Article: 102601 of rec.radio.amateur.boatanchors From: "Caveat Lector" Subject: Collection of Ham Radio Boat Anchor URL's Message-ID: Date: Sat, 1 Jul 2006 09:42:04 -0700 http://ac6v.com/antique.htm#AHR -- CL -- I doubt, therefore I might be ! Article: 102602 of rec.radio.amateur.boatanchors From: "Brian Hill" Subject: test Message-ID: Date: Sun, 2 Jul 2006 10:23:58 -0500 Article: 102603 of rec.radio.amateur.boatanchors Date: Mon, 03 Jul 2006 10:27:46 -0400 From: K3HVG Subject: RCA Maritime HF Receiver question Message-ID: <6fmdnYWq3o2OtDTZnZ2dnUVZ_vmdnZ2d@adelphia.com> I have acquired an RCA HF receiver that, among other uses, was included with the radio installation on Liberty and Victory ships. The receiver in question is the RCA 8506A, 110AC/DC set. I worked on one of these that was installed in the RCA 4U equipment suite on the Liberty Ship John Brown, in Baltimore and, at the time, was fortunately able to copy all the books. However, unlike the 8506's in the 4U setup, this particular receiver came with a heavy-duty, shielded case and a front panel drilled for a typical Signal Corps (et al) nomenclature plate. The plate is smaller that the commercial RCA plate as seen on the 4U maritime equipment. I've been told that there is a Signal Corps designation for this receiver, R-xxx, and it may have been used on Corps of Engineers sea-going assets? If anyone any the info, I'd appreciate it. This receiver is a bit on the rare side, it would appear. de K3HVG Article: 102604 of rec.radio.amateur.boatanchors From: "Count Floyd" Message-ID: Subject: IF Gain vs. RF Gain Date: Mon, 03 Jul 2006 21:55:04 -0500 I have an HE-10 with an IF Gain control. The manual says to turn it all the way for AM reception. Is this the same thing as an RF gain control? The RF Gain on my Panasonic 2200 controls the sensitivity, and so does the IF gain on the HE-10. So, what is the difference? -- "What do you mean there's no movie?" Article: 102605 of rec.radio.amateur.boatanchors From: et472@FreeNet.Carleton.CA (Michael Black) Subject: Re: IF Gain vs. RF Gain Date: 4 Jul 2006 03:34:30 GMT Message-ID: References: "Count Floyd" (CountFloyd@MonsterChillerHorrorTheater) writes: > I have an HE-10 with an IF Gain control. The manual says to turn it > all the way for AM reception. Is this the same thing as an RF gain > control? The RF Gain on my Panasonic 2200 controls the sensitivity, > and so does the IF gain on the HE-10. So, what is the difference? The manual says "all the way..." what? The HE-10 is a Lafayette cheapie, or is it some comletely other receiver? Because I have a vague idea that the receiver I'm thinking of used regeneration in the IF amplifier to provide a locatl beat oscillator for CW reception. And in that case, varying the IF gain would affect whether or not the stage went into oscillation. RF gain and IF gain will affect things somewhat differently, but not in terms of overall gain. Some receivers may not even have an RF stage. The point is to reduce the overall radio gain (as opposed to audio gain) for various purposes, mostly to prevent overload. A receiver that had both RF and IF gain controls, and I seem to recall that some did, in terms of gain it wouldn't matter which one you played with. But it might matter in crucial issues. If a local station was overloading, reducing RF gain might reduce or eliminate front end overload, because the signal wouldn't get amplified much before there was good selectivity, while if you reduced IF gain for the same signal, it would have no affect because it was the RF stage being overloaded. The real time you'd see much mention of RF or IF gain controls was in dealing with SSB, once it came along. For receivers that had no product detector, you were told to reduce RF gain and then increase audio gain (to compensate for the reduced RF gain, in effect overall gain would remain the same or close to it while the distribution of that gain would change). This was so the incoming signal was weak compared to the receiver's BFO signal, because it needed to be much stronger than the incoming signal in order to properly demodulate the SSB signal. In this case, it wouldn't have mattered whether you had an RF or IF gain control, or which one you used if you had both. Michael Article: 102606 of rec.radio.amateur.boatanchors From: "COLIN LAMB" References: Subject: Re: IF Gain vs. RF Gain Message-ID: Date: Tue, 04 Jul 2006 04:03:50 GMT The He-10 was a pretty good receiver considering the price. It was conventional and did not use a regen if. Perhaps the reason to use full if gain for am would be to allow the s-meter to read accurately and also allow the avc to work effectively. The if gain and the rf gain do basically the same thing. If there are really strong signals, you would like to reduce the gain before the first rf stage to prevent overloading of the rf amp and mixer. However, a gain control in the rf amp can affect noise figure and signal handling. Perhaps the engineers working on it were not satisfied with the signal handling capacity when they changed the parameters of the rf amp with the rf gain control (I suspect that is the reson). Performance would be equivalent to the Hallicrafters SX-99. It was a physical copy of the old S-38. Note that the tube line up shows that remote and semi-remote pentodes were used rather than sharp cutoff, so the radio was designed to perform as well as it could for the price. Colin K7FM Article: 102607 of rec.radio.amateur.boatanchors From: "Count Floyd" Message-ID: Subject: Re: IF Gain vs. RF Gain References: Date: Mon, 03 Jul 2006 23:06:59 -0500 On Tue, 4 Jul 2006 03:34:30 UTC, et472@FreeNet.Carleton.CA (Michael Black) wrote: > "Count Floyd" (CountFloyd@MonsterChillerHorrorTheater) writes: > > I have an HE-10 with an IF Gain control. The manual says to turn it > > all the way for AM reception. Is this the same thing as an RF gain > > control? The RF Gain on my Panasonic 2200 controls the sensitivity, > > and so does the IF gain on the HE-10. So, what is the difference? > > The manual says "all the way..." what? > > The HE-10 is a Lafayette cheapie, or is it some comletely other > receiver? Because I have a vague idea that the receiver I'm thinking > of used regeneration in the IF amplifier to provide a locatl beat > oscillator for CW reception. And in that case, varying the IF gain > would affect whether or not the stage went into oscillation. > > RF gain and IF gain will affect things somewhat differently, but > not in terms of overall gain. Some receivers may not even have an > RF stage. The point is to reduce the overall radio gain (as opposed > to audio gain) for various purposes, mostly to prevent overload. A > receiver that had both RF and IF gain controls, and I seem to recall > that some did, in terms of gain it wouldn't matter which one you played > with. But it might matter in crucial issues. If a local station was > overloading, reducing RF gain might reduce or eliminate front end overload, > because the signal wouldn't get amplified much before there was good > selectivity, while if you reduced IF gain for the same signal, it would > have no affect because it was the RF stage being overloaded. > > The real time you'd see much mention of RF or IF gain controls was > in dealing with SSB, once it came along. For receivers that had no product > detector, you were told to reduce RF gain and then increase audio gain > (to compensate for the reduced RF gain, in effect overall gain would remain > the same or close to it while the distribution of that gain would change). > This was so the incoming signal was weak compared to the receiver's BFO > signal, because it needed to be much stronger than the incoming signal in > order to properly demodulate the SSB signal. In this case, it wouldn't have > mattered whether you had an RF or IF gain control, or which one you used > if you had both. > > Michael Thanks for the reply, yes, this is the Lafayette HE-10, in mint condition, recently recapped and aligned. The manual says to put the IF gain control at maximum for AM reception, and to reduce it if it overloads the receiver. The radio is very sensitive getting really good DX here in South Florida. I was just curious whether the IF gain was similar to the RF gain in my other receivers. The radio also has a BFO pitch control for CW/SSB, and a switch for AVC/MVC/BFO. -- "What do you mean there's no movie?" Article: 102608 of rec.radio.amateur.boatanchors From: et472@FreeNet.Carleton.CA (Michael Black) Subject: Re: IF Gain vs. RF Gain Date: 4 Jul 2006 04:23:15 GMT Message-ID: References: "Count Floyd" (CountFloyd@MonsterChillerHorrorTheater) writes: > Thanks for the reply, yes, this is the Lafayette HE-10, in mint > condition, recently recapped and aligned. The manual says to put the > IF gain control at maximum for AM reception, and to reduce it if it > overloads the receiver. The radio is very sensitive getting really > good DX here in South Florida. > I was just curious whether the IF gain was similar to the RF gain in > my other receivers. The radio also has a BFO pitch control for > CW/SSB, and a switch for AVC/MVC/BFO. > Someone else replied already and said it's not a cheapy, and your description here does not make it sound like such. Of course, now I'm hving a problem picturing which receiver it was. Michael Article: 102609 of rec.radio.amateur.boatanchors From: "Count Floyd" Message-ID: Subject: Re: IF Gain vs. RF Gain References: Date: Mon, 03 Jul 2006 23:58:32 -0500 On Tue, 4 Jul 2006 04:23:15 UTC, et472@FreeNet.Carleton.CA (Michael Black) wrote: > "Count Floyd" (CountFloyd@MonsterChillerHorrorTheater) writes: > > > > Thanks for the reply, yes, this is the Lafayette HE-10, in mint > > condition, recently recapped and aligned. The manual says to put the > > IF gain control at maximum for AM reception, and to reduce it if it > > overloads the receiver. The radio is very sensitive getting really > > good DX here in South Florida. > > I was just curious whether the IF gain was similar to the RF gain in > > my other receivers. The radio also has a BFO pitch control for > > CW/SSB, and a switch for AVC/MVC/BFO. > > > Someone else replied already and said it's not a cheapy, and your > description here does not make it sound like such. Of course, now I'm > hving a problem picturing which receiver it was. > > Michael Michael, It looks like an S-38 on steroids! It has 9 tubes, the familiar half-moon dials, an "S" meter and it has a transformer, not the "hot tail" setup of the old S-38 ( of which I have the C model, fully restored). -- "What do you mean there's no movie?" Article: 102610 of rec.radio.amateur.boatanchors From: "Vlad" Subject: FA: Vintage Ham Radio Transmitter Morrow MB-565, WORKS! Date: 5 Jul 2006 11:03:08 -0700 Message-ID: <1152122588.706280.184970@j8g2000cwa.googlegroups.com> For auction on eBay: Vintage Ham Radio Transmitter Morrow MB-565, WORKS. VGC. Please check: Item number: 290004588596 Tnx, kb9olm Article: 102611 of rec.radio.amateur.boatanchors From: "owen" Subject: Re: Tiger Transmitter G8VB - TR200 Date: 5 Jul 2006 11:45:22 -0700 Message-ID: <1152125122.057266.83650@j8g2000cwa.googlegroups.com> References: <1150562721.145297.189370@y41g2000cwy.googlegroups.com> Hello Roger.....I am interested in the G8VB Transmitter. I used to live near where he (Harold) lived in Middlesex. Please let me know availability and the price you are looking for. Many thanks in advance from Owen, G3NXK./ F5VKR 73. Roger D Johnson wrote: > nm_hereford-family@yahoo.co.uk wrote: > > Hi, > > > > I have a Tiger Transmitter in my garage which needs a new home. > > > > Any one interested. > > > > Neil > > > How many Tigers per Second will it transmit? > > (Sorry, couldn't resist) > > 73, Roger > > -- > Remove tilde (~) to reply > > Remember the USS Liberty (AGTR-5) > http://ussliberty.org/ Article: 102612 of rec.radio.amateur.boatanchors From: nanu Subject: FA: RCA 5763 NOS set of 5 Message-ID: Date: Wed, 05 Jul 2006 20:16:50 GMT Hello All, There is a set of 5 EA. NIB/NOS RCA 5763's available on eBay right now. They were fully tested on a mutual conductance tester and found to be very strong. In case anyone is interested, it is item # 140003439515 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ih=004&item=140003439515&rd=1&sspagename=STRK%3AMESE%3AIT&rd=1 Thanks. Nanu Article: 102613 of rec.radio.amateur.boatanchors From: Bill Mutch Subject: Toshiba RP 2000F BCL Date: Wed, 05 Jul 2006 21:23:17 -0400 Message-ID: Almost a boatanchor! I picked this thing up at a yard sale over the weekend for a couple of dollars. It works! Needs a good cleaning and some TLC. There's a big discrepancy between signals of known freq on all bands and their place on the dial...but all bands have signals. Anyone know where to get an alignment chart for this toy ?? de KC2LVQ Article: 102614 of rec.radio.amateur.boatanchors From: "Vlad" Subject: Re: FA: Vintage Ham Radio Transmitter Morrow MB-565, WORKS! Date: 6 Jul 2006 11:32:06 -0700 Message-ID: <1152210726.001423.184550@m73g2000cwd.googlegroups.com> References: <1152122588.706280.184970@j8g2000cwa.googlegroups.com> Please also check my other auction for the Morrow power supply RTS-600S. (Item number: 290005091511). Vlad, kb9olm ----------------------- Vlad wrote: > For auction on eBay: Vintage Ham Radio Transmitter Morrow MB-565, > WORKS. VGC. > Please check: Item number: 290004588596 > > Tnx, > kb9olm Article: 102615 of rec.radio.amateur.boatanchors From: nc183d@aol.com Subject: Rochester A.W.A. annual swap / meet? Date: 6 Jul 2006 17:14:37 -0700 Message-ID: <1152231277.894566.229050@m79g2000cwm.googlegroups.com> Hi All, I am planning out the late summer / early fall and was wondering if the annual A.W.A . swap / meet in Rochester is worth going to anymore. I haven't been there in a few years and would like to know from those who attend regularly if it is worth the trip and expense. When I attended (and this was in the mid 90's), it was pretty lively with lots of vendors, moderate prices etc.... Should I plan on attending? I mainly look for boatanchors, but will pick up the odd table set and even consider consoles if the price is low enough. rgds, Mark S. Article: 102616 of rec.radio.amateur.boatanchors From: "CSFD" Subject: NEED CA. SWAPFEST INFO..... Message-ID: Date: Fri, 07 Jul 2006 01:16:59 GMT I will be traveling to Southern California for a few months and have been told there are some huge monthly? ham swapfest around the Los Angeles area and possibly around the San Diego area. Any information would be great help. Thank you in advance and please e-mail me at: csfd@hotmail.com Article: 102617 of rec.radio.amateur.boatanchors From: "Caveat Lector" References: Subject: Re: NEED CA. SWAPFEST INFO..... Message-ID: Date: Thu, 6 Jul 2006 19:21:26 -0700 Last heard the So. Cal Ham swap meets were as listed on URL http://www.w6ier.org/index_files/page0004.htm Some more websites to check at URL: http://ac6v.com/sdswap.htm#sdswap Also when you get here, check the phone numbers listed in the URL's above and at URL: http://ac6v.com/sdswap.htm#sdswap -- CL -- I doubt, therefore I might be ! "CSFD" wrote in message news:fCirg.62428$fb2.55329@newssvr27.news.prodigy.net... >I will be traveling to Southern California for a few months and have been > told there are some huge monthly? ham swapfest around the Los Angeles area > and possibly around the San Diego area. > Any information would be great help. > Thank you in advance and please e-mail me at: > csfd@hotmail.com > > Article: 102618 of rec.radio.amateur.boatanchors From: "Craig" Subject: SB-230 saga continues Date: Fri, 7 Jul 2006 00:05:12 -0400 Message-ID: <63287$44addd78$4831d174$8940@FUSE.NET> Well, I finally got around to testing the amp tonight...it doesn't work! < sob > I'm getting 0 plate and 0 grid current and the voltage is jumping straight to full scale (3000 volts instead of the 2400 volts specified in the manual). Any suggestions as to what could be the problem? In poking around, it looks like the zener diode on the rear of the amp might be missing. Could this be causing this behavior? Other parts of the amp appear to work....the meter responds to exciter power, the delay circuit works and the relay is operational. Any help would be appreciated. 73, Craig KB8FGC