the 1993 >> ARRL Handbook. Typical common base broadband amp. For the shunt >> feedback (from collector to base) they have two resistors: 560 ohms in >> series with 3300 ohms. The 3300 ohm is bypassed by a .01 uf cap. >> >> So far so good. But then the text explains that because you have >> rising gain characteristics when the frequency drops you need something >> to reduce gain at lower frequencies. That's why the negative feedback >> helps. >> >> Here's where I'm having trouble: "As the operating frequency is >> decreased the negative feedback increases becasue the network feedback >> reactance becomes lower." Huh? Wouldn't that network's reactance >> INCREASE as frequency is lowered? The only part of it with reactance >> is the .01 cap, correct? >> >> Help! 73! >> >> Bill M0HBR N2CQR CU2JL >> http://www.qsl.net/n2cqr >> > > In the 70's I worked on 150 MHz PA's and we used what we called a >"banana". It was called that because once one got fried and afterward it >looked like a cooked banana. It was a orange drop (dipped) cap (I think >mylar), value forgotten - somewhere in the .001 - .01 range, with two 1/4 >watt resistors in series, one at each end that held it up over the power >transistor. > Though I don't remember if they were ever measured, the rationale was >that these caps had considerable inductance at 150 MHz. and were thus an >"open" there. Down in the 1-20 MHz range, where the regen (regeneration - >oscillation) occurred, they were a "short". Also remember that the >transistor impedances are in the .1-1 ohm range for power devices. I think >we also may have put small, 50 ohm, beads on the resistor leads. If the >bead exploded, you knew you hadn't sloved the regen problem because there >was considerable energy at the regen frequency. and thay became good loads. > >For regen there are the "dancing faintlies" and the "christmas tree" types. >(:-) > >Forget not those parasitics in the components. >73, Steve, K,9.D;C'i Having tamed a few solid state power amps I can appreciate that. However this is not a similar case. The amplifier in question is of the lower power (under 50mW) type commonly used for wide band amplifiers and/or RF amps at low levels. The question really stems from a far too brief description of said amp in the handbook. Allison KB1GMX Article: 94625 of rec.radio.amateur.homebrew From: nospam@nouce.bellatlantic.net Subject: Re: Shunt feedback in broadband RF amps Message-ID: <8r2fl15fq0jsoof2ohcnjau1c89l3tsp56@4ax.com> References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> <1129786143.687991.27160@z14g2000cwz.googlegroups.com> Date: Thu, 20 Oct 2005 12:45:04 GMT On 19 Oct 2005 22:29:03 -0700, meara.london@virgin.net wrote: >Allison: Thanks. > >Obviously you are right. But I see the same kind of confusing language >in other editions of the handbook. In the 1980 edition (otherwise one >of my favorites) they have (pg 6-19) a collector-base feedback network >with just a cap and a resistor in series. Text reads: "C1 and R3 >provide negative feedback which increases progressively as the >frequency is lowered." It calls for a cap of values between 220 pf and >.00015 for hf band amps, IN SERIES with a resistor of from 51 to 5600 >ohms. > >Is this just a case of some confusing language that has kind of worked >its way in the handbook DNA and is passed down from generation to >generation? Or is there really something about these cap and resistor >in series networks that cause them to increase the amount of feedback >as freq drops? > >73 Bill M0HBR N2CQR CU2JL >http://www.qsl.net/n2cqr That reference is definately an error. The only way that would be expected to occur is when the C is sufficiently large enough to be useful at lower frequencies. Often enough it was. Amplifiers of that type and time use transistors of say FT 150mhz and a betacutoff of 1 to 3 mhz. What happen is as you go up in frequency from 1 to say 30 mhz the effective AC beta goes from about 100 down to 5. The amplifier gain also has that same downward curve. It's that rising gain when progressing down in frequency your working against with the described network. So when that allowed for and the series C and R it's is possible to say that as the feedback increases as the gain increases. Even then without putting boundaries on the values and using a real (working) circuit it's not a good explanation and borders on error. The "yabut" of amplifiers (that one being a class C poweramp) is that EVERYthing around the transistor interacts due to the low impedences and high currents. So by observation that circuit may actually work somewhat as described but likely there are onter factors at work that are not well explained there. Examples of this (same circuit P6-19) that can cause grief. The bypass on the collector circuit needs to be effective at audio through RF and yet the schematic only shows one cap. The likely circuit when built would not be stable. I think again that explanations suffers from trying to be too brief and leaving out detail. When examined without full context appears to be an error can still have validity. The RAH is a good text, lots of information and relatively few errors. However it's only one source and even they cite other sources for greater detail. Failure to take advantage of those citations and delve deeper can lead to believeing in lore rather than studied consideration. Allison Article: 94626 of rec.radio.amateur.homebrew From: "William E. Sabin" References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> Subject: Re: Shunt feedback in broadband RF amps Message-ID: Date: Thu, 20 Oct 2005 12:47:36 GMT The 1994 ARRL handbook, page 4-23, Fig 53C shows the feedback amplifier that you describe. However, it is a common-emitter circuit, not a common-base circuit. The 3300 ohm resistor returns to +12 V DC and provides DC base current for the 2N5109. The 0.01 uF bypass makes the 560 ohm resistor the main source of this feedback at radio frequencies. There are two kinds of feedback in the circuit. One is the 560 ohms in the base circuit. The author calls this "negative feedback". I call this "voltage feedback". This feedback does not change very much over the HF region. The other feedback (he calls it "degenerative feedback") is a 10 ohm resistor in the emitter in series with a 100 resistor which is shunted by 0.01uF. I call this "current feedback". This feedback increases at low radio frequency because the impedance from emitter to ground increases at low radio frequencies. This is the feedback that the text is referring to in the text and it is correct. This kind of feedback increases at low frequency. If the 0.01 uF were replaced by a 1.0 uF this increase in feedback would be a lot less at low radio frequencies. The author, probably DeMaw, got his terminology slightly mixed up but he is referring to the emitter to ground current feedback, not the collector to base voltage feedback. If you have a copy of the 2004 Handbook, chapter 17 has a sidebar discussion of negative feedback that is interesting. Later editions may have deleted it. Bill W0IYH wrote in message news:1129701535.404399.192870@f14g2000cwb.googlegroups.com... > I'm having trouble understanding how the typical shunt feedback > networks used in RF (solid state) amps work. I'm looking at the 1993 > ARRL Handbook. Typical common base broadband amp. For the shunt > feedback (from collector to base) they have two resistors: 560 ohms in > series with 3300 ohms. The 3300 ohm is bypassed by a .01 uf cap. > > So far so good. But then the text explains that because you have > rising gain characteristics when the frequency drops you need something > to reduce gain at lower frequencies. That's why the negative feedback > helps. > > Here's where I'm having trouble: "As the operating frequency is > decreased the negative feedback increases becasue the network feedback > reactance becomes lower." Huh? Wouldn't that network's reactance > INCREASE as frequency is lowered? The only part of it with reactance > is the .01 cap, correct? > > Help! 73! > > Bill M0HBR N2CQR CU2JL > http://www.qsl.net/n2cqr > Article: 94627 of rec.radio.amateur.homebrew From: "Ernie" Subject: Boy's Books Of Radio And Electronics Message-ID: Date: Fri, 21 Oct 2005 01:06:17 GMT Like many of you, I also grew up with Morgan's series. With the help of my Father I built the Geiger Counter (CK1026 Geiger Tube and 3S4), One Tube Amplifier (1H6 tube?), One Transistor Amplifier (CK722) and Crystal Set---I remember our trips back in 1961 to Lafayette Radio And Electronics, 111 Jericho Turnpike, for parts. However, I just can't find myself paying $120 for the First Book and $280 for the Second Book even if they are near fine. Maybe if Lindsay (Lindsay's Technical Books: http://www.lindsaybks.com/ ) would offer reprints I would pay $100 for the complete set (first edition). http://cgi.ebay.com/The-Boys-First-Book-of-Radio-Electronics-Morgan_W0QQitem Z4583217001QQcategoryZ378QQssPageNameZWD1VQQrdZ1QQcmdZViewItem http://cgi.ebay.com/The-Boys-Second-Book-of-Radio-Electronics-Morgan_W0QQite mZ4583217099QQcategoryZ378QQssPageNameZWD1VQQrdZ1QQcmdZViewItem Article: 94628 of rec.radio.amateur.homebrew Subject: THIS ACTUALLY WORKS, IT'S AMAZING - "It_really_works1.txt" 10.6 KBytes yEnc From: SK8@HOTMAIL.COM Date: Fri, 21 Oct 2005 02:25:54 GMT Message-ID: <1129861625_625@spool6-east.superfeed.net> THIS REALLY WORKS this is amazing! give it a try! Turn $6.00 into $42,000...read this to find out how!!! READING THIS COULD CHANGE YOUR LIFE! I found this on a bulletin board and decided to try it. 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BOX 1078 Bronx, NY 10462 6) Freddy Oropeza 10201 Lindley Av, apt# 118. Northridge, CA 91325 STEP 2: Now take the #1 name off the list that you see above, move the other names up (6 becomes 5, 5 becomes 4, etc...) and add YOUR Name as number 6 on the list. STEP 3: Change anything you need to, but try to keep this article as close to original as possible. Now, post your amended article to at least 200 newsgroups. (I think there are close to 24,000 groups) All you need is 200, but remember, the more you post, the more cash you make! This is perfectly legal! If you have any doubts, refer to Title 18 Sec. 1302 & 1341 of the Postal lottery laws. Keep a copy of these steps for yourself and, whenever you need cash, you can use it again, and again. PLEASE REMEMBER that this program remains successful because of the honesty and integrity of the participants and by their carefully adhering to the directions. Look at it this way. If you are of integrity, the program will continue and the cash that so many others have received will come your way. NOTE: You may want to retain every name and address sent to you, either on a computer or hard copy and keep the notes people send you. This VERIFIES that you are truly providing a service. (Also, it might be a good idea to wrap the $1 bill in dark paper to reduce the risk of mail theft.) So, as each post is downloaded and the directions carefully followed, six members will be reimbursed for their participation as a List Developer with one dollar each. Your name will move up the list geometrically so that when your name reaches the #1 position you will be receiving thousands of cash in CASH!!! What an opportunity for only $6.00 ($1.00 for each of the first six people listed above) Send it now, add your own name to the list and you're in business! ---DIRECTIONS ----- FOR HOW TO POST TO NEWSGROUPS------------ Step 1) You do not need to re-type this entire letter to do your own posting. Simply put your cursor at the beginning of this letter and drag your cursor to the bottom of this document, and select 'copy' from the edit menu. This will copy the entire letter into the computer's memory. Step 2) Open a blank 'notepad' file and place your cursor at the top of the blank page. From the 'edit' menu select 'paste'. This will paste a copy of the letter into notepad so that you can add your name to the list. Step 3) Save your new notepad file as a .txt file. If you want to do your postings in different settings, you'll always have this file to go back to. Step 4) Use Netscape or Internet explorer and try searching for various newsgroups (on-line forums, message boards, chat sites, discussions.) Step 5) Visit these message boards and post this article as a new message by highlighting the text of this letter and selecting paste from the edit menu. Fill in the Subject, this will be the header that everyone sees as they scroll through the list of postings in a particular group, click the post message button. You're done with your first one! Congratulations...THAT'S IT! All you have to do is jump to different newsgroups and post away, after you get the hang of it, it will take about 30 seconds for each newsgroup! **REMEMBER, THE MORE NEWSGROUPS YOU POST IN, THE MORE Cash YOU WILL MAKE!! BUT YOU HAVE TO POST A MINIMUM OF 200** That's it! You will begin receiving cash from around the world within days! You may eventually want to rent a P.O.Box due to the large amount of mail you will receive. If you wish to stay anonymous, you can invent a name to use, as long as the postman will deliver it. **JUST MAKE SURE ALL THE ADDRESSES ARE CORRECT.** Now the WHY part: Out of 200 postings, say I receive only 5 replies (a very low example). So then I made $5.00 with my name at #6 on the letter. Now, each of the 5 persons who just sent me $1.00 make the MINIMUM 200 postings, each with my name at #5 and only 5 persons respond to each of the original 5, that is another $25.00 for me, now those 25 each make 200 MINIMUM posts with my name at #4 and only 5 replies each, I will bring in an additional $125.00! Now, those 125 persons turn around and post the MINIMUM 200 with my name at #3 and only receive 5 replies each, I will make an additional $626.00! OK, now here is the fun part, each of those 625 persons post a MINIMUM 200 letters with my name at #2 and they each only receive 5 replies, that just made me $3,125.00!!! Those 3,125 persons will all deliver this message to 200 newsgroups with my name at #1 and if still 5 persons per 200 newsgroups react I will receive $15,625.00! With an original investment of only $6.00! AMAZING! When your name is no longer on the list, you just take the latest posting in the newsgroups, and send out another $6.00 to names on the list, putting your name at number 6 again. And start posting again. The thing to remember is: do you realize that thousands of people all over the world are joining the internet and reading these articles everyday?, JUST LIKE YOU are now!! So, can you afford $6.00 and see if it really works?? I think so... People have said, "what if the plan is played out and no one sends you the cash? So what! What are the chances of that happening when there are tons of new honest users and new honest people who are joining the internet and newsgroups everyday and are willing to give it a try? Estimates are at 20,000 to 50,000 new users, every day, with thousands of those joining the actual internet. 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˜Ą‘œ™ŸšVJ‹˜ŽJ˜ŽJ™ŸžJ‹˜™ž’œJN`XZZJž™J˜‹—74™˜Jž’J–“žVJšŸžž“˜‘JŁ™ŸœJ˜‹—J‹žJ˜Ÿ—ŒœJ`J‹‘‹“˜XJk˜ŽJž‹œžJš™ž“˜‘74‹‘‹“˜XJ~’ Jž’“˜‘Jž™Jœ——ŒœJ“dJŽ™JŁ™ŸJœ‹–“¤Jž’‹žJž’™Ÿ‹˜ŽJ™74š™š–J‹––J™ œJž’JĄ™œ–ŽJ‹œJ”™“˜“˜‘Jž’J“˜žœ˜žJ‹˜ŽJœ‹Ž“˜‘Jž’74‹ œž“–J œŁŽ‹ŁiVJt}~JvsuoJƒyJ‹œJ˜™ĄKKJ}™VJ‹˜JŁ™ŸJ‹™œŽJN`XZZ74‹˜ŽJJ“J“žJœ‹––ŁJĄ™œ•iiJsJž’“˜•J™XXXJz™š–J’‹ J‹“Ž VJLĄ’‹žJ“74ž’Jš–‹˜J“Jš–‹ŁŽJ™ŸžJ‹˜ŽJ˜™J™˜J˜ŽJŁ™ŸJž’J‹’iJ}™JĄ’‹žKJ’‹žJ‹œ74ž’J’‹˜J™Jž’‹žJ’‹šš˜“˜‘JĄ’˜Jž’œJ‹œ Jž™˜J™J˜ĄJ’™˜žJŸœ74‹˜ŽJ˜ĄJ’™˜žJš™š–JĄ’™J‹œJ”™“˜“˜‘Jž’J“˜žœ˜žJ‹˜ŽJ˜Ą‘œ™Ÿš74 œŁŽ‹ŁJ‹˜ŽJ‹œJĄ“––“˜‘Jž™J‘“ J “žJ‹JžœŁiJož“—‹žJ‹œJ‹žJ\ZVZZZJž™74_ZVZZZJ˜ĄJŸœVJ œŁJŽ‹ŁVJĄ“ž’Jž’™Ÿ‹˜ŽJ™Jž’™J”™“˜“˜‘Jž’J‹žŸ‹–74“˜žœ˜žXJ|——Œ œVJš–‹ŁJpks|vƒJ‹˜ŽJryxo}~vƒJ‹˜ŽJž’“JĄ“––Jœ‹––ŁJĄ™œ•X74 =yend size=10552 crc32=db322d6a Article: 94629 of rec.radio.amateur.homebrew From: tim gorman Subject: Re: Shunt feedback in broadband RF amps References: <1129701535.404399.192870@f14g2000cwb.googlegroups.com> Message-ID: Date: Fri, 21 Oct 2005 08:24:05 -0500 meara.london@virgin.net wrote: > > > I'm having trouble understanding how the typical shunt feedback > networks used in RF (solid state) amps work. I'm looking at the 1993 > ARRL Handbook. Typical common base broadband amp. For the shunt > feedback (from collector to base) they have two resistors: 560 ohms in > series with 3300 ohms. The 3300 ohm is bypassed by a .01 uf cap. > > So far so good. But then the text explains that because you have > rising gain characteristics when the frequency drops you need something > to reduce gain at lower frequencies. That's why the negative feedback > helps. > > Here's where I'm having trouble: "As the operating frequency is > decreased the negative feedback increases becasue the network feedback > reactance becomes lower." Huh? Wouldn't that network's reactance > INCREASE as frequency is lowered? The only part of it with reactance > is the .01 cap, correct? > > Help! 73! > > Bill M0HBR N2CQR CU2JL > http://www.qsl.net/n2cqr I think to actually figure this out you will need to write the gain transfer equation for the amplifier. Many of the replies here are talking about an RF amplifier but are analyzing the feedback at DC. Remember that the output of a transistor is NOT in phase with the input. As the base voltage goes UP the collector voltage goes DOWN. (think of a transistor used as a switch - when the base is biased off the no current flows and the collector is at power supply potential - when the switch is biased on then current flows and the collector is driven toward the potential of the emitter -- i.e. the collector voltage goes down) For RF the actual phase difference between input and output is dependent upon the input and output impedances of the transistor as well as the gain transfer characteristic (things like transit times of the current carriers and junctions widths and all sorts of stuff figure in here). *THEN* you have to consider the phase contribution of the RC network in the collector to base network. At some RF frequency the collector is 180deg out of phase with the input so a direct feedback link from the collector to the base would be *negative*. It is quite possible that the phase relationships of this particular amplifier are such that the negative feedback increases as the frequency goes down. You would just have to write the equations and see where they take you. tim ab0wr Article: 94630 of rec.radio.amateur.homebrew Subject: Re: FAQ From: Frank Gilliland Date: Fri, 21 Oct 2005 07:19:59 -0700 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> Gee, why didn't you crosspost this to rrcb? On 21 Oct 2005 07:05:35 -0700, "Polymath" wrote in <1129903535.253354.121770@g47g2000cwa.googlegroups.com>: >What is Ham Radio? > >Ham Radio is a technical pursuit for those who >are interested in the science of radio wave >propagation and who are also interested in the >way that their radios function. It has a long-standing >tradition of providing a source of engineers who >are born naturals. > >Ham Radio awakens in its aficionados a whole-life >fascination with all things technical and gives >an all-abiding curiosity to improve one's scientific >knowledge. It's a great swimming pool, please dive in! > >This excitement causes a wish to share the experience >with ones fellow man, and shows itself in the >gentlemanly traditions of Ham Radio. > >Radio Hams are in a unique privileged position in that >they can construct and operate their own equipment! No-one >else has this privilege. Users, such as broadcasters, >the po lice and armed farces, CBers and mobile phone >users have to purchase ready-made gear. Manufacturers >are not licensed to operate their gear. Radio Hams >are qualified to design, build and then >operate their own pieces of equipment. They do this >with gusto, and also repair and modify their own >equipment. This is a privilege well worth the effort >to gain, and one to be jealously guarded. > >The excitement that drives a Radio Ham starts with >relatively simple technologies at first, perhaps making >his own Wimshurst machine and primary cells. Small pieces >of test equipment follow, possibly multimeters and signal >generators. Then comes receivers and transmitters. It is with >the latter that communication with like-minded technically >motivated people takes off. The scope for technical >development grows with the years >and now encompasses DSP and DDS. There is also a great deal >of excitement in the areas of computer programming to >be learnt and applied. > >The technical excitement motivates Radio Hams to compete >with each other to determine who has designed and manufactured >the best-quality station. This competitiveness is found in DXing, >competitions and fox-hunts. > >-----OOOOO---- > >However, beware! A Ham Radio licence is such a >desirable thing to have that there are large >numbers of people who wish to be thought of >as Radio Hams when, in fact, they are nothing >of the kind! Usually such people are a >variation of the CB Radio hobbyist; they buy their >radios off the shelf and send them back to be >repaired; they are not interested in technical discussion >and sneer at those who are; they have no idea how >their radios work inside and have no wish to find out; >they are free with rather silly personal insults; >they have not satisfied any technical qualification >and their licences prevent the use of >self-designed-and-built equipment. > >These CB types engage in the competitive activities >with their Cheque-Book-purchased off-the-shelf radios >in a forlorn effort to prove that they are Radio Hams. > >No _REAL_ Radio Hams are deceived by such people! > >-----ooooo----- > >One infallible way to disambiguate the CB Radio Hobbyist >from the _REAL_ Radio Ham is to solicit their view of the >difference between CB Radio and Ham Radio. A Radio Ham will >perceive Ham Radio to be a technical pursuit and will >perceive CB Radio to be a social communications facility >no different in essence to a land-line telephone or a >GSM mobile in the hands of a 6-year-old. Thus a Radio Ham >could also hold a CB licence safe in the knowledge that >such a licence says no more about him than having a land-line >telephone, whilst continuing to regard Ham Radio as a separate >technical pursuit. > >A CB Radio hobbyist, on the other hand, sees no difference between >a Ham Radio licence and a CB Radio licence. To him, they are >sisters-under-the-skin. Wrongly, the CB Radio Hobbyist then >tries to classify himself as the equal of the Radio >Ham when, in fact, he is nothing of the kind. A sure sign of >a CB Radio hobbyist is if he holds, or has ever held, a licence >issued under the gangrenous degeneration that is the >M3/CB Fools' Licence scheme. > >-----ooooo----- > >One group of people who claim to be of the standard of >Radio Hams but who are in reality nothing more than an >apology for the failure of a CBer are those class B >licensees who falsely proclaimed that they were against >the use of a Morse Test to control access to the HF >bands, until, that is, a test was introduced at their >intellectual level, the intellectual level of 6-year-olds. > >6 year-olds simply lack the mathematical tool kit to >enable them to handle even the simplest algebraic manipulation >for Ohm's Law and thus, the disgraceful Class Ber's in >the aforementioned category are not Radio Hams by any stretch >of the imagination! > >Remember - A sure sign of a CB Radio hobbyist is if he holds, >or has ever held, a licence issued under the gangrenous >degeneration that is the M3/CB Fools' Licence scheme! ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- Article: 94631 of rec.radio.amateur.homebrew From: Unknown Subject: Re: FAQ Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> Date: Fri, 21 Oct 2005 15:35:05 GMT On Fri, 21 Oct 2005 07:05:35 -0700, Polymath wrote: > What is Ham Radio? > Ham Radio is a hobby for the type of people who would be in local government but got thrown out for not being progressive enough. If your favourite hobby is hosting a committee or writing a new regulation then this is the hobby for you. To be a "proper" radio amateur you agree with one or more of the following : 1) I've voted Tory all my life 2) Im Over 50 3) Im Buracratic 4) I smoke a pipe or cigar 5) Im not a racist, I just don't like -Foreign people -People who speak differently -People who are not the same colour as me 6) HF is the one true mode, real radio doesn't use a microphone 7) In my day it was all CW *yawn* 8) Repeaters are for morons 9) Dam young people, fools the lot of them ra ra ra ! Join the RSGB ... 10) Data isn't a 'real' mode 11) Whats wrong with the licence as it is - I see nothing wrong. 12) You should have a NOV for anything that hasn't already been excluded by the licence 13) Nothing interesting happens above 30Mhz 14) I know all about computers, thats why I hate them 15) I'm a shit hot designer - my radio was designed by a small yellow man with more skill than me, but im not angry (see 5) 16) I make my own wire antennas that makes me an RF designer 17) People with less skill than me are worthless If you identify with this then this is the hobby for you. But hurry, be quick - when all the stupid old fuckers have died out then nobody will be left ........... Article: 94632 of rec.radio.amateur.homebrew From: Jock. Subject: Re: FAQ Date: Fri, 21 Oct 2005 15:39:26 +0000 Message-ID: <5o2il1pdkhg83i6t9vpk01ouflf236f9pl@4ax.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <1129907164.767284.255910@g49g2000cwa.googlegroups.com> On 21 Oct 2005 08:06:04 -0700, panteltje@yahoo.com wrote: >You just demonstrated that you are one of the worst discrimination >idiots I have ever met on Usenet, and I have been on Usenet for 13 >years. On radio much much longer. Look little motherf*cker, there >are even professors on CB. My goodness! Professors of what? >And there are clearly complete idiots like you that accidently got >an amateur radio license on the amateur bands. > >*Even if you get an amateur license, you are STILL an amateur.* > >Actually I worked in professional broadcasting and designed >professional transmitters. Golly! CB transmitters? >You just convinced me NOT to listen on amateur frequencies. >F*cking idiot moron. >hehe Not difficult to deduce that you are a CB-er. -- 73 de Jock. "Choice has always been a privilege of those who could afford to pay for it." - Ellen Frankfort Article: 94633 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Fri, 21 Oct 2005 19:11:52 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> Hold about a bit matey boy... Just because someone uses a CB doesnt make them a lower class person or less intellectual than an Amateur radio user. They may have brains far exceeding yours on several topics, just not on radio. Just because you know a bit about radio doesnt make you a higher class of person... IT JUST MEANS YOU KNOW ABOUT RADIO'S..... now try learning common sense, respect for ones fellow man and remember.. Amateur Radio.. Just like CB.. is JUST A HOBBY... I love the bit though where you say "it is neither my wish to insult them" but you manage to do it anyhow... 10-4 over and out .. or in your case QRT.. "Polymath" wrote in message news:1129905039.542653.237720@f14g2000cwb.googlegroups.com... > Because although CBers are in a different intellectual > class to Radio Hams, it is neither my wish to insult > them nor to enter into a discourse with them. > > CBers have the right to besport their habits in the > appropriate place as do all the lower classes, which > in this context is rrcb (and urrcb). > Article: 94634 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Fri, 21 Oct 2005 19:14:10 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <1129907164.767284.255910@g49g2000cwa.googlegroups.com> <5o2il1pdkhg83i6t9vpk01ouflf236f9pl@4ax.com> > Not difficult to deduce that you are a CB-er. Why is that then.. is it because he has friends, his house isn't full of bits of old crap and he doesnt stink of wee and biscuits?? Article: 94635 of rec.radio.amateur.homebrew From: Jock. Subject: Re: FAQ Date: Fri, 21 Oct 2005 21:10:02 +0000 Message-ID: <56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> On Fri, 21 Oct 2005 19:11:52 +0100, "The Magnum" wrote: >Hold about a bit matey boy... Just because someone uses a CB doesnt make >them a lower class person or less intellectual than an Amateur radio user. >They may have brains far exceeding yours on several topics, just not on >radio. Just because you know a bit about radio doesnt make you a higher >class of person... IT JUST MEANS YOU KNOW ABOUT RADIO'S..... now try >learning common sense, respect for ones fellow man and remember.. Amateur >Radio.. Just like CB.. is JUST A HOBBY... >I love the bit though where you say "it is neither my wish to insult them" >but you manage to do it anyhow... >10-4 over and out .. or in your case QRT.. Another CB-er and potential F-class adherent. (You can spot them the minute they put finger to keyboard). -- 73 de Jock. "Choice has always been a privilege of those who could afford to pay for it." - Ellen Frankfort Article: 94636 of rec.radio.amateur.homebrew From: "NetKKop" Subject: Re: FAQ Date: Fri, 21 Oct 2005 22:03:18 +0000 (UTC) Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129921366.139906.135630@g47g2000cwa.googlegroups.com> Now stop this at once please Children! GROW UP -- -- 73deG1LVN(M0WWS) it's back it's: http://qsy.to/ChorleyFM !! http://www.g1lvn.org.uk/wavefiles/ "Cmd Buzz Corey" wrote in message news:orudnSwvBMEiwcTenZ2dnUVZ_sqdnZ2d@gbronline.com... > whinyslit_lloydie@yahoo.com wrote: >> Cmd Buzz Corey wrote: >> >>>Frank Gilliland wrote: >>> >>>>Gee, why didn't you crosspost this to rrcb? >>> >>>Yeah, that was a waste of bandwidth, it is much too technical for cbers >>>to comprehend. >> >> >> Especially you. >> > > Hey wogie, tell us all about that negative swr. LOLOLOLOLOLOLOL!!!! Article: 94637 of rec.radio.amateur.homebrew From: "Ernie" References: <1129941087.768605.276780@g44g2000cwa.googlegroups.com> Subject: Re: Boy's Books Of Radio And Electronics Message-ID: Date: Sat, 22 Oct 2005 00:44:38 GMT wrote in message news:1129941087.768605.276780@g44g2000cwa.googlegroups.com... > Does anyone know the actual reason why eBay elected to terminate these > listings? > > Harry C. Harry, I checked and I found them still listed (eBay store). Apparently the the url I gave was defective---perhaps cut and paste the entire link into browser to get to them or do a eBay search for Alfred Morgan. There is also a 'second boy's book' for auction with bidding at $31. Maybe I'm slow but I have yet to find a way to properly post those page long urls so as to make a 1-click link. Article: 94638 of rec.radio.amateur.homebrew From: Allodoxaphobia Subject: Re: Boy's Books Of Radio And Electronics Date: 22 Oct 2005 01:26:23 GMT Message-ID: References: <1129941087.768605.276780@g44g2000cwa.googlegroups.com> On Sat, 22 Oct 2005 00:44:38 GMT, Ernie wrote: > > wrote in message > news:1129941087.768605.276780@g44g2000cwa.googlegroups.com... >> Does anyone know the actual reason why eBay elected to terminate these >> listings? > > Harry, I checked and I found them still listed (eBay store). Apparently the > the url I gave was defective---perhaps cut and paste the entire link into > browser to get to them or do a eBay search for Alfred Morgan. There is also > a 'second boy's book' for auction with bidding at $31. > > Maybe I'm slow but I have yet to find a way to properly post those page long > urls so as to make a 1-click link. http://tinyurl.com/ Article: 94639 of rec.radio.amateur.homebrew From: "Ernie" References: <1129941087.768605.276780@g44g2000cwa.googlegroups.com> Subject: Re: Boy's Books Of Radio And Electronics Message-ID: Date: Sat, 22 Oct 2005 02:00:13 GMT Allodoxaphobia wrote in message news:slrndlj59v.vua.bit-bucket@shell.config.com... > On Sat, 22 Oct 2005 00:44:38 GMT, Ernie wrote: > > > > wrote in message > > news:1129941087.768605.276780@g44g2000cwa.googlegroups.com... > >> Does anyone know the actual reason why eBay elected to terminate these > >> listings? > > > > Harry, I checked and I found them still listed (eBay store). Apparently the > > the url I gave was defective---perhaps cut and paste the entire link into > > browser to get to them or do a eBay search for Alfred Morgan. There is also > > a 'second boy's book' for auction with bidding at $31. > > > > Maybe I'm slow but I have yet to find a way to properly post those page long > > urls so as to make a 1-click link. > > http://tinyurl.com/ Yea... I've heard of them but the times folks used it, it didn't work. I'll check it out again---thanks for mentioning it. Article: 94640 of rec.radio.amateur.homebrew From: "Ernie" References: <1129941087.768605.276780@g44g2000cwa.googlegroups.com> Subject: Re: Boy's Books Of Radio And Electronics Message-ID: Date: Sat, 22 Oct 2005 02:00:13 GMT Ernie wrote in message news:WXf6f.165543$qY1.69186@bgtnsc04-news.ops.worldnet.att.net... > > wrote in message > news:1129941087.768605.276780@g44g2000cwa.googlegroups.com... > > Does anyone know the actual reason why eBay elected to terminate these > > listings? > > > > Harry C. > > Harry, I checked and I found them still listed (eBay store). Apparently the > the url I gave was defective---perhaps cut and paste the entire link into > browser to get to them or do a eBay search for Alfred Morgan. There is also > a 'second boy's book' for auction with bidding at $31. > > Maybe I'm slow but I have yet to find a way to properly post those page long > urls so as to make a 1-click link. Try these links: http://tinyurl.com/dv2mt http://tinyurl.com/bpyj9 Article: 94641 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Sat, 22 Oct 2005 10:06:27 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <1129907164.767284.255910@g49g2000cwa.googlegroups.com> <1129920662.717947.78290@g44g2000cwa.googlegroups.com> "Polymath" wrote in message news:1129920662.717947.78290@g44g2000cwa.googlegroups.com... > Unbeknown to me, this thread had already been cross-posted to > the CB groups, and I would have removed that cross-posting > had I been aware of it. > > In respect of that, I apologise if my remarks have caused > any offence to the CB community. However, I do not > withdraw my remarks - they are my opinion as to the > relative standing of Radio Hams and of CB Radio > enthusiasts where the playing-field is that of Radio > Hams. > > However, having said that, the material quoted below > serves, I think, to illustrate quite well the > intellectual standing of CB Radio enthusiasts > upon which I have commented..... > > panteltje@yahoo.com wrote: > > you are one of the worst.....idiots..... > > little motherf*cker.....complete idiots like > > you.....F*cking idiot moron. In the realms of talking specifically about radio apology accepted but everyone swears at some time. Amateurs included. While i dont condone it i can understand it. If you upset someone enough you "will" get this sort of response. Im a CB'er by the way. Regards, Graham Article: 94642 of rec.radio.amateur.homebrew From: "realradioham" References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Date: Sat, 22 Oct 2005 10:10:42 +0100 Message-ID: <435a0211$1_1@mk-nntp-2.news.uk.tiscali.com> I'm not a technical pursuit old boy... RRH "Polymath" wrote in message news:1129970452.489970.290430@g47g2000cwa.googlegroups.com... > _REAL_ Ham Radio is a technical pursuit. > > One area that remains easily open is the construction > of CW rigs - you need little more than an > oscillator. > > Off-the-shelf talk-boxes are the stuff of which > CB is made, and not Ham Radio. > > Therefore let us move to ban voice communications > from Ham Radio - a listen to 20m shows up inane > conversations from CB types only. > > CW comms has always been the essence of Ham Radio, > and remains a feature of Ham Radio now that the > commercial world has moved into Sat comms. > > So..... > 1. Restore the 12 WPM Morse test around the world. > 2. Cancel _ALL_ licences where the licensee has not > passed a 12 WPM Morse Test. > 3. Remove all band plans - only Morse is now allowed. > 4. All new licensees to be limited to their first year > op operation to 10W home-brewed rigs (And, of course, > on CW as there will be no more voice) > Let us fight the insidious march of the Mongolian > Hordes of CBers-Masquerading-As-Radio-Hams before it > is far too late! > Article: 94643 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Sat, 22 Oct 2005 10:12:56 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <1129907164.767284.255910@g49g2000cwa.googlegroups.com> <7cCdnf5aqtCzocTeRVn-gA@gbronline.com> <1129921774.753022.136570@f14g2000cwb.googlegroups.com> > > Roger that thar, ten-fer gud buddy, squwak-squeek, gotge ears on thar > > gud buddy, bring-it on MFer, aaaaaaaaauuuuuuuuuddddddddiiiiiiiiooooooooooo. > > You post like you have experience talking on it, loser. Do you know, in all my years of CB radio use ive never actually heard anyone talk like that on the CB. Ive been on since 1979 (not continuously, i do let go the mic occasionally ;o) The only people who talk like that are people who have no real idea of CB and are just taking the Mick. Am i wrong?? do people talk like that on the CB where you live?? Let us know where these people are so we can avoid them .... Graham Article: 94644 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Sat, 22 Oct 2005 10:16:35 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> "huLLy" wrote in message news:HuSdnaqXGLq2rMTeRVn-tg@giganews.com... > The Magnum wrote: > > Hold about a bit matey boy... Just because someone uses a CB doesnt > > make them a lower class person or less intellectual than an Amateur > > radio user. They may have brains far exceeding yours on several > > topics, just not on radio. Just because you know a bit about radio > > doesnt make you a higher class of person... IT JUST MEANS YOU KNOW > > ABOUT RADIO'S..... now try learning common sense, respect for ones > > fellow man and remember.. Amateur Radio.. Just like CB.. is JUST A > > HOBBY... > > I love the bit though where you say "it is neither my wish to insult > > them" but you manage to do it anyhow... > > 10-4 over and out .. or in your case QRT.. > > > > Poly Parrot has forgotten he has owned a CB and a license (still does, I > expect), ignore him.. having been arrested he is a prime example of what > amateur radio has descended to. > -- > huLLy > Mobile phone 07976 123278 > ICQ 136-987-925 Hi Hully, Unfortunately there are a few like him on the Amateur band. Its a shame really. Its meant to be a hobby after all and his attitude will put many prospective new Amateurs off as they will see it as an unfriendly place. Not good for the cause.. Regards, Graham Article: 94645 of rec.radio.amateur.homebrew From: "Gordon Hudson" References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> <1129971557.066053.205350@g49g2000cwa.googlegroups.com> Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Date: Sat, 22 Oct 2005 10:17:45 +0100 Message-ID: <435a03bb$0$38039$5a6aecb4@news.aaisp.net.uk> "Groid" wrote in message news:1129971557.066053.205350@g49g2000cwa.googlegroups.com... >A poor troll > you will really have to try harder > does anybody actually take notice of trolls this poor on here anymore ? is this like the Real_IRA then ? Article: 94646 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Sat, 22 Oct 2005 10:18:20 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> "Cmd Buzz Corey" wrote in message news:A-OdnZ0c6Peup8TeRVn-sA@gbronline.com... > Frank Gilliland wrote: > > > > Gee, why didn't you crosspost this to rrcb? > > Yeah, that was a waste of bandwidth, it is much too technical for cbers > to comprehend. You seem to think the average person would be interested..... suprising that. Now careful on that pedistall. Id hate for you to fall and hurt yourself. Article: 94647 of rec.radio.amateur.homebrew From: "The Magnum" Subject: Re: FAQ Date: Sat, 22 Oct 2005 10:23:37 +0100 Message-ID: References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com> "Jock." wrote in message news:56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com... > On Fri, 21 Oct 2005 19:11:52 +0100, "The Magnum" > wrote: > > >Hold about a bit matey boy... Just because someone uses a CB doesnt make > >them a lower class person or less intellectual than an Amateur radio user. > >They may have brains far exceeding yours on several topics, just not on > >radio. Just because you know a bit about radio doesnt make you a higher > >class of person... IT JUST MEANS YOU KNOW ABOUT RADIO'S..... now try > >learning common sense, respect for ones fellow man and remember.. Amateur > >Radio.. Just like CB.. is JUST A HOBBY... > >I love the bit though where you say "it is neither my wish to insult them" > >but you manage to do it anyhow... > >10-4 over and out .. or in your case QRT.. > > Another CB-er and potential F-class adherent. > > (You can spot them the minute they put finger to keyboard). Are you referring to me dear boy? Now perhaps you could explain your remarkable assumption. Perhaps its the bit where i dont pamper to the "mighty Amateur holier than tho attitude" .. who knows, ill wait for your reply.. > 73 de Jock. > > "Choice has always been a privilege of those who > could afford to pay for it." > - Ellen Frankfort Article: 94648 of rec.radio.amateur.homebrew Subject: Re: FAQ From: Steveo Date: 22 Oct 2005 10:33:50 GMT Message-ID: <20051022063350.853$5T@newsreader.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129921366.139906.135630@g47g2000cwa.googlegroups.com> <1129951304.873446.80390@g43g2000cwa.googlegroups.com> "N0VFP" wrote: > Cmd Buzz Corey wrote: > > whinyslit_lloydie@yahoo.com wrote: > > > Cmd Buzz Corey wrote: > > > > > >>Frank Gilliland wrote: > > >> > > >>>Gee, why didn't you crosspost this to rrcb? > > >> > > >>Yeah, that was a waste of bandwidth, it is much too technical for > > >>cbers to comprehend. > > > > > > > > > Especially you. > > > > > > > Hey wogie, tell us all about that negative swr. LOLOLOLOLOLOLOL!!!! > > Hey, dumbass, tell us how you have a "pilot's license" > HAHAHAHAHAHAHAHAHA!!!!!!!! > Is "Cmd Buzz Corey" a CB handle, or the name this anonymous no code shitstain uses on Usenet? He fakes being a pilot too? lol -- http://NewsReader.Com/ Article: 94649 of rec.radio.amateur.homebrew Subject: Re: Ping N8WWM dogie adair the section eight sissy From: Steveo Date: 22 Oct 2005 10:40:26 GMT Message-ID: <20051022064026.968$P1_-_@newsreader.com> References: <20050825201946.176$TH@newsreader.com> <9HuPe.2477$vu5.1601@fe11.lga> <20050825221133.917$D0@newsreader.com> <1126001248.707614.309030@g14g2000cwa.googlegroups.com> <20050906065203.167$vc@newsreader.com> <20051011200040.032$95@newsreader.com> <1129959971.629211.16270@g47g2000cwa.googlegroups.com> N8WWM posting as -"Keyclowns are limpwristed" wrote: > wrong, retard...nobody cares about your "attention". Like I said > before. We know where and who you are, and all the fun starts when WE > want to start. Not when you do. AKC owns you, and Uhl love how well we > maintain our property. > I've seen how well you maintain your section eight property, you cowardly sissy. Get busted for jamming the Toledo repeaters again lately? http://n8wwm.4t.com/ -- http://NewsReader.Com/ Article: 94650 of rec.radio.amateur.homebrew Subject: Re: FAQ From: Steveo Date: 22 Oct 2005 12:35:31 GMT Message-ID: <20051022083531.029$GT@newsreader.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129921366.139906.135630@g47g2000cwa.googlegroups.com> <1129951304.873446.80390@g43g2000cwa.googlegroups.com> <20051022063350.853$5T@newsreader.com> <1129983279.068909.215920@o13g2000cwo.googlegroups.com> whinyslit_lloydie@yahoo.com wrote: > Steveo wrote: > > "N0VFP" wrote: > > > Cmd Buzz Corey wrote: > > > > whinyslit_lloydie@yahoo.com wrote: > > > > > Cmd Buzz Corey wrote: > > > > > > > > > >>Frank Gilliland wrote: > > > > >> > > > > >>>Gee, why didn't you crosspost this to rrcb? > > > > >> > > > > >>Yeah, that was a waste of bandwidth, it is much too technical for > > > > >>cbers to comprehend. > > > > > > > > > > > > > > > Especially you. > > > > > > > > > > > > > Hey wogie, tell us all about that negative swr. LOLOLOLOLOLOLOL!!!! > > > > > > Hey, dumbass, tell us how you have a "pilot's license" > > > HAHAHAHAHAHAHAHAHA!!!!!!!! > > > > > Is "Cmd Buzz Corey" a CB handle, or the name this anonymous no code > > shitstain uses on Usenet? He fakes being a pilot too? lol > > Indeed. He claims to have both a now obsolete advanced ham ticket, > (unlikely) and a pilot's license (highly unlikely.)! But he hides > behind a cheezy handle swiped from a cheezy 50's sci-fi show. > He nym shifts too, he used to post as "JJ" from that TV show goodtimes..his CB handle was 'kid dynomite' back in the CB boom of the 70's. What a putz. -- http://NewsReader.Com/ Article: 94651 of rec.radio.amateur.homebrew From: "Heytubeguy" Subject: WTB:Heathkit parts Message-ID: Date: Sat, 22 Oct 2005 13:17:29 GMT Looking for a replacement round dial scale (0-100) for SB series and a low B+ choke for SB-401. What you got hidden away????? Joe Article: 94652 of rec.radio.amateur.homebrew Subject: Re: FAQ From: Steveo Date: 22 Oct 2005 14:37:36 GMT Message-ID: <20051022103736.581$CY@newsreader.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129921366.139906.135630@g47g2000cwa.googlegroups.com> <1129951304.873446.80390@g43g2000cwa.googlegroups.com> <20051022063350.853$5T@newsreader.com> <1129983279.068909.215920@o13g2000cwo.googlegroups.com> <20051022083531.029$GT@newsreader.com> <1129985089.363728.146880@g43g2000cwa.googlegroups.com> whinyslit_lloydie@yahoo.com wrote: > The Cmd of buttholes sure hasn't made any "DYNO-MITE" pronouncements on > the internet, has he? > He still loves his CB. -- http://NewsReader.Com/ Article: 94653 of rec.radio.amateur.homebrew From: Jock. Subject: Re: FAQ Date: Sat, 22 Oct 2005 15:35:13 +0000 Message-ID: <9mmkl1dpdj8alridh112p8updj9bbbng94@4ax.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com> On Sat, 22 Oct 2005 10:23:37 +0100, "The Magnum" wrote: >"Jock." wrote in message >news:56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com... >> On Fri, 21 Oct 2005 19:11:52 +0100, "The Magnum" >> wrote: >> Another CB-er and potential F-class adherent. >> >> (You can spot them the minute they put finger to keyboard). > >Are you referring to me dear boy? I am indeed, who else? >Now perhaps you could explain your remarkable assumption. >Perhaps its the bit where i dont pamper to the >"mighty Amateur holier than tho attitude" Which particular mis-spelt, mis-punctuated part was that? At least this "holier-than-tho" amateur knows how to trim and quote UseNet posts properly. >who knows, ill wait for your reply.. You'll wait a bloody long time then, I try not to cross- post too much, particularly to anything that smells of CB. -- 73 de Jock. "Choice has always been a privilege of those who could afford to pay for it." - Ellen Frankfort Article: 94654 of rec.radio.amateur.homebrew From: Jatin Subject: Ham radio kits Message-ID: Date: Sat, 22 Oct 2005 17:00:03 GMT Are there any places/sites where I can buy ham radio in Kit form? I want my daughtrer to build one for herself as an introduction to this new hobby. She just got her license. Thanks, Jatin ============== Article: 94655 of rec.radio.amateur.homebrew From: "Caveat Lector" References: Subject: Re: Ham radio kits Message-ID: Date: Sat, 22 Oct 2005 10:13:17 -0700 Lots of Ham Radio kits available at URL: http://ac6v.com/kits.htm#HAM Many different vendors If you can afford it and have the time -- try an Elecraft -- great transceiver http://www.elecraft.com/ -- CL -- I doubt, therefore I might be ! "Jatin" wrote in message news:neu6f.5518$q%.3129@newssvr12.news.prodigy.com... > Are there any places/sites where I can buy ham radio in Kit form? I want > my daughtrer to build one for herself as an introduction to this new > hobby. She just got her license. > > Thanks, > > Jatin > ============== Article: 94656 of rec.radio.amateur.homebrew From: James Skalski Subject: impedance of 2x 4cx800a ? Message-ID: Date: Sat, 22 Oct 2005 19:15:35 GMT What is the plate load impedance of a pair of 4cx800A tubes run at 2500VDC and 1500 watts out? I have read varying opinions on the amp groups ranging from 800ohms to 2100 ohms. I thought it might be 1600 ohms. :) Once the impedance is known I can try to determine the minimum tuning capacitance that I need. The pair of tubes are 22pf. What would be guesstimate of the stray capacitance in the tank circuit? I am undecided if I will use Pi or Pi-L network and whether it will be a load of 50 ohm or 200ohms with a toroid to bring it down to 50 ohms. I have to use real world parts.... I can use a vacuum cap to keep things simple. since I am not an engineer, I want to be sure that my guesses are in the ballpark... any input would be appreciated. Last time that I built an amp was over twenty years ago. It was a 4-1000a and I built the Hypersil plate transformer by hand winding it :) This time I will have Peter Dahl earn his money. Jim n2go Article: 94657 of rec.radio.amateur.homebrew From: "Jeff James" Subject: Buy and Sell your Tube Gear! Message-ID: Date: Sat, 22 Oct 2005 15:33:56 -0400 You never know what you'll find.. http://www.dealamerica.com/deal/cgi-bin/ads/bcads.cgi FREE ads Dedicated to Vintage Amateur Radio... Article: 94658 of rec.radio.amateur.homebrew From: "G1LVN \(for it is he\)" Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Date: Sat, 22 Oct 2005 20:25:24 +0000 (UTC) Message-ID: References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> "Bob Schreibmaier" wrote in message news:gTOdne6vLo5vAMfeUSdV9g@ptd.net... BEST WISHES, ALL THE HIGH NUMBERS 88'S 73 51'S ETC..10-10 till we do it AGAIN...DE ALL AT GBR@UK.RADIO.AMATEUR -- -- 73deG1LVN(M0WWS) it's back it's: http://qsy.to/ChorleyFM !! http://www.g1lvn.org.uk/wavefiles/ Article: 94659 of rec.radio.amateur.homebrew From: pierrejalbert@nhl.ca References: <20051022064026.968$P1_-_@newsreader.com> Subject: Re: Ping N8WWM dogie adair the section eight sissy Message-ID: Date: Sat, 22 Oct 2005 20:59:24 GMT > N8WWM posting as -"Keyclowns are limpwristed" > wrote: > > wrong, retard...nobody cares about your "attention". Like I said > > before. We know where and who you are, and all the fun starts when WE > > want to start. Not when you do. AKC owns you, and Uhl love how well we > > maintain our property. > > > I've seen how well you maintain your section eight property, you cowardly > sissy. Get busted for jamming the Toledo repeaters again lately? > > http://n8wwm.4t.com/ > > -- > http://NewsReader.Com/ what's your tech callsign steveo Article: 94660 of rec.radio.amateur.homebrew From: "SOMMERGIBILE" Subject: How to receive out of band signals.. Date: Sat, 22 Oct 2005 23:00:30 +0200 Message-ID: <435aa9a4$0$8479$5fc30a8@news.tiscali.it> by an VHF or UHF radio and other projects on: http://web.tiscali.it/am2zy/index.html Article: 94661 of rec.radio.amateur.homebrew Subject: Re: Ping N8WWM dogie adair the section eight sissy From: Steveo Date: 22 Oct 2005 21:34:57 GMT Message-ID: <20051022173457.734$nv@newsreader.com> References: <20051022064026.968$P1_-_@newsreader.com> pierrejalbert@nhl.ca wrote: > > N8WWM posting as -"Keyclowns are limpwristed" > > wrote: > > > wrong, retard...nobody cares about your "attention". Like I said > > > before. We know where and who you are, and all the fun starts when WE > > > want to start. Not when you do. AKC owns you, and Uhl love how well > > > we maintain our property. > > > > > I've seen how well you maintain your section eight property, you > > cowardly sissy. Get busted for jamming the Toledo repeaters again > > lately? > > > > http://n8wwm.4t.com/ > > > > -- > > http://NewsReader.Com/ > > what's your tech callsign steveo > Don't have one. Article: 94662 of rec.radio.amateur.homebrew From: Steve Stone Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Message-ID: References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> Date: Sat, 22 Oct 2005 23:43:32 GMT In article <1129970452.489970.290430@g47g2000cwa.googlegroups.com>, aiyr.r.bean@lycos.co.uk says... > So..... > 1. Restore the 12 WPM Morse test around the world. > 2. Cancel _ALL_ licences where the licensee has not > passed a 12 WPM Morse Test. > What is your FISTS number ??? Article: 94663 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: Using a Y5V dielectric capacitor for tuning Date: Sat, 22 Oct 2005 21:15:35 -0700 Message-ID: <11lm3mgh6s2l879@corp.supernews.com> I came across this link: https://www.avx.com/docs/techinfo/mlc-tant.pdf ... which points out that Y5V dielectric capacitors chance their effective capacitance across about a 5:1 range depending on the DC basis. Has anyone used this "feature" to obtain tuning in a radio? Similar to using a varactor diode's capacitance for the same effect? I'm thinking that it might not work as well as a varactor diode (especially given Y5V's very significant temperature dependence), but it still seems like it could be a novel idea for a low parts count receiver that didn't need particularly stable tuning. ---Joel Kolstad Article: 94664 of rec.radio.amateur.homebrew From: "Rightrik" Subject: Looking for 1296 MHz beacon project Date: Sun, 23 Oct 2005 10:38:39 +0200 Message-ID: <3s10ggFljbipU2@individual.net> Hello, i would like to realize a 1296 MHz beacon : do you have any good online projects or, better, kits, to suggest ? Thank you, 73 de Riccardo IK5WQO Article: 94665 of rec.radio.amateur.homebrew Subject: Re: Ping N8WWM dogie adair the section eight sissy From: Steveo Date: 23 Oct 2005 15:04:05 GMT Message-ID: <20051023110405.176$zw@newsreader.com> References: <20051022064026.968$P1_-_@newsreader.com> pierrejalbert@nhl.ca wrote: >> > http://n8wwm.4t.com/ > > > > -- > > http://NewsReader.Com/ > > what's your tech callsign steveo > What's your aol callsign, forge-fuck? Article: 94666 of rec.radio.amateur.homebrew From: "Landshark" References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <1129907164.767284.255910@g49g2000cwa.googlegroups.com> <5o2il1pdkhg83i6t9vpk01ouflf236f9pl@4ax.com> Subject: Re: FAQ Message-ID: Date: Sun, 23 Oct 2005 15:52:03 GMT "The Magnum" wrote in message news:djbb6g$hdr$1@newsg4.svr.pol.co.uk... > >> Not difficult to deduce that you are a CB-er. > > Why is that then.. is it because he has friends, his house isn't full of > bits of old crap and he doesnt stink of wee and biscuits?? In other words, a serving of Haggis ;) Landshark -- The internet is fun but it's no substitute for books, people, nature, or direct experiences. But you think that you can get everything you need from your computer, you are a fool. Frank Gililland Article: 94667 of rec.radio.amateur.homebrew From: Jatin Subject: Re: Ham radio kits References: Message-ID: Date: Sun, 23 Oct 2005 17:03:08 GMT Thanks. Just what I was looking for! Jatin ========== Caveat Lector wrote: > Lots of Ham Radio kits available at URL: > http://ac6v.com/kits.htm#HAM > > Many different vendors > > If you can afford it and have the time -- try an Elecraft -- great > transceiver > http://www.elecraft.com/ > Article: 94668 of rec.radio.amateur.homebrew From: "Dan/W4NTI" References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> <1130037779.336942.175210@g14g2000cwa.googlegroups.com> <1130044961.812225.287750@g49g2000cwa.googlegroups.com> Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Message-ID: Date: Sun, 23 Oct 2005 18:22:23 GMT "an_old_friend" wrote in message news:1130044961.812225.287750@g49g2000cwa.googlegroups.com... > > Polymath wrote: >> Nailsea Grammar School? > > you don't even know what he Means? > > good greif I know what Steve Stone means and I think the ARS would be > better off with Morse Code USE banned (but I don't addvocate it in the > US becuase I beleive the Code users have the right do such things even > if I find them wastefull or counter productive >> >> Steve Stone wrote: >> > >> > What is your FISTS number ??? > Oh please Mr. Know-it-all Markie explain to us ignorant Real Hams how using Morse Code is "wastefull or counter productive". I can hardly wait for this one. Dan/W4NTI Article: 94669 of rec.radio.amateur.homebrew From: "WildBlue" Subject: Curtis 8044 keyer chip Message-ID: Date: Sun, 23 Oct 2005 13:13:00 -0500 I have been looking high and low for a Curtis 8044 (16 pin) Keyer chip. I can't seem to find one anywhere.. Anyone have any ideas? Joe AG4QC Article: 94670 of rec.radio.amateur.homebrew From: "AG4QC" Subject: EAS decoder.. Message-ID: Date: Sun, 23 Oct 2005 14:04:46 -0500 We are looking to add EAS broadcasts to our local repeater. I was thinking we could build a EAS decoder and then determine which alerts to have repeated. Has anyone looked into building a EAS decoder? Joe -AG4QC Article: 94671 of rec.radio.amateur.homebrew Message-ID: <435BDF1F.386041D3@earthlink.net> From: "Michael A. Terrell" Subject: Re: Choice of iron powder toriod? References: <3B74f.437160$x96.227112@attbi_s72> <4354FDA4.196B67C2@earthlink.net> <43555560.1FB470CD@earthlink.net> <4355A812.CB7B0BEB@earthlink.net> <43567bcb$0$15079$ed2619ec@ptn-nntp-reader02.plus.net> Date: Sun, 23 Oct 2005 19:04:54 GMT Graham W wrote: > > Michael A. Terrell wrote: > > Joerg wrote: > >> > >> Hello Michael, > >> > >>> There is no reason to apologize for being good with analog. ;-) I > >>> worked as a broadcast engineer during the time they announced the > >>> first memory chip, (1101) which was a slow, noisy 256 bit * 1 DRAM > >>> with very critical timing. I also did analog and digital work on > >>> the microwave equipment built at Microdyne, before L3-Com closed > >>> the Ocala plant. > >>> > >> > >> Seems you started with digital stuff a year or two earlier than I > >> did. My first RAM had a whopping 1024 bits. Not bytes, bits. > >> 21...something, I could look it up since the device where its in > >> still works. > > > > 2114? 1K * 4 bits? > > Nah - 2102 1k * 1. That was one early memory chip i don't recall using. > Had 8 of 'em in in my homebuilt Nascom 1 computer which with a > 2708 UVEPROM for the 'monitor' was all the RAM for system and > user code and video store! Nevertheless, it was sufficient for a > machine code program to run 'Lunar Lander', hee hee. > > Collins filters were regarded as the bees knees in UK ham circles > but I never could afford one! The price was right, that day at the Dayton hamfest. ;-) > 73 de G3VPC -- ? Michael A. Terrell Central Florida Article: 94672 of rec.radio.amateur.homebrew Message-ID: <435BF1D1.8040207@invalid.invalid> From: Doug Smith W9WI Subject: Re: EAS decoder.. References: Date: Sun, 23 Oct 2005 20:25:54 GMT AG4QC wrote: > We are looking to add EAS broadcasts to our local repeater. I was thinking > we could build a EAS decoder and then determine which alerts to have > repeated. Has anyone looked into building a EAS decoder? I have, without much success. They used non-standard modem tones and data rates. (probably to discourage spoofing) I wonder if the easiest way might be to cannibalize a S.A.M.E. weather radio? You could even tap the warning lights to signal the repeater when an alert is present, and simply use the programming of the weather radio to decide which alerts to relay. -- Doug Smith W9WI Pleasant View (Nashville), TN EM66 http://www.w9wi.com Article: 94673 of rec.radio.amateur.homebrew From: "Caveat Lector" References: Subject: Re: Curtis 8044 keyer chip Message-ID: <7GS6f.8459$i%.4601@fed1read07> Date: Sun, 23 Oct 2005 13:48:21 -0700 Try MFJ Company Curtis Electro Devices - see MFJ USA Products and Services COMPONENT>INTEGRATED CIRCUIT; MORSE CODE>KEYER; Notes Curtis 8044 and 8044ABM keyer chips are being sold by MFJ. They have a small quantity priced at $19.95. >FROM URL: http://www.arrl.org/cgi-bin/tisfind?case=on&patt=MORSE+CODE%3EKEY -- CL -- I doubt, therefore I might be ! "WildBlue" wrote in message news:QoQ6f.45$XE2.313475@news.sisna.com... >I have been looking high and low for a Curtis 8044 (16 pin) Keyer chip. I >can't seem to find one anywhere.. > > Anyone have any ideas? > > Joe > AG4QC > Article: 94674 of rec.radio.amateur.homebrew Date: Sun, 23 Oct 2005 17:50:00 -0400 From: Bill Subject: Re: EAS decoder.. References: <435BF1D1.8040207@invalid.invalid> Message-ID: <79fd8$435c058b$4232bd92$14023@COQUI.NET> Doug Smith W9WI wrote: > I wonder if the easiest way might be to cannibalize a S.A.M.E. weather > radio? You could even tap the warning lights to signal the repeater > when an alert is present, and simply use the programming of the weather > radio to decide which alerts to relay. Agreed. Locally here they have been advertising EAS type consumer radios. From what I gather from the blurb they seem like the real thing with programmable municipality codes, programmable to your choice of alert tones, etc. I don't know what a S.A.M.E. is , maybe the same thing ? (Oops, sri for the pun) I haven't bothered to hear a brand name or price but I suspect its cheap enough to negate building your own from scratch. Good luck, Bill Article: 94675 of rec.radio.amateur.homebrew From: "Dan/W4NTI" References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> <1130037779.336942.175210@g14g2000cwa.googlegroups.com> <1130044961.812225.287750@g49g2000cwa.googlegroups.com> <1130100147.097922.31880@z14g2000cwz.googlegroups.com> Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Message-ID: Date: Sun, 23 Oct 2005 21:59:04 GMT "an_old_friend" wrote in message news:1130100147.097922.31880@z14g2000cwz.googlegroups.com... > > Dan/W4NTI wrote: >> "an_old_friend" wrote in message >> news:1130044961.812225.287750@g49g2000cwa.googlegroups.com... >> > >> > Polymath wrote: >> >> Nailsea Grammar School? >> > >> > you don't even know what he Means? >> > >> > good greif I know what Steve Stone means and I think the ARS would be >> > better off with Morse Code USE banned (but I don't addvocate it in the >> > US becuase I beleive the Code users have the right do such things even >> > if I find them wastefull or counter productive >> >> >> >> Steve Stone wrote: >> >> > >> >> > What is your FISTS number ??? >> > >> >> Oh please Mr. Know-it-all Markie explain to us ignorant Real Hams how >> using >> Morse Code is "wastefull or counter productive". I can hardly wait for >> this >> one. > > I oputght to make you wait for it > > > > > > > > > > > > > but I will not > > Morse Code use has brought about a Cult statuts that has clearly served > and will most likely continue to serve as a dividing point amoug the > memebers of the ARS > > I have more but if you want I will make you wait >> >> Dan/W4NTI > A cult you say? A dividing point you say? Who is the leader of this cult Markie? Do we stand around NAKED in a circle and summon demons? A dividing point? What might that be Markie? The CW qualified, and the NOT? Why is THAT such a problem to you? Because your too LAZY to memorize enough Morse to pass a multiple GUESS test at the ridicolous slow speed of FIVE WORDS A MINUTE? You could pass that by knowing 15 letters and guessing at the rest. I think the word of interest here is LAZY. Continue Markey.....I can hardly wait. Dan/W4NTI Article: 94676 of rec.radio.amateur.homebrew From: novatech@eskimo.com (Steven Swift) Subject: Re: High Q caps for 60 Khz loop antenna? Date: 23 Oct 2005 22:06:11 GMT Message-ID: References: <3m6ml1dm3ehvi06gap7r6stpgv0b479o1o@4ax.com> John Popelish writes: >TRABEM wrote: >> Thanks John, >> >> I did find metalized polypropylene caps in the Mouser catalog. Some >> are quite expensive for no apparent reason and a few are inexpensive. >> I still don't know why the big cost difference. >> >> There were many pages of metalized polyester film caps, not sure if >> they are ok or not. But, they are way cheaper, about half the price of >> the lowest priced metalized polystyrene caps. >> >> Are metalized polyester caps just as good as metalized polypropylene >> caps? >Mylar caps are pretty good, but not as stable or as high @ as polystyrene. >You might read through this dielectric tutorial: >http://my.execpc.com/~endlr/film.html You can easily get Q>1000 with polypropylene capactor. Wima made some really nice ones. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA Article: 94677 of rec.radio.amateur.homebrew From: "Alt Beer" Subject: MPS6543 Transistor Message-ID: Date: Sun, 23 Oct 2005 22:05:15 GMT My HP Q meter has a duff MPS6543 transistor. Anyone have one or know where I can obtain one? Thanks, John G3UGY Article: 94678 of rec.radio.amateur.homebrew From: "Asimov" Subject: High Q caps for 60 Khz loop antenna? Message-ID: References: Date: Mon, 24 Oct 2005 00:01:00 GMT "TRABEM" bravely wrote to "All" (22 Oct 05 23:58:10) --- on the heady topic of "High Q caps for 60 Khz loop antenna?" Hi, 60KHz really isn't all that demanding. How about polycarbonate, polystyrene, or mylar? The cheaper the better for receiving. There are 0,22uF and lower standard value caps in all the above types. Polystyrene are possibly the more stable but more easily damaged by the heat of soldering. Just heatsink the lead with needlenose pliers as close to the body as possible while soldering. A*s*i*m*o*v TR> From: TRABEM <> TR> Xref: core-easynews rec.radio.amateur.homebrew:88419 TR> What caps should I use for a resonant loop antenna for VLF? I have TR> some antenna plans and need .2 uf total capacitance to resonate a loop TR> antenna at 60 Khz. [,,,] TR> Any suggestions for 50,000 pF caps that don't cost a fortune? TR> Note that this is a receive only antenna so voltage rating and current TR> carrying capacity are not an issue. TR> Thanks. ... A mind is a terrible thing to ...oooohhhhh, pastel Wonderbras. Article: 94679 of rec.radio.amateur.homebrew From: "Dan/W4NTI" References: <1129970452.489970.290430@g47g2000cwa.googlegroups.com> <1130037779.336942.175210@g14g2000cwa.googlegroups.com> <1130044961.812225.287750@g49g2000cwa.googlegroups.com> <1130100147.097922.31880@z14g2000cwz.googlegroups.com> <1130106399.644208.224450@f14g2000cwb.googlegroups.com> Subject: Re: Putting the "Real" back into _REAL_ Ham Radio Message-ID: <6uW6f.19062$QE1.12984@newsread2.news.atl.earthlink.net> Date: Mon, 24 Oct 2005 01:08:18 GMT "an_old_friend" wrote in message news:1130106399.644208.224450@f14g2000cwb.googlegroups.com... > > Dan/W4NTI wrote: >> "an_old_friend" wrote in message >> news:1130100147.097922.31880@z14g2000cwz.googlegroups.com... >> > >> > Dan/W4NTI wrote: >> >> "an_old_friend" wrote in message >> >> news:1130044961.812225.287750@g49g2000cwa.googlegroups.com... >> >> > >> >> > Polymath wrote: >> >> >> Nailsea Grammar School? >> >> > >> >> > you don't even know what he Means? >> >> > >> >> > good greif I know what Steve Stone means and I think the ARS would >> >> > be >> >> > better off with Morse Code USE banned (but I don't addvocate it in >> >> > the >> >> > US becuase I beleive the Code users have the right do such things >> >> > even >> >> > if I find them wastefull or counter productive >> >> >> >> >> >> Steve Stone wrote: >> >> >> > >> >> >> > What is your FISTS number ??? >> >> > >> >> >> >> Oh please Mr. Know-it-all Markie explain to us ignorant Real Hams how >> >> using >> >> Morse Code is "wastefull or counter productive". I can hardly wait >> >> for >> >> this >> >> one. >> > >> > I oputght to make you wait for it >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > but I will not >> > >> > Morse Code use has brought about a Cult statuts that has clearly served >> > and will most likely continue to serve as a dividing point amoug the >> > memebers of the ARS >> > >> > I have more but if you want I will make you wait >> >> >> >> Dan/W4NTI >> > >> >> A cult you say? > yes and others have as well > Who, where, when did others say that. Prove it Moron. >> A dividing point you say? > > certainly Thats it Markey? Is this the best you can do wimp? >> Who is the leader of this cult >> Markie? > > well I rather to name the Late Maxim dead a buried leaders are safer > Hiram Percy Maxim I presume is who you are defiling. And you wonder why people want to kick your ass. HPM among other things was the founder of the ARRL. And you claim he was the head of a cult consisting of CW users? BWAHHHHHHAAAAAAAAAAAAAA what a flippin idiot you are you discusting excuse for a human being. Maybe someone will use on of Mr. Maxims inventions to give you a attitude adjustment. Any idea what that might be moron? > but realy I don't get the memos of the cult of the MMM, being that I am > not on the membership roster >>Do we stand around NAKED in a circle and summon demons? > > again I would not know, but I am inclinded to doubt it > >> >> A dividing point? What might that be Markie? The CW qualified, and the >> NOT? Why is THAT such a problem to you? Because your too LAZY to >> memorize >> enough Morse to pass a multiple GUESS test at the ridicolous slow speed >> of >> FIVE WORDS A MINUTE? You could pass that by knowing 15 letters and >> guessing >> at the rest. >> >> I think the word of interest here is LAZY. > > nothing you have said before, fortunately the FCC can see though that > line of BS even if you can't > BWAHAAAAAAAAAAA... what a moron. The FCC is only doing what IT THINKS the hams want. Based on people like you. You are the reason ham radio went to hell in the last few decades. You and your ilk need to be removed from the service. You are the cause of this whole mess. And you want me and others that are old enough to know what ham radio used to be fall for you bs. Well forget it Asshole, we know better. > >> >> Continue Markey.....I can hardly wait. > > when you going to pay me? >> Ever see Candid Camera? You figure it out moron. Dan/W4NTI Article: 94680 of rec.radio.amateur.homebrew Subject: Re: Putting the "Real" back into _REAL_ Ham Radio From: Frank Gilliland Date: Sun, 23 Oct 2005 19:11:35 -0700 Message-ID: <66gol15lkr364ip6snlnqh8cmna0nr83pa@4ax.com> References: <1130037779.336942.175210@g14g2000cwa.googlegroups.com> <1130044961.812225.287750@g49g2000cwa.googlegroups.com> <1130100147.097922.31880@z14g2000cwz.googlegroups.com> <1130106399.644208.224450@f14g2000cwb.googlegroups.com> <6uW6f.19062$QE1.12984@newsread2.news.atl.earthlink.net> On Mon, 24 Oct 2005 01:08:18 GMT, "Dan/W4NTI" wrote in <6uW6f.19062$QE1.12984@newsread2.news.atl.earthlink.net>: >>> I think the word of interest here is LAZY. >> >> nothing you have said before, fortunately the FCC can see though that >> line of BS even if you can't >> > >BWAHAAAAAAAAAAA... what a moron. The FCC is only doing what IT THINKS the >hams want. Based on people like you. Gee, and here I thought the FCC was acting on behalf of the ARRL lobby..... easier tests = more hams = more revenue from RAH sales, membership dues, sponsor organizations, federal grants, etc, etc. ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- Article: 94681 of rec.radio.amateur.homebrew From: Jim Adney Subject: Re: Using a Y5V dielectric capacitor for tuning Date: Sun, 23 Oct 2005 21:12:21 -0500 Message-ID: References: <11lm3mgh6s2l879@corp.supernews.com> On Sat, 22 Oct 2005 21:15:35 -0700 "Joel Kolstad" wrote: >I came across this link: https://www.avx.com/docs/techinfo/mlc-tant.pdf ... >which points out that Y5V dielectric capacitors chance their effective >capacitance across about a 5:1 range depending on the DC basis. Has anyone >used this "feature" to obtain tuning in a radio? Similar to using a varactor >diode's capacitance for the same effect? I'm thinking that it might not work >as well as a varactor diode (especially given Y5V's very significant >temperature dependence), but it still seems like it could be a novel idea for >a low parts count receiver that didn't need particularly stable tuning. The 5:1 range is more than I remember. All class 2 ceramics will do this to some extent, but the nonlinear tempco is the drawback. Varactor diodes have a much smaller C range, but that can be dealt with. - ----------------------------------------------- Jim Adney jadney@vwtype3.org Madison, WI 53711 USA ----------------------------------------------- Article: 94682 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: Wideband RF blocking Date: Sun, 23 Oct 2005 20:26:37 -0700 Message-ID: <11lol6n6q2qsjc0@corp.supernews.com> In a receiver, for wideband (10-150MHz) biasing of a MMIC amplifier using inductors between the RF trace and the power rails, I'm finding that a single inductor tends not to work so well due to (1) wanting a largish inductor (say, one with 500 ohms of reactance at 10MHz in a 50 ohm system --> 8uH) but (2) not going beyond the self-resonant frequency of the inductor, which of course is smaller the larger the inductance (that 8uH inductor might typically have an SRF of 50MHz, noticeably below the 150MHz I'm trying to achieve RF blocking to!). Is there a better means of providing wideband DC biasing/RF blocking than just placing a large and small inductor in series? I've run SPICE simulations of this, and -- just as when you stack multiple capacitors in parallel for wider RF coupling -- there are significant anti-resonances that drop the overall reactance of the pair of inductors to much less than 500 ohm (even less than 50 ohms!) unless you're very careful in the choice of individual inductor SRFs, inductances, etc. Thanks, ---Joel Kolstad Article: 94683 of rec.radio.amateur.homebrew From: Paul Keinanen Subject: Re: High Q caps for 60 Khz loop antenna? Message-ID: References: <6aaol19b77u80qimdn2mf24oj1dc03i1o3@4ax.com> Date: Mon, 24 Oct 2005 08:32:58 +0300 On Sun, 23 Oct 2005 20:34:17 -0400, TRABEM <> wrote: >I am going to feed this into a quadrature front end, which has a >problem with harmonics getting into the receiver. My hope is to use >the loop as the sole tuning for the front end of the receiver, so >maintaining the highest possible Q is imperative. Before going to such extreme measures, are you absolutely sure that the "harmonics" are entering the receiver from the actual loop due to insufficient Q and _not_ sneaking in through the cable shield, power supply lines etc. or other antenna effects ? Even if you have a single strong unwanted signal at some harmonic frequency, taking it out with a high-Q notch filter prior to the mixer(s) would be easier. An isolation stage (emitter follower etc.) might be needed between the receiver loop and the notch filter to prevent too much interaction. Paul OH3LWR Article: 94684 of rec.radio.amateur.homebrew From: "DrDeath" Subject: Re: FAQ Date: Mon, 24 Oct 2005 00:51:03 -0500 Message-ID: <11loti63r2mj524@corp.supernews.com> References: <1129903535.253354.121770@g47g2000cwa.googlegroups.com> <1129905039.542653.237720@f14g2000cwb.googlegroups.com> <56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com> "Jock." wrote in message news:56mil11d1o9mpajvcsq8fnfocq43gv0te1@4ax.com... > On Fri, 21 Oct 2005 19:11:52 +0100, "The Magnum" > wrote: > >>Hold about a bit matey boy... Just because someone uses a CB doesnt make >>them a lower class person or less intellectual than an Amateur radio user. >>They may have brains far exceeding yours on several topics, just not on >>radio. Just because you know a bit about radio doesnt make you a higher >>class of person... IT JUST MEANS YOU KNOW ABOUT RADIO'S..... now try >>learning common sense, respect for ones fellow man and remember.. Amateur >>Radio.. Just like CB.. is JUST A HOBBY... >>I love the bit though where you say "it is neither my wish to insult them" >>but you manage to do it anyhow... >>10-4 over and out .. or in your case QRT.. > > Another CB-er and potential F-class adherent. > > (You can spot them the minute they put finger to keyboard). Yet another reason I will never obtain a ham ticket. You seem to think that your little piece of paper raises your IQ. Article: 94685 of rec.radio.amateur.homebrew From: "DrDeath" Subject: Re: Ping N8WWM dogie adair the section eight sissy Date: Mon, 24 Oct 2005 01:31:45 -0500 Message-ID: <11lovuh1v5uht52@corp.supernews.com> References: <20051022064026.968$P1_-_@newsreader.com> "Cmdr Buzz Corey" wrote in message news:EZWdncRzmMO238HeRVn-oQ@gbronline.com... > pierrejalbert@nhl.ca wrote: >>>N8WWM posting as -"Keyclowns are limpwristed" >>> >>>wrote: >>> >>>>wrong, retard...nobody cares about your "attention". Like I said >>>>before. We know where and who you are, and all the fun starts when WE >>>>want to start. Not when you do. AKC owns you, and Uhl love how well we >>>>maintain our property. >>>> >>> >>>I've seen how well you maintain your section eight property, you cowardly >>>sissy. Get busted for jamming the Toledo repeaters again lately? >>> >>>http://n8wwm.4t.com/ >>> >>>-- >>> http://NewsReader.Com/ >> >> >> >> what's your tech callsign steveo > > Steveo can't even get a no-code tech. Why would he want it? I should get one, wipe my ass with it and send it to the FCC. Article: 94686 of rec.radio.amateur.homebrew Subject: Re: Ping N8WWM dogie adair the section eight sissy From: Steveo Date: 24 Oct 2005 10:38:51 GMT Message-ID: <20051024063851.281$Gh@newsreader.com> References: <20051022064026.968$P1_-_@newsreader.com> Cmdr Buzz Corey wrote: > pierrejalbert@nhl.ca wrote: > >>N8WWM posting as -"Keyclowns are limpwristed" > >> wrote: > >> > >>>wrong, retard...nobody cares about your "attention". Like I said > >>>before. We know where and who you are, and all the fun starts when WE > >>>want to start. Not when you do. AKC owns you, and Uhl love how well we > >>>maintain our property. > >>> > >> > >>I've seen how well you maintain your section eight property, you > >>cowardly sissy. Get busted for jamming the Toledo repeaters again > >>lately? > >> > >>http://n8wwm.4t.com/ > >> > >>-- > >> http://NewsReader.Com/ > > > > > > > > what's your tech callsign steveo > > Steveo can't even get a no-code tech. > Stop bragging about being a no code, JJ the model airplane pilot. Article: 94687 of rec.radio.amateur.homebrew Subject: Re: Ping N8WWM dogie adair the section eight sissy From: Steveo Date: 24 Oct 2005 10:40:22 GMT Message-ID: <20051024064022.734$Nn@newsreader.com> References: <20051022064026.968$P1_-_@newsreader.com> <11lovuh1v5uht52@corp.supernews.com> "DrDeath" wrote: > "Cmdr Buzz Corey" wrote in message > news:EZWdncRzmMO238HeRVn-oQ@gbronline.com... > > pierrejalbert@nhl.ca wrote: > >>>N8WWM posting as -"Keyclowns are limpwristed" > >>> > >>>wrote: > >>> > >>>>wrong, retard...nobody cares about your "attention". Like I said > >>>>before. We know where and who you are, and all the fun starts when WE > >>>>want to start. Not when you do. AKC owns you, and Uhl love how well > >>>>we maintain our property. > >>>> > >>> > >>>I've seen how well you maintain your section eight property, you > >>>cowardly sissy. Get busted for jamming the Toledo repeaters again > >>>lately? > >>> > >>>http://n8wwm.4t.com/ > >>> > >>>-- > >>> http://NewsReader.Com/ > >> > >> > >> > >> what's your tech callsign steveo > > > > Steveo can't even get a no-code tech. > > Why would he want it? > I should get one, wipe my ass with it and send it to the FCC. > Cmd buzzard thinks he's special with his space patrol walkie-talkie. Article: 94688 of rec.radio.amateur.homebrew From: "Asimov" Subject: Wideband RF blocking Message-ID: References: <11lol6n6q2qsjc0@corp.supernews.com> Date: Mon, 24 Oct 2005 12:11:11 GMT "Joel Kolstad" bravely wrote to "All" (23 Oct 05 20:26:37) --- on the heady topic of "Wideband RF blocking" Add series or/and parallel resistance to dampen the resonances. A*s*i*m*o*v JK> From: "Joel Kolstad" JK> Xref: core-easynews rec.radio.amateur.homebrew:88454 JK> In a receiver, for wideband (10-150MHz) biasing of a MMIC amplifier JK> using inductors between the RF trace and the power rails, I'm finding JK> that a single inductor tends not to work so well due to (1) wanting a JK> largish inductor (say, one with 500 ohms of reactance at 10MHz in a 50 JK> ohm system --> 8uH) but (2) not going beyond the self-resonant JK> frequency of the inductor, which of course is smaller the larger the JK> inductance (that 8uH inductor might typically have an SRF of 50MHz, JK> noticeably below the 150MHz I'm trying to achieve RF blocking to!). JK> Is there a better means of providing wideband DC biasing/RF blocking JK> than just placing a large and small inductor in series? I've run JK> SPICE simulations of this, and -- just as when you stack multiple JK> capacitors in parallel for wider RF coupling -- there are significant JK> anti-resonances that drop the overall reactance of the pair of JK> inductors to much less than 500 ohm (even less than 50 ohms!) unless JK> you're very careful in the choice of individual inductor SRFs, JK> inductances, etc. JK> Thanks, JK> ---Joel Kolstad ... Why do we park on driveways and drive on parkways? Article: 94689 of rec.radio.amateur.homebrew Message-ID: <435CE593.2090101@invalid.invalid> From: Doug Smith W9WI Subject: Re: EAS decoder.. References: <435BF1D1.8040207@invalid.invalid> <79fd8$435c058b$4232bd92$14023@COQUI.NET> Date: Mon, 24 Oct 2005 13:46:03 GMT Bill wrote: > Agreed. Locally here they have been advertising EAS type consumer > radios. From what I gather from the blurb they seem like the real thing > with programmable municipality codes, programmable to your choice of > alert tones, etc. I don't know what a S.A.M.E. is , maybe the same > thing ? (Oops, sri for the pun) S.A.M.E. = Specific Area Message Encoding. It decodes the EAS bursts so you can program it to only respond to alerts for your area, as opposed to the older radios that keyed on the alert tone & would go off for everything. > I haven't bothered to hear a brand name or price but I suspect its cheap > enough to negate building your own from scratch. Radio Shack sells them, for well under $100. However, the model I had can only be programmed for location, not for alert type. (i.e. you can program which counties it'll go off for, but it'll go off for all types of alert for those counties. If they issue another Amber Alert at 3am I'm going to turn the d*mned thing off...) -- Doug Smith W9WI Pleasant View (Nashville), TN EM66 http://www.w9wi.com Article: 94690 of rec.radio.amateur.homebrew From: Eamon Skelton Subject: Re: 4CX250B amp, with lumped output tuning Message-ID: References: <1130140574.864981.323150@f14g2000cwb.googlegroups.com> Date: Mon, 24 Oct 2005 14:11:59 +0000 On Mon, 24 Oct 2005 00:56:14 -0700, MarkAren wrote: > Hi All, > > I am contemplating the design of a class C amp for 144MHz using wound > output inductors and a split stator (butterfly) tuning cap. This seems to > be a very common approach in the good old days for QQV06-40As, but I don't > think that I have seen such a design for 250Bs in push pull. There is a design for a 2M amp using a single 4CX250B in the old RSGB VHF/UHF Manual. The inductor in the anode circuit is 3.5 turns of 1/8 inch copper tube. The output coupling loop is 1 turn. I don't see any reason why you couldn't make a push-pull version with a pair of 250Bs. > The issue of voltage rating of the o/p cap is of course an issue, and the > output coupling loop will need to be well insulated (assume 1500VDC on the > anodes). You can reduce the risk of frying the operator by grounding one end of the output coupling loop. > Any obvious reason that this isn't a common approach ? The only advantage I can see with this arrangment is a reduction in the size of the amp. Since a 500W tube amp will require a large power supply, I don't see much point in building a tiny PA. A stripline amp will give greater efficiency and will only be a little bit bigger. 73, C U on 2M. Ed. EI9GQ. -- linux-2.6.13 Remove 'X' to reply by e-mail. Article: 94691 of rec.radio.amateur.homebrew From: Larry Gagnon Subject: Re: Curtis 8044 keyer chip Date: Mon, 24 Oct 2005 07:30:00 -0700 Message-ID: References: On Sun, 23 Oct 2005 13:13:00 -0500, WildBlue wrote: > I have been looking high and low for a Curtis 8044 (16 pin) Keyer chip. I > can't seem to find one anywhere.. > > Anyone have any ideas? > > Joe > AG4QC If you need a replacement the other poster gave you the details. But if you want a MUCH more powerful keyer chip, for less, try http://www.k1el.com Larry VE7EA Article: 94693 of rec.radio.amateur.homebrew Date: Mon, 24 Oct 2005 13:30:47 -0400 From: Bill Subject: Re: EAS decoder.. References: <435BF1D1.8040207@invalid.invalid> <79fd8$435c058b$4232bd92$14023@COQUI.NET> <435CE593.2090101@invalid.invalid> Message-ID: <3d745$435d1a4a$4232bd24$24871@COQUI.NET> Doug Smith W9WI wrote: >> I haven't bothered to hear a brand name or price but I suspect its >> cheap enough to negate building your own from scratch. > > > Radio Shack sells them, for well under $100. However, the model I had > can only be programmed for location, not for alert type. (i.e. you can > program which counties it'll go off for, but it'll go off for all types > of alert for those counties. If they issue another Amber Alert at 3am > I'm going to turn the d*mned thing off...) I heard the ad again. Midland WR-100, $39.95 at Walgreen's. Says its programmable for 60 types of alerts, municipality coding, etc. -Bill Article: 94694 of rec.radio.amateur.homebrew From: "Joel Kolstad" Subject: Re: Wideband RF blocking Date: Mon, 24 Oct 2005 15:02:44 -0700 Message-ID: <11lqmjjo35gdce2@corp.supernews.com> References: <11lol6n6q2qsjc0@corp.supernews.com> > Have a look at the ADCH-80A from Mini-Circuits -- it's designed > expressly to bias MMICs. Good to several GHz. Thanks, that's a pretty nice part! Article: 94695 of rec.radio.amateur.homebrew From: novatech@eskimo.com (Steven Swift) Subject: Re: High Q caps for 60 Khz loop antenna? Date: 25 Oct 2005 00:16:19 GMT Message-ID: References: <3m6ml1dm3ehvi06gap7r6stpgv0b479o1o@4ax.com> TRABEM <> writes: >>> Are metalized polyester caps just as good as metalized polypropylene >>> caps? >> >>Mylar caps are pretty good, but not as stable or as high @ as polystyrene. >> Wrap-and-fill polypropylene are a lot better than metalized polyester (mylar is a trade name for polyester). Mylar also absorbs water and shifts its Q with time rather badly. If you care about Q for large values, polypropylene is going to be your best shot. There are other caps (teflon, and other exotic materials) that are better, but you also seemed concerned with cost. Higher voltage for the same value with give a better Q. Good luck. Steve. -- Steven D. Swift, novatech@eskimo.com, http://www.novatech-instr.com NOVATECH INSTRUMENTS, INC. P.O. Box 55997 206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA