Article: 93820 of rec.radio.amateur.homebrew From: Jim Adney Subject: Re: Inadvertant mixing -- what was I hearing? Date: Mon, 25 Jul 2005 22:35:32 -0500 Message-ID: References: On Mon, 25 Jul 2005 16:16:30 -0500 Ben Jackson wrote: >I got a bunch of identically (but cryptically) marked crystals that I >wanted a ballpark idea about so I built the oscillator part of the Pixie >II (up to Q1) and put a scope on it. It was around 20MHz, so I grabbed >my HT and tuned around 20MHz to see if I could find it (this, by the >way, is why you should not borrow the lcd display from your frequency >counter for another project...). What I discovered was several signals >above 20MHz (eg 21.040) that only existed when the oscillator was on. Could your crystals just be oscillating at 21.040? A real frequency counter can be really useful in cases like this. I have some for sale if you, or anyone is interested. - ----------------------------------------------- Jim Adney jadney@vwtype3.org Madison, WI 53711 USA ----------------------------------------------- Article: 93821 of rec.radio.amateur.homebrew Date: Tue, 26 Jul 2005 09:57:56 +0200 From: PaoloC Subject: Re: BF0 Circuit References: <1122315009.889610.131090@g14g2000cwa.googlegroups.com> Message-ID: <42e5eca9_2@x-privat.org> pdrunen@aol.com wrote: Hi Paul > I am looking at moving the old CB up to 10meter CW/SSB, One thing I > have never seen is the addition of a BFO circuit to copy SSB and CW. If you have an AM CB you will be able to receive DSB by the addition of a BFO. It might work for sending CW, since it is an unmodulated carrier afterall (some 10m beacons are recycled CB RTXes). You won't be able to transmit SSB, though! > The radio has a first IF of 10.695 MHz and the next one is 455KHz. > > I believe that 455KHz is the place to add the BFO and I think that the > 455KHz IF must be mixed with another frequency, say either +/- 1KHz to > get the sidetone. Correct. You need to inject a 455kHz into the second conversion mixer. You don't necessarily need to phisically connect it to the circuitry, over-the-air coupling should suffice. > I don't know if this would work for SSB reception? Sure it does! (provided your starting point has AM reception). See my pages http://spazioinwind.libero.it/ik1zyw/hardware/osc455.html and http://spazioinwind.libero.it/ik1zyw/hardware/osc455notes.html for some operating notes. Please disregard the circuit shown since there are better solutions. > How about Double-side band modulation, it would have both LSB and USB > but at least it would be interesting to experiment with. With an external BFO you'll be actually receiving DSB, so no discrimination between U and LSB. CW stations will appear twice as you tune up the band. Anyway, since 10m at this time of the solar cycle are not too crowded (from the European point of view), you should not suffer opposite sideband interference from off-frequency stations. Making the BFO frequency agile should overcome your channelized CB limitations. I haven't been playing with this setup for a while, but it works. 73, Paolo/Paul IK1ZYW Article: 93822 of rec.radio.amateur.homebrew From: Yukio YANO Subject: Re: BF0 Circuit References: <1122315009.889610.131090@g14g2000cwa.googlegroups.com> Message-ID: <4WyFe.45555$5V4.41179@pd7tw3no> Date: Tue, 26 Jul 2005 22:36:48 GMT pdrunen@aol.com wrote: > Hi Group, > > I am looking at moving the old CB up to 10meter CW/SSB, One thing I > have never seen is the addition of a BFO circuit to copy SSB and CW. > > The radio has a first IF of 10.695 MHz and the next one is 455KHz. > > I believe that 455KHz is the place to add the BFO and I think that the > 455KHz IF must be mixed with another frequency, say either +/- 1KHz to > get the sidetone. > > I don't know if this would work for SSB reception? > > How about Double-side band modulation, it would have both LSB and USB > but at least it would be interesting to experiment with. > > If you know of a circuit or article, please post. > > I look forward to your posting. > > Paul > KJ4UO > EM60 > Why would you want to re-invent the wheel !!! There are millions of old 40 channel AM/SSB Cb sets available that are easily convertable to Ten Meters with a exacto knife and a bit of solder IS THIS A TROLL !!! Yukio YANO Article: 93823 of rec.radio.amateur.homebrew From: dplatt@radagast.org (Dave Platt) Subject: Re: BF0 Circuit Date: Tue, 26 Jul 2005 22:42:47 -0000 Message-ID: <11edf37n65dmna2@corp.supernews.com> References: <1122315009.889610.131090@g14g2000cwa.googlegroups.com> <4WyFe.45555$5V4.41179@pd7tw3no> In article <4WyFe.45555$5V4.41179@pd7tw3no>, Yukio YANO wrote: >pdrunen@aol.com wrote: >> I am looking at moving the old CB up to 10meter CW/SSB, One thing I >> have never seen is the addition of a BFO circuit to copy SSB and CW. >Why would you want to re-invent the wheel !!! > >There are millions of old 40 channel AM/SSB Cb sets available that are >easily convertable to Ten Meters with a exacto knife and a bit of solder Possibly he's interested in it precisely because of the experimentation and learning required? Because it might increase his own understanding and skill level, as a result of figuring out how to do it? That is, after all, one of the justifications for amateur radio here in the U.S.! -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! Article: 93824 of rec.radio.amateur.homebrew From: "Steve Nosko" Subject: Re: Inadvertant mixing -- what was I hearing? Date: Tue, 26 Jul 2005 17:21:06 -0500 Message-ID: References: If they are very strong, perhaps you can use a relatively poor antenna so it only picks up strong signals and try putting it into scan It helps to know: 1- How did you determined the "..around 20MHz..." number. It could actually be 1/2, 1/3, 1/4 that freq. 2- Were you able to hear the true, exact oscillator signal with the receiver. 3- the IF of the receiver used and 4- what frequencies you had the reveiver tuned to when you heard these signals. The front end of these wide coverage handhelds are pretty broad with almost no filtering. The oscillator can easily act as an L.O. Where F1 and F2 are the oscillator and the receiver L.O.: The result can be F1 +/- F2 +/- the IF frequency. Then it can be N * F1 and N * F2 that can be the culprets where N = 1, 2, 3. Chances are pretty good that the signals are not much above 20MHz. Use a spreadsheet to do the math and it is easier to cover all these cases when you have some frequencies to enter. 73, Steve, K.9'D;C,i "Ben Jackson" wrote in message news:slrndealle.1vpi.ben@saturn.home.ben.com... > I got a bunch of identically (but cryptically) marked crystals that I > wanted a ballpark idea about so I built the oscillator part of the Pixie > II (up to Q1) and put a scope on it. It was around 20MHz, so I grabbed > my HT and tuned around 20MHz to see if I could find it (this, by the > way, is why you should not borrow the lcd display from your frequency > counter for another project...). What I discovered was several signals > above 20MHz (eg 21.040) that only existed when the oscillator was on. > I assumed it was picking up something else and mixing it with 20MHz so > I tried to find the original signals at 1040kHz but I couldn't. The > "mixed" signals were very clear and strong. It was some kind of news > (shortwave?) in an Asian language. > > Where else should I have looked for the base signal? ~41MHz would be > in the middle of a government band. > > -- > Ben Jackson > > http://www.ben.com/ Article: 93825 of rec.radio.amateur.homebrew From: Straydog Subject: Re: Inadvertant mixing -- what was I hearing? Date: Tue, 26 Jul 2005 19:42:54 -0400 Message-ID: References: (see below) The problem you describe is a nightmare and is not that uncommon but may be very hard to fix. I can only speculate on a few things. One is spurious parasitics (that term covers a lot of situations, including chip behavior that is not part of the specifications). Your oscillator circuit may be oscillating on frequecies (self modulation of the fundamental by the non-fundamental or harmonics and mixing, too?) other than the crystal fundamental. Yes, the mixing could be in your test apparatus other than the test oscillator. Sometimes if you get the receiver hundreds of feet away from the oscillator, then the spurious signals fade out faster. Another way to approach this might be if you use a different receiver (different local oscilator freq, different IF) and see if you pick up the same sets of signals. How about what do you get when you try different crystals? Similar spurious emissions? Try this if you can and tell us what you get. Do you have a _good_ crystal that you know oscillates and know what its frequency is and put that into your test circuit. Does it behave as you expect? I also know and have had crystals that will oscillate in one oscillator circuit but will not oscillate in others. Also, some crystals will NOT oscillate on their fundamental but _will_ oscillate on one or more of their harmonics. Weird but true. ===== no change to below, included for reference and context ===== On Mon, 25 Jul 2005, Ben Jackson wrote: > I got a bunch of identically (but cryptically) marked crystals that I > wanted a ballpark idea about so I built the oscillator part of the Pixie > II (up to Q1) and put a scope on it. It was around 20MHz, so I grabbed > my HT and tuned around 20MHz to see if I could find it (this, by the > way, is why you should not borrow the lcd display from your frequency > counter for another project...). What I discovered was several signals > above 20MHz (eg 21.040) that only existed when the oscillator was on. > I assumed it was picking up something else and mixing it with 20MHz so > I tried to find the original signals at 1040kHz but I couldn't. The > "mixed" signals were very clear and strong. It was some kind of news > (shortwave?) in an Asian language. > > Where else should I have looked for the base signal? ~41MHz would be > in the middle of a government band. > > -- > Ben Jackson > > http://www.ben.com/ > Article: 93826 of rec.radio.amateur.homebrew From: Straydog Subject: Re: What would cause the SWR to go up drastically when I turn my Date: Tue, 26 Jul 2005 19:46:56 -0400 Message-ID: References: Thanks for sharing your results with the rest of us. That's a good experiment you described. The only "final clincher" would be if you had a receiver that covered the spectrum where you might find out what the spurious signal was that was being generated. Most power transistor circuits I've seen have all kinds of weird bypassing, ferrite beads on power-carrying lines, funny adjustable variable capacitors in funny places in the circuit. Good luck otherwise. ===== no change to below, included for reference and context ===== On Mon, 25 Jul 2005, Joeseph wrote: > On Fri, 15 Jul 2005 19:12:06 +0000 (UTC), "Reg Edwards" > wrote: > >> To think in terms of SWR readings is a waste of time and effort. >> >> You are all confusing yourselves. Furiously digging yourselves even >> further into the mire. >> >> Go back to square one and begin again from Ohm's Law. >> ---- >> Reg >> > > Actually they are correct. I ran an experiment using a Barker and > Williamson low pass filter with a 32 MHz cutoff. > > With the set-up below the SWR went high when the amp was turned on. > > RADIO===>AMP===>SWR METER====>ANTENNA > > With the set-up below the SWR stayed at 1.1:1 with and without the amp > on. > > RADIO===>AMP===>LOW PASS FILTER===>SWR METER===>ANTENNA > > Also the output of the amp showed about 110 watts without the low pass > filter, but with the low pass filter the watt meter installed after > the low pass filter showed about 75 watts. That means about 30 watts > was being transmitted above 30 MHz even through the fundamental was at > 28 MHz. > > I doubled the value of the capacitors going form the collector to > ground, and the SWR dropped to 1.5:1 with the amp on and 1.1:1 with > the amp off. Then I add 470 pf capacitors from the trasnsitor base to > ground and the SWR with the amp dropped to 1.3:1 with the amp on. > With the TVI filter in-line the SWR is 1.1:1 with and without the amp > on. > > A lack of working space inside the amp case made it difficult to > install a pi-network on the input and output side of the transistor > finals. > > Thanks for everyone's help. The SWR increased was caused by harmonics > above the fundamental frequency, and they were outside the bandwidth > of the antenna. > > Article: 93827 of rec.radio.amateur.homebrew Date: Wed, 27 Jul 2005 00:45:24 -0400 From: -ex- Subject: Re: TS-120 References: <1122436871.721180.79260@o13g2000cwo.googlegroups.com> Message-ID: <6b55f$42e71167$4232bd8d$9704@COQUI.NET> pdrunen@aol.com wrote: > Hi all, > > I have a TS-120 > > The 120 has a cal signal knob, I put the cal signal out on 14.2 MHz and > get S-3, on the 21.2, it back up to S-7. The best output is at 29.2 > with a little over S-9. > > I don't understand why it takes a dip in the 20 meter and in the JJY > band, since JJY band is for WWV at 15 MHz just above the 20 meter band > then it would use some of the same circuits. > It emitted smoke while > listening in the 20 meter band but not in the other bands. > > As far as using a signal generator, I have a wavetek 3001, I could > determine a signal down to about -100dbm on 20 meters and down to about > -110 dbm on 15 meters. That "smoke" part is very indicative of something wrong and should be a good lead for troubleshooting! -BM Article: 93828 of rec.radio.amateur.homebrew Date: Wed, 27 Jul 2005 08:35:45 +0200 From: PaoloC Subject: Re: BF0 Circuit References: <1122315009.889610.131090@g14g2000cwa.googlegroups.com> <42e5eca9_2@x-privat.org> <1122436006.465883.211290@z14g2000cwz.googlegroups.com> Message-ID: <42e72ae1$1_2@x-privat.org> pdrunen@aol.com wrote: 'morning > I took a look, the circuit looks good, so why the better method > comment? Well, at that time I wanted to experiment how ceramic filters worked, so I built a very low frequency oscillator and filtered out the wanted signal near 455k. There is also a slight overhead using just 1/6th of a TTL chip! Subsequent studies and experiments taught me that an RC oscillator can be sufficiently stable at those frequencies. I believe a 455k RC oscillator can be built right away. > If this 455KHz injected "over the air" signal is captured by the > receiver, should the s-meter provide a constant signal level? I experimented the external BFO only on those cheap multiband SW radios, and they have no s-meter. Moreover I am personally not too interested in meter reading unless I am measuring something (ie difference between two signals). I prefer to evaluate a signal by ear. If you need/want to rely on meter readings, remember that an additional BFO will give you AM->DSB, while you'll be listening to a SSB signal. That's half power, the meter should read 3dB less than actual strength (half point?!). > If the SSB signal is coming in strong (S9), and the captured BFO level > is S3, will the amplitude of the BFO have to be increased? I do not remember having to deal with BFO amplitude. In "complex" receivers there might be some implications with AGC, especially if it follows the 455k mixer (doubt so, it is probably after the 1st conversion). Assuming the AGC on the 1st IF, then the 455k IF signal level is rather constant, so BFO amplitude should not need adjustments. > How about AGC on the BFO so that its injection level is a function of > signal level? That is becoming too complex for a simple solution, IMHO. :-) Let us know how you decided to proceed and how it worked. Greetings from the other side of the Atlantic (and a bit of Mediterranean as well), Paolo IK1ZYW Article: 93830 of rec.radio.amateur.homebrew Date: Wed, 27 Jul 2005 05:44:15 -0400 From: -ex- Subject: Re: TS-120 References: <1122436871.721180.79260@o13g2000cwo.googlegroups.com> <6b55f$42e71167$4232bd8d$9704@COQUI.NET> <1122455645.302349.82760@g44g2000cwa.googlegroups.com> Message-ID: Andrew VK3BFA wrote: > Erk - hi all, > > you need to get a very basic book on radios, and read up the theory - > it will improve your fault finding no end. (probably mid 70's ARRL > handbook would be a good primer) > > The sig gen is irrelevant at this stage - you have already proved that > by observation of the S meter during Cal (thats one of its functions > along with calibrating frequency) > > Also, unconnected wires and/or smoke are a basic radio no no. > > This is going to be hard --- to try and fix a radio by remote > control, but will give it a try if you want to persevere. > > 73 de VK3BFA Andrew I'm not so sure that any book would help with a specific model problem. After all, the OP is a licensed ham wih a callsign and *should* be savvy enough to look for where the smoke came from. At this point of troubleshooting it would seem that OP would be equally served with a book on "Olifactory Recognition" inasmuch as an electronics book. One cannot simply read a 30 year old ARRL Handbook and fix a complicated modern radio. -Bill Article: 93831 of rec.radio.amateur.homebrew From: "Heriberto" References: <1122315009.889610.131090@g14g2000cwa.googlegroups.com> <42e5eca9_2@x-privat.org> <1122436006.465883.211290@z14g2000cwz.googlegroups.com> Subject: Re: BF0 Circuit Date: Wed, 27 Jul 2005 13:00:49 -0300 Message-ID: <42e7ad1c_3@x-privat.org> Hi Paul: When BFO is used, then AGC should be derived from audio signal, not a If signal.- REgards Heriberto - escribió en el mensaje news:1122436006.465883.211290@z14g2000cwz.googlegroups.com... > Hi there Paul, > > I took a look, the circuit looks good, so why the better method > comment? > > If this 455KHz injected "over the air" signal is captured by the > receiver, should the s-meter provide a constant signal level? > > If the SSB signal is coming in strong (S9), and the captured BFO level > is S3, will the amplitude of the BFO have to be increased? > > How about AGC on the BFO so that its injection level is a function of > signal level? > > Thanks again for the information! > Article: 93832 of rec.radio.amateur.homebrew Date: Wed, 27 Jul 2005 18:50:12 -0400 From: -ex- Subject: Re: Simple questions on receivers References: <1121199166.494373.59190@g49g2000cwa.googlegroups.com> <1121402521.763416.59680@z14g2000cwz.googlegroups.com> <3ab17$42d74ce4$4232bd6a$15556@COQUI.NET> <1121640125.959490.41200@g47g2000cwa.googlegroups.com> <50c4f$42daf364$4232bd1b$8913@COQUI.NET> <1121799542.755969.248720@o13g2000cwo.googlegroups.com> <1121889338.699737.244800@g43g2000cwa.googlegroups.com> <1121892299.067606.143910@z14g2000cwz.googlegroups.com> <1122503523.087785.121500@o13g2000cwo.googlegroups.com> Message-ID: <3bab2$42e80fa8$4232bdf5$9045@COQUI.NET> dave.harper wrote: > K7ITM wrote: > > >>There is such a thing as TOO HIGH a loaded Q. Let's say you start off >>with a coil with unloaded Q of 500, and couple lightly to it with your >>circuit (antenna and detector), so the loaded Q is 250. That means the >>bandwidth at 3dB points, if you tune a station at 1MHz, is 4000Hz. If >>you've tuned to the center of the station, your demodulated bandwidth >>will be only 2kHz. Since the rolloff is gradual with a single-tuned >>circuit, voice should be OK, but you'll be missing out on a lot of the >>highs. (Mind you, it's not easy at all to get an unloaded Q of 500 at >>1MHz!) > > > Ok, I'm back with a couple more questions, since y'all are so > informative... I know it's not a true xtal set if I add an amp, but > wouldn't the best way to minimize the drop between the unloaded and > loaded Q be to add an amp? With a transistor/op amp, it seems that you > could tailor the load imposed on the tank circuit so that it's minimal, > while it seems a headphone load would be pretty significant (depending > on the headphone)...? In my set I simply use an audio matching xfmr. I'm using sound-powered phones which are in the 200 ohm impedance range, and around 50 ohms DC. A little xfmr like the Calrad 45-700 is a good choice. Some of the guys use a switchable matchbox using a tapped xfmr like the Bogen. You can see some of these at http://www.crystalradio.net/ As for an amp...mine plays great into my computer's sound card! I tried a little one chip amp but it only had about 20db of gain which isn't really enough to do a lot of good. -Bill Article: 93833 of rec.radio.amateur.homebrew From: Tim Wescott Subject: MSK Demodulator Date: Wed, 27 Jul 2005 22:54:05 -0700 Message-ID: <11egsnuhtlhtu49@corp.supernews.com> I've seen a number of inquiries about minimum shift keying, it's generation and demodulation. I haven't been able to find anything to recommend on the web, which is frustrating since I built a MSK receiver for my Master's thesis about 15 years ago. So I've posted my Master's thesis. It goes into some detail about MSK, it's generation and demodulation. It also goes into some detail about maritime DGPS data link requirements which I assume no one cares about -- but it's there if you do. Thanks go to Joel Kolstad, KE7CDV, for scanning 88 pages from a bound book and making them look good enough to post without embarrasement. http://www.wescottdesign.com/articles/MSK/mskTop.html -- Tim Wescott Wescott Design Services http://www.wescottdesign.com Article: 93834 of rec.radio.amateur.homebrew Date: Thu, 28 Jul 2005 08:55:57 +0200 From: PaoloC Subject: Re: MSK Demodulator References: <11egsnuhtlhtu49@corp.supernews.com> Message-ID: <42e88119$1_2@x-privat.org> Tim Wescott wrote: > I've seen a number of inquiries about minimum shift keying, it's [...] > So I've posted my Master's thesis. It goes into some detail about MSK, > it's generation and demodulation. It also goes into some detail about > maritime DGPS data link requirements which I assume no one cares about Thank you for sharing with the World your work, Tim! It will be a pleasant Summer reading! Paolo IK1ZYW Article: 93835 of rec.radio.amateur.homebrew From: John - KD5YI Subject: Re: MSK Demodulator References: <11egsnuhtlhtu49@corp.supernews.com> Message-ID: <6z%Fe.7987$mU3.3330@trnddc02> Date: Thu, 28 Jul 2005 07:12:02 GMT Tim Wescott wrote: > I've seen a number of inquiries about minimum shift keying, it's > generation and demodulation. I haven't been able to find anything to > recommend on the web, which is frustrating since I built a MSK receiver > for my Master's thesis about 15 years ago. > > So I've posted my Master's thesis. It goes into some detail about MSK, > it's generation and demodulation. It also goes into some detail about > maritime DGPS data link requirements which I assume no one cares about > -- but it's there if you do. > > Thanks go to Joel Kolstad, KE7CDV, for scanning 88 pages from a bound > book and making them look good enough to post without embarrasement. > > http://www.wescottdesign.com/articles/MSK/mskTop.html > Hi, Tim - There was an article in the January 2003 issue of Circuit Cellar by Tom Napier concerning MSK. See http://www.circuitcellar.com/magazine/150toc.htm to purchase the article. Other than this, I've not seen anything on the Web either. Cheers, John Article: 93836 of rec.radio.amateur.homebrew From: Terry Given Subject: Re: MSK Demodulator References: <11egsnuhtlhtu49@corp.supernews.com> Message-ID: Date: Thu, 28 Jul 2005 22:46:05 +1200 Tim Wescott wrote: > I've seen a number of inquiries about minimum shift keying, it's > generation and demodulation. I haven't been able to find anything to > recommend on the web, which is frustrating since I built a MSK receiver > for my Master's thesis about 15 years ago. > > So I've posted my Master's thesis. It goes into some detail about MSK, > it's generation and demodulation. It also goes into some detail about > maritime DGPS data link requirements which I assume no one cares about > -- but it's there if you do. > > Thanks go to Joel Kolstad, KE7CDV, for scanning 88 pages from a bound > book and making them look good enough to post without embarrasement. > > http://www.wescottdesign.com/articles/MSK/mskTop.html > Thanks Tim, thats a nice looking thesis, I look forward to reading it. I'd post mine, but I never got past Ch3 :( (because somebody offered me way too much $$$ :) Three cheers for Joel, its not the first time he's done this :) Cheers Terry Article: 93858 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: A F.A.Q - What is Ham Radio? Date: Sat, 30 Jul 2005 11:40:09 +0100 Message-ID: References: <42ea6a5d_3@x-privat.org> <789le153hl5o098mk8b5i5cr1ha2fik01i@4ax.com> On Fri, 29 Jul 2005 23:44:27 +0100, "huLLy" wrote: > >Hello, bully boy Super Sam. > >Hows about you starting a radio related thread? No? Thought not! > That would be a waste of time. UKRA is now full of lazy-arsed Class B's and low-life dross with M3 licenses. I need no lessons in radio from a G7 CBr who is ashamed of his own call sign and has to use someone elses. Article: 93859 of rec.radio.amateur.homebrew From: "CanAiry" References: <42ea6a5d_3@x-privat.org> <789le153hl5o098mk8b5i5cr1ha2fik01i@4ax.com> Subject: Re: A F.A.Q - What is Ham Radio? Date: Sat, 30 Jul 2005 11:45:21 +0100 Message-ID: <42eb59e2$1_1@x-privat.org> "Spike" wrote in message news:b9ele11271phdb27op6r9ofkmh2dsbolos@4ax.com... > Is he back again? It will only be a matter of time before someone catches up with him, he learnt nothing during his absence. Article: 93860 of rec.radio.amateur.homebrew From: "Polymath" Subject: Postage-stamp sized radio? Date: Sat, 30 Jul 2005 13:10:15 +0100 Message-ID: <42eb6dcd_1@x-privat.org> Having currently employment within a Japanese manufacturer of WCDMA mobile phones and thus being exposed to the "Innards" of such phones; following the historical challenges of making a transceiver that would fit into a tobacco tin, is it perhaps now the time to issue a challenge to come up with a complete transceiver design fabricated to the size of a postage stamp? Some of the circuits that I am engaged in testing have components that are smaller than the smallest blob of solder I can melt! Perhaps it is time to extend my soldering iron with a tip fashioned >from a dressmaker's pin? Article: 93861 of rec.radio.amateur.homebrew From: "CanAiry" References: <42eb6dcd_1@x-privat.org> Subject: Re: Postage-stamp sized radio? Date: Sat, 30 Jul 2005 13:47:46 +0100 Message-ID: <42eb768f$1_3@x-privat.org> "Polymath" wrote in message news:42eb6dcd_1@x-privat.org... > Having currently employment Ahh a rehab course Article: 93862 of rec.radio.amateur.homebrew From: "Steve H" References: <42eb6dcd_1@x-privat.org> Subject: Re: Postage-stamp sized radio? Date: Sat, 30 Jul 2005 14:12:03 +0100 Message-ID: <42eb7d75$1_3@mk-nntp-2.news.uk.tiscali.com> http://www.amqrp.org/kits/smk1/ latest sm components are smaller so I can't see why not, but what's the point? Steve H Real radios glow in the dark.... "Polymath" wrote in message news:42eb6dcd_1@x-privat.org... > Having currently employment within a Japanese manufacturer of > WCDMA mobile phones and thus being exposed to the "Innards" of > such phones; following the historical challenges of making a transceiver > that would fit into a tobacco tin, is it perhaps now the time to > issue a challenge to come up with a complete transceiver design > fabricated to the size of a postage stamp? > > Some of the circuits that I am engaged in testing have components > that are smaller than the smallest blob of solder I can melt! > > Perhaps it is time to extend my soldering iron with a tip fashioned > from a dressmaker's pin? > > Article: 93863 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: A F.A.Q - What is Ham Radio? Date: Sat, 30 Jul 2005 16:23:20 +0100 Message-ID: <1q6ne1ds2ds86e7u7n6hctoppgg6j269u8@4ax.com> References: <42ea6a5d_3@x-privat.org> <789le153hl5o098mk8b5i5cr1ha2fik01i@4ax.com> <42eb59e2$1_1@x-privat.org> On Sat, 30 Jul 2005 11:45:21 +0100, "CanAiry" wrote: >It will only be a matter of time before someone catches up with him, he >learnt nothing during his absence. > Let's hope that Frank doesn't set the dog on me. Article: 93864 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: A F.A.Q - What is Ham Radio? Date: Sat, 30 Jul 2005 16:25:10 +0100 Message-ID: References: <42ea6a5d_3@x-privat.org> <789le153hl5o098mk8b5i5cr1ha2fik01i@4ax.com> On Sat, 30 Jul 2005 11:58:55 +0100, "huLLy" wrote: >> On Fri, 29 Jul 2005 23:44:27 +0100, "huLLy" wrote: >> >> >>> >>> Hello, bully boy Super Sam. >>> >>> Hows about you starting a radio related thread? No? Thought not! >>> >> >> >> That would be a waste of time. UKRA is now full of lazy-arsed Class >> B's and low-life dross with M3 licenses. >> I need no lessons in radio from a G7 CBr who is ashamed of his own >> call sign and has to use someone elses. > >Then what, pray, are you doing here? Clearly you seem to need some form of >association with the very people you mention. Either that or because school >is out for the holidays you can't steal little boys pocket money? > Thank you for confirming my observations. My aim is to drive them all back onto 27MHz. Why don't you make a start and bugger off back there and leave us radio amateurs to do real radio work. Article: 93865 of rec.radio.amateur.homebrew From: fmmck@aol.com (Fred McKenzie) Subject: Re: TS-120 Date: Sat, 30 Jul 2005 11:49:50 -0400 Message-ID: References: <1122436871.721180.79260@o13g2000cwo.googlegroups.com> <1122727352.194993.130220@o13g2000cwo.googlegroups.com> In article <1122727352.194993.130220@o13g2000cwo.googlegroups.com>, "Andrew VK3BFA" wrote: > Fred - its irrelevant here - you are quite correct, but its irrelevant > in this context. The S meter on the ts120 shows different readings on > each band on its OWN cal. oscillator. This is what the oscillator is > designed to do (among other things) Andrew- Perhaps I was a little off base. It has been a long time since I had a TS-120S, and I don't recall the calibration oscillator. I loaned the service manual to someone several years ago, so I can't check it out! Since I wasn't aware of the utility of the calibration oscillator, the only sure evidence of a malfunction was a reference to smoke that seemed unrelated to receiver sensitivity. For what it is worth, there is a service bulletin about replacing an input RF transformer that might have been damaged by static discharge. I don't know if it applies equally to the TS-120 and TS-120S. 73, Fred, K4DII SB-040 TS-120S Ant Input Transformer Replacement 7-12-79 Ts-120S transceivers subject to strong static fields or similar high current atmospheric discharges may suddenly exhibit low RX sensitivity on all bands. TX will be OK. You may suspect T1 on the RF unit X44-1260-01. When replacing or ordering T1, L43-0696-35, also check the value of C20. If it is 33pF, just replace and repeak the transformer. First production transceivers will have a 15pF cap for C20. When changing T1, also replace C20 with a 33pF capacitor, and repeak the circuit. Old part number: L34-0696-05 Antenna Coil New part number: L34-0696-35 Old Capacitor was 15pF, replace with New part number: CC45RH1H330J 33pf Please make these changes in your service manual. JEB/yn (c) 71279TKC Article: 93866 of rec.radio.amateur.homebrew From: Larry Subject: Re: Postage-stamp sized radio? Date: Sat, 30 Jul 2005 10:45:03 -0700 Message-ID: <3l1shbF10knmmU1@individual.net> References: <42eb6dcd_1@x-privat.org> <42eb7d75$1_3@mk-nntp-2.news.uk.tiscali.com> Steve H wrote: > http://www.amqrp.org/kits/smk1/ latest sm components are smaller so I can't > see why not, but what's the point? For mailing a radiogram, perhaps? Package tracking, though RFID seems to the modus praesto. Certainly many sinister reasons exist as well for such a small device. Article: 93867 of rec.radio.amateur.homebrew From: Frank Turner-Smith G3VKI Subject: Re: Postage-stamp sized radio? References: <42eb6dcd_1@x-privat.org> <42eb7d75$1_3@mk-nntp-2.news.uk.tiscali.com> <3l1shbF10knmmU1@individual.net> Message-ID: Date: Sat, 30 Jul 2005 19:00:09 GMT Larry wrote: > Steve H wrote: > >> http://www.amqrp.org/kits/smk1/ latest sm components are smaller so I >> can't >> see why not, but what's the point? > > > For mailing a radiogram, perhaps? Package tracking, though RFID seems > to the modus praesto. > > Certainly many sinister reasons exist as well for such a small device. It can't be smaller than Beanie's brain. -- ;-) 73 de Frank Turner-Smith G3VKI - mine's a pint. http://turner-smith.co.uk Article: 93868 of rec.radio.amateur.homebrew From: "brot" Subject: Re: Postage-stamp sized radio? Date: Sat, 30 Jul 2005 22:35:37 +0100 Message-ID: <3l2a58F10l1o7U1@individual.net> References: <42eb6dcd_1@x-privat.org> "Polymath" wrote in message news:42eb6dcd_1@x-privat.org... > Having currently employment within a Japanese manufacturer of > WCDMA mobile phones and thus being exposed to the "Innards" of > such phones; following the historical challenges of making a transceiver > that would fit into a tobacco tin, is it perhaps now the time to > issue a challenge to come up with a complete transceiver design > fabricated to the size of a postage stamp? Idiot. Article: 93869 of rec.radio.amateur.homebrew From: "Tom Holden" References: <1121989020.770510.116450@g14g2000cwa.googlegroups.com> Subject: Re: CW filter/notch filter Message-ID: Date: Sat, 30 Jul 2005 21:00:52 -0400 "Fred McKenzie" wrote in message news:fmmck-2207051441180001@ac9f4bda.ipt.aol.com... > In article <1121989020.770510.116450@g14g2000cwa.googlegroups.com>, > "K7ITM" wrote: > >>... or just transmit the SSB with a >> suppressed carrier that you don't have to worry about removing.) > > Tom & Sam- > > That is what I was going to suggest. It is a common practice to send a > partially reduced carrier that doesn't eat up a lot of power, but allows > you to synchronize to it using a synchronous detector. > The Canadian time and frequency standard transmitters at 3330 and 7335 kHz are USB with partially reduced carrier. I don't see the point of sending a tone in the middle of the speech spectrum to provide a sync reference when unsuppressing the carrier to some degree is much more economical. Tom Article: 93870 of rec.radio.amateur.homebrew From: "Polymath" References: <42eb6dcd_1@x-privat.org> <3l2a58F10l1o7U1@individual.net> <7fucnWrYhZokkXHfUSdV9g@ptd.net> Subject: Re: Postage-stamp sized radio? Date: Sun, 31 Jul 2005 05:56:04 +0100 Message-ID: <42ec5bf9_2@x-privat.org> Why the attack? Why the _INFANTILE_ attack? It is an unfortunate indication of the extent to which incurable CBers, all those who buy their rigs off-the-shelf and send them back to be repaired, are infesting Ham Radio. I append a short article to assist. "Carl R. Stevenson" wrote in message news:7fucnWrYhZokkXHfUSdV9g@ptd.net... > Why the attack? A postage stamp sized transceiver is certainly quite > feasible with today's technology. It won't be QRO, but an entire > transceiver can be implemented in that size ... do a web search on > "Zigbee" and I'm sure you'll find many examples > > Carl - wk3c > > "brot" wrote in message > news:3l2a58F10l1o7U1@individual.net... >> >> "Polymath" wrote in message >> news:42eb6dcd_1@x-privat.org... >>> Having currently employment within a Japanese manufacturer of >>> WCDMA mobile phones and thus being exposed to the "Innards" of >>> such phones; following the historical challenges of making a transceiver >>> that would fit into a tobacco tin, is it perhaps now the time to >>> issue a challenge to come up with a complete transceiver design >>> fabricated to the size of a postage stamp? >> >> Idiot. >> > 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! Article: 93871 of rec.radio.amateur.homebrew From: "Polymath" References: <42e2b834$1_2@x-privat.org> Subject: Exam Question..... Date: Sun, 31 Jul 2005 06:29:24 +0100 Message-ID: <42ec654d_1@x-privat.org> Because this NG has degenerated into a hotbed of infantile personal remarks made by a number of contributors whose only contribution to technical threads is to sneer, then this NG has ceased to be a forum for Ham Radio and is merely an annexe of the cesspit of the gangrenous degeneration from which M3/CB Fools' Licensees originate. Discuss (10 Marks) Article: 93872 of rec.radio.amateur.homebrew From: "Theo" References: <42eb6dcd_1@x-privat.org> Subject: Re: Postage-stamp sized radio? Message-ID: Date: Sun, 31 Jul 2005 08:46:05 GMT "Polymath" wrote in message news:42eb6dcd_1@x-privat.org... (snip) Perhaps it is time to extend my soldering iron with a tip fashioned from a dressmaker's pin? Well do so - then do us all a favour and stick it up your arse! Article: 93873 of rec.radio.amateur.homebrew From: Frank Turner-Smith G3VKI Subject: Re: Postage-stamp sized radio? References: <42eb6dcd_1@x-privat.org> Message-ID: Date: Sun, 31 Jul 2005 09:11:16 GMT Theo wrote: > "Polymath" wrote in message > news:42eb6dcd_1@x-privat.org... > > (snip) > Perhaps it is time to extend my soldering iron with a tip fashioned > from a dressmaker's pin? > > Well do so - then do us all a favour and stick it up your arse! > > > > Then, and only then, switch it on. -- ;-) 73 de Frank Turner-Smith G3VKI - mine's a pint. http://turner-smith.co.uk Article: 93874 of rec.radio.amateur.homebrew From: Frank Turner-Smith G3VKI Subject: Re: Exam Question..... References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> Message-ID: Date: Sun, 31 Jul 2005 09:18:15 GMT Poly no maths wrote: < crap snipped > > Discuss (10 Marks) > > T'was on the good ship Beanus, my God, you should have seen us. The figurehead was a sheep in bed sucking old Airy's p***s. Discuss (11 Marks) Article: 93875 of rec.radio.amateur.homebrew From: Spike Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 11:00:20 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> Frank Turner-Smith G3VKI wrote: >PolyMouthth wrote: > >< crap snipped > > >> Discuss (10 Marks) >> > >T'was on the good ship Beanus, >my God, you should have seen us. > >Discuss (11 Marks) Wait a minute. Wasn't this the chap who came on here threatening people with legal action if they failed to preserve his anonymity? And then went on to post a poem referring to himself, in which he was addressed as 'Gareth', who seemed to live in Wiltshire, and seemed know to the police? from Aero Spike Article: 93876 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 11:13:19 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> On Sun, 31 Jul 2005 09:18:15 GMT, Frank Turner-Smith G3VKI wrote: >Poly no maths wrote: >< crap snipped > >> Discuss (10 Marks) >> >> >T'was on the good ship Beanus, >my God, you should have seen us. >The figurehead was a sheep in bed >sucking old Airy's p***s. > >Discuss (11 Marks) Low-life scum. Article: 93877 of rec.radio.amateur.homebrew From: "MW0GUV" Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 12:01:22 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> "huLLy" wrote in message news:9_GdnfA6L6mHOHHfRVn-oQ@giganews.com... > Bullyboy Nedlar wrote in message Message-ID: > > > Low-life scum. > > Nedlar, you need a Taser to the testes, the shock might bring you up from > the bullyboy swamp into the human race. > > He's not a bully, he is just a gutless wan*er who snipes from behind his keyboard. I'd love to see what he would do face to face with any of the people he insists on having a pop at Andy MW0GUV Article: 93878 of rec.radio.amateur.homebrew From: Frank Turner-Smith G3VKI Subject: Re: Exam Question..... References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> Message-ID: Date: Sun, 31 Jul 2005 12:00:27 GMT Spike wrote: > Frank Turner-Smith G3VKI wrote: > > >>PolyMouthth wrote: >> >>< crap snipped > >> >>>Discuss (10 Marks) >>> >> >>T'was on the good ship Beanus, >>my God, you should have seen us. >> >>Discuss (11 Marks) > > > Wait a minute. > > Wasn't this the chap who came on here threatening people with legal > action if they failed to preserve his anonymity? > > And then went on to post a poem referring to himself, in which he was > addressed as 'Gareth', who seemed to live in Wiltshire, and seemed > know to the police? > > from > Aero Spike The very same, and line 2 of Polymath's posts of 10:54 and 10:58 yesterday under the title "Brian Reay's Legacy" reads:- "Copyright © 10th May 2005 By Gareth Alun Evans" Is he now going to bring a case against himself? I'd love to be in Court for the hearing! -- ;-) 73 de Frank Turner-Smith G3VKI - mine's a pint. http://turner-smith.co.uk Article: 93879 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 13:59:43 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> On Sun, 31 Jul 2005 11:17:08 +0100, "huLLy" wrote: >Bullyboy Nedlar wrote in message Message-ID: > >> Low-life scum. > >Nedlar, you need a Taser to the testes, the shock might bring you up from >the bullyboy swamp into the human race. > More low-life scum. Article: 93880 of rec.radio.amateur.homebrew From: Nedlar > Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 14:00:39 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> On Sun, 31 Jul 2005 12:01:22 +0100, "MW0GUV" wrote: >He's not a bully, he is just a gutless wan*er who snipes from behind his >keyboard. I'd love to see what he would do face to face with any of the >people he insists on having a pop at > >Andy MW0GUV > You'd shit yourself , Sonny. Article: 93881 of rec.radio.amateur.homebrew From: "MW0GUV" Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 14:14:54 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> "Nedlar >" wrote in message news:hqipe1lngiajulmtur519rvn1sn4q5tvkc@4ax.com... > On Sun, 31 Jul 2005 12:01:22 +0100, "MW0GUV" wrote: > > > >He's not a bully, he is just a gutless wan*er who snipes from behind his > >keyboard. I'd love to see what he would do face to face with any of the > >people he insists on having a pop at > > > >Andy MW0GUV > > > > You'd shit yourself , Sonny. Easily proven Andy MW0GUV Article: 93882 of rec.radio.amateur.homebrew From: Spike Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 15:11:39 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> huLLy wrote: >Nedlar, the playground bully, wrote in message: > >Message-ID: > >---- Original Message ---- >From: "Nedlar >" >Newsgroups: uk.radio.amateur,rec.radio.amateur.homebrew >Sent: Sunday, July 31, 2005 2:00 PM >Subject: Re: Exam Question..... > >> You'd shit yourself , Sonny. > >Only 'low life scum' would respond like that. Taken time out from stealing >gob-stoppers from kids smaller than yourself to type that, have you? > Is the remark quoted part of the international tradition of gentlemanly behaviour that we are told is so much a part of 'ham radio', whatever that is? Seems to be a hobby for strange people. from Aero Spike Article: 93883 of rec.radio.amateur.homebrew From: Larry Subject: Re: Postage-stamp sized radio? Date: Sun, 31 Jul 2005 07:34:23 -0700 Message-ID: <3l45nsF10j9k8U2@individual.net> References: <42eb6dcd_1@x-privat.org> <3l2a58F10l1o7U1@individual.net> <7fucnWrYhZokkXHfUSdV9g@ptd.net> <42ec5bf9_2@x-privat.org> Polymath wrote: > Why the attack? Does it matter? Killfile them and move on; they are worth no more effort or attention and are never deserved of any response. 73 N1POP Article: 93884 of rec.radio.amateur.homebrew From: Allodoxaphobia Subject: Re: Postage-stamp sized radio? Date: 31 Jul 2005 15:43:09 GMT Message-ID: References: <42eb6dcd_1@x-privat.org> <3l2a58F10l1o7U1@individual.net> <7fucnWrYhZokkXHfUSdV9g@ptd.net> <42ec5bf9_2@x-privat.org> <3l45nsF10j9k8U2@individual.net> On Sun, 31 Jul 2005 07:34:23 -0700, Larry wrote: > Polymath wrote: >> Why the attack? > > Does it matter? Killfile them and move on; they are worth no more > effort or attention and are never deserved of any response. Well, certsinly killfile any crosspostings that include uk.radio.amateur. That seems to be where the major sewage leaks are coming from. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux Pueblo, Colorado | @ | Jonesy | OS/2 __ 38.24N 104.55W | config.com | DM78rf | SK Article: 93885 of rec.radio.amateur.homebrew From: "Polymath" References: <42eb6dcd_1@x-privat.org> <3l2a58F10l1o7U1@individual.net> <7fucnWrYhZokkXHfUSdV9g@ptd.net> <42ec5bf9_2@x-privat.org> <3l45nsF10j9k8U2@individual.net> Subject: Re: Postage-stamp sized radio? Date: Sun, 31 Jul 2005 16:50:12 +0100 Message-ID: <42ecf2d3_1@x-privat.org> The remark from a Yank indicates the state of play in Britland.... "Allodoxaphobia" wrote in message news:slrndepscd.kog.bit-bucket@shell.config.com... > On Sun, 31 Jul 2005 07:34:23 -0700, Larry wrote: >> Polymath wrote: >>> Why the attack? >> >> Does it matter? Killfile them and move on; they are worth no more >> effort or attention and are never deserved of any response. > > Well, certsinly killfile any crosspostings that include uk.radio.amateur. > That seems to be where the major sewage leaks are coming from. > > Jonesy > -- > Marvin L Jones | jonz | W3DHJ | linux > Pueblo, Colorado | @ | Jonesy | OS/2 __ > 38.24N 104.55W | config.com | DM78rf | SK Article: 93886 of rec.radio.amateur.homebrew From: Richard <"\"delete.this.\"rf.gillette"@ieee.org> Subject: Parts at Hamfests Message-ID: Date: Sun, 31 Jul 2005 16:53:38 GMT At Midwest hamfests there is a guy that has a large collection of semiconductors. Anybody know his name or email address? Article: 93887 of rec.radio.amateur.homebrew From: Frank Turner-Smith G3VKI Subject: Re: Exam Question..... References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> Message-ID: <5t7He.18688$Fx3.3585@newsfe7-gui.ntli.net> Date: Sun, 31 Jul 2005 17:00:49 GMT Nedlar On Sun, 31 Jul 2005 12:01:22 +0100, "MW0GUV" wrote: > > > >>He's not a bully, he is just a gutless wan*er who snipes from behind his >>keyboard. I'd love to see what he would do face to face with any of the >>people he insists on having a pop at >> >>Andy MW0GUV >> > > > You'd shit yourself , Sonny. He'd more likely piss himself laughing. -- ;-) 73 de Frank Turner-Smith G3VKI - mine's a pint. http://turner-smith.co.uk Article: 93888 of rec.radio.amateur.homebrew From: "MW0GUV" Subject: Re: Exam Question..... Date: Sun, 31 Jul 2005 18:19:56 +0100 Message-ID: References: <42e2b834$1_2@x-privat.org> <42ec654d_1@x-privat.org> <9_GdnfA6L6mHOHHfRVn-oQ@giganews.com> <5t7He.18688$Fx3.3585@newsfe7-gui.ntli.net> "Frank Turner-Smith G3VKI" wrote in message news:5t7He.18688$Fx3.3585@newsfe7-gui.ntli.net... > Nedlar > On Sun, 31 Jul 2005 12:01:22 +0100, "MW0GUV" wrote: > > > > > > > >>He's not a bully, he is just a gutless wan*er who snipes from behind his > >>keyboard. I'd love to see what he would do face to face with any of the > >>people he insists on having a pop at > >> > >>Andy MW0GUV > >> > > > > > > You'd shit yourself , Sonny. > He'd more likely piss himself laughing. > -- > ;-) > 73 de Frank Turner-Smith G3VKI - mine's a pint. > http://turner-smith.co.uk I can just see him now, he arrives for the square up with the ultimate defence.....A keyboard to hide behind ;0) Andy MW0GUV Article: 93889 of rec.radio.amateur.homebrew From: "EL84" Subject: Re: Postage-stamp sized radio? Date: Sun, 31 Jul 2005 19:13:19 +0100 Message-ID: <3l4im0F10s9poU1@individual.net> References: <42eb6dcd_1@x-privat.org> <3l2a58F10l1o7U1@individual.net> <7fucnWrYhZokkXHfUSdV9g@ptd.net> <42ec5bf9_2@x-privat.org> "Polymath" wrote in message news:42ec5bf9_2@x-privat.org... > I append a short article to assist. > > > What is Ham Radio? (needle stuck again, repetition removed) did you not pick up any new material from your cell wall, or were you too busy biting your pillow? Article: 93901 of rec.radio.amateur.homebrew From: "Harry L" Subject: Re: Postage-stamp sized radio? Date: Mon, 1 Aug 2005 16:11:31 +0200 Message-ID: References: <42eb6dcd_1@x-privat.org> > ... is it perhaps now the time to > issue a challenge to come up with a complete > transceiver design > fabricated to the size of a postage stamp? If car manufacturers had miniaturized their products in the same eay electronics has shrunk, then the modern motor car would fit ont he head of a pin. The only problem is who would drive it? The knobs and pushy-things would be too small to get hold of, or have you a solution for that, such as a big remote control? Article: 93921 of rec.radio.amateur.homebrew From: "clfe" References: <79551$42ee93bb$4232bd9c$16599@COQUI.NET> Subject: Re: SPAM Message-ID: Date: Mon, 1 Aug 2005 18:15:03 -1200 "-ex-" wrote in message news:79551$42ee93bb$4232bd9c$16599@COQUI.NET... > clfe wrote: > >> Damned, what's up with all the Spam???????? >> >> > Lou, > > Its coming out of an ISP in Spain. Must have been hijacked. > > -BM WOW.......... man that is as bad as I think I've ever seen it for "one" newsgroup. At least the only one I seen it in. I too blocked the sender. clf Article: 93922 of rec.radio.amateur.homebrew From: "N9WOS" References: Subject: Re: VFD as an audio/RF amplifier? Message-ID: Date: Tue, 02 Aug 2005 01:19:49 GMT > > It's fun to wave a magnet around a VFD. I bet you could make a fairly > sensitive magnetic-field detector from one. > > John > The best way I could think of doing that is feeding an AC signal through the filaments so that they distort in some way when in the presence of a magnetic field, then monitor the electrode current in some way to determine the amount of filament displacement that is happening. That would give you an indication of magnetic polarity, and intensity. Second idea. Just have one grid positively biased, and monitor the current of just two anodes behind it. When the electrons move through the magnetic field, they will be shifted to one side or the other. electrode current will also shift. That would also allow you to determine polarity and intensity. Hmm... The second idea would also work with standard vacuum tubes that have more than one anode. Or even two or more electrodes of any type that is separated from each other by a small amout, that can be used as anodes. The magnetic field would shift the electron flow from one electrode to the other. I'll have to do some experiments on that subject. Article: 93923 of rec.radio.amateur.homebrew From: "Franklin Jennings" Subject: Crystal Shortwave? Message-ID: <1VzHe.1415$jq.1107@bignews3.bellsouth.net> Date: Mon, 1 Aug 2005 21:23:43 -0400 I apologise if this is not the proper group, and will greatly appreciate direction to the proper one. I have just gotten into crystal sets after years away from the electronics feild (studied at Nuke ET "A" School and FC "A" School in the Navy in 1995-1996). I would like to build the EconOceanic at http://antiqueradio.org/econmain.htm but the plans call for a dual vari-cap >from an old superhet (using the RF section and Oscillator sections seperately to tune through the five coil pairs.) But I cannot find this vari-cap anywhere! Here the designer shows the coverage of the various circuits in a graph. I am quite rusty (I never really worked on Comm equipment, I am a gunfire control technician by training) but if I understand this, I should be able to tune all but the lowest frequencies (.50-.75 or so) without the RF section cap (40-460pF). Again, IF I COMREHEND THIS PROPERLY, I should be able to substitute a single 365pF vari-cap for the oscillator section, ommitting the higher RF cap section, and tune all but the lowest BC frequencies. This is fine by me since I live five miles from WSB, the local blowtorch transmitter siting at AM 750. I just wanted to run my plans by the experts before I wind the two biggest coil pairs for this radio. If someone wants to take the time to answer, even via email, I'll be happy to figure out how to ship a 6-pack of homemade apple cider in appreciation. Alternatively, if someone can reccomend a different radio schematic that can tune 5810, 5850, 9955, 9975, and 13615, that too would be appreciated. (The above freqs are for EWTN broadcasts throughout the day and night.) Thanks Franklin Jennings Atlanta,GA