[AMRadio] White Face Johnson
On the White Face Johnson, that's cool you found one NIB. I'm sure you'll save all those packing materials and the literature. On selecting a handful of crystals, yes, 29.010, 020, 030 are good starts. Never heard much on 29.000, no particular reason, and there was an Australian station who liked 28.990 and would draw some activity when Cycle 23 was at high tide. In that same period, a group of Collins enthusiasts generally parked on 29.050 during the day weekends (US time) for a domestic AM roundtable, such that it was on ten meters (not everyone could hear everyone). International AM was a few hours before that to Europe, the UK, and scandanavia. I usually parked on 030 to work a fellow in France with whom I became good friends, F5HSH. Here's the sound of what you can look forward to: http://www.amfone.net/audio/F5HSH-DX100%60D104~SP600.wav __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[AMRadio] RCA blower
Rick, You may not need an original type blower in that BTA, and the failure of the one you've got is a chance to cut noise in the room where the transmitter will be located. Since you'll be running voice rather than higher duty cycle music programming, and since transmissions will be intermittent rather than continuous, I'll bet you can operate well within temperature margins on those 4-400s by configuring just about any lower flow blower you have laying around. Despite the original likelihood all 4 tubes would be operating under enough load to have their plates glowing in a broadcast application, RCA didn't even put chimneys on those 4-400s, probably concluding it was adequate to rely only on that blower to move lots of air through the cabinet. Your operating circumstances are far milder. __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [AMRadio] White Face Johnson
Paul, Your excellent recording sounded like a 'closed circuit' connection. What antenna were you using and when do you expect conditions to return to that level of contact? 73, Ken W2DTC -- International AM was a few hours before that to Europe, the UK, and scandanavia. I usually parked on 030 to work a fellow in France with whom I became good friends, F5HSH. Here's the sound of what you can look forward to: http://www.amfone.net/audio/F5HSH-DX100%60D104~SP600.wav
RE: [AMRadio] White Face Johnson
All I can say is WOW... Looking forward...to getting it on the air... Bob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of VJB Sent: Saturday, May 27, 2006 5:27 AM To: amradio@mailman.qth.net Subject: [AMRadio] White Face Johnson On the White Face Johnson, that's cool you found one NIB. I'm sure you'll save all those packing materials and the literature. On selecting a handful of crystals, yes, 29.010, 020, 030 are good starts. Never heard much on 29.000, no particular reason, and there was an Australian station who liked 28.990 and would draw some activity when Cycle 23 was at high tide. In that same period, a group of Collins enthusiasts generally parked on 29.050 during the day weekends (US time) for a domestic AM roundtable, such that it was on ten meters (not everyone could hear everyone). International AM was a few hours before that to Europe, the UK, and scandanavia. I usually parked on 030 to work a fellow in France with whom I became good friends, F5HSH. Here's the sound of what you can look forward to: http://www.amfone.net/audio/F5HSH-DX100%60D104~SP600.wav __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] JOHNSON WHITEFACE
So are you saying like order 3 sets 29,0 and 29.1 and 29.2 ? If I get these can you help me with the mods??? Thanks Rick... Bob I'm still a little corn-fused..are these actually 29 Mhz crystals, or are they some lower frequency that multiplies up like in standard ham gear? I havva white face as well, and one of my favorite activities is 10 meter AM...I wanna join the fun!!! thanks es 73 de Dan -- WAØJRD ..
Re: [AMRadio] JOHNSON WHITEFACE
They are actually 29.* mc crystals. However, the receive crystals is 455 kc lower than the transmit crystals. Rick/K5IZ I'm still a little corn-fused..are these actually 29 Mhz crystals, or are they some lower frequency that multiplies up like in standard ham gear? I havva white face as well, and one of my favorite activities is 10 meter AM...I wanna join the fun!!! thanks es 73 de Dan -- WAØJRD ..
Re: [AMRadio] JOHNSON WHITEFACE
They are actually 29.* mc crystals. However, the receive crystals is 455 kc lower than the transmit crystals. Rick/K5IZ Thanks Rick!
Re: [AMRadio] RCA blower
Thanks for the tips, Paul. There is no doubt the service will be considerably lighter than its original application and likely I could get by with less air flow. I'd just like to get it back close to original if possible. I will be looking for a quieter blower, no doubt. However, I've been searching for that elusive quiet blower for some time for my 3K Premier and have yet to find it. Most likely I'll remote the transmitter, so noise won't be too big of an issue. I'd love to have it right here in the shack so I could watch those beautiful 4-400's glow, but I'll probably have to forfeit that. Thanks and 73, Rick/K5IZ VJB wrote: Rick, You may not need an original type blower in that BTA, and the failure of the one you've got is a chance to cut noise in the room where the transmitter will be located. Since you'll be running voice rather than higher duty cycle music programming, and since transmissions will be intermittent rather than continuous, I'll bet you can operate well within temperature margins on those 4-400s by configuring just about any lower flow blower you have laying around. Despite the original likelihood all 4 tubes would be operating under enough load to have their plates glowing in a broadcast application, RCA didn't even put chimneys on those 4-400s, probably concluding it was adequate to rely only on that blower to move lots of air through the cabinet. Your operating circumstances are far milder.
[AMRadio] 10 METERS izz OPEN!!
OK guys, I'm hearing lots of 10meter FM repeater activity up around New York and New Jersey Six is open to the southwest... I am QRV from Lincoln, Nebraska on 29.000Mhz listening..and listening I should be in-and-out of the shack pretty much all day. How 'bout some 10 meter AM 73 de Dan -- WAØJRD ..
Re: [AMRadio] JOHNSON WHITEFACE
Hello Bob: Congrats on NIB Whiteface. There are still a lot of them around but not many NIB. I own 3 of them, one looks like it needs some TLC, one I converted to 10 Meters easily, just new crystals and 20 minutes tune-up. As I recall, I put 29.000 and 29.100 in that one. (I scan 29.000 to 29.150 in 10 KHz steps). I think I doubled the power by shorting out the final screen resistor but would have to look at it again. (I did not get 10 Watts out). One Whiteface I converted to cover 160 Meters. This is a bit more difficult ( new final coil and tune cap, new RF Chokes etc + crystals ) works well for local net type use. They are a fun radio to work on or to get your first conversion going. Have fun. 73, Charlie, K0NG ..
RE: [AMRadio] JOHNSON WHITEFACE
Dan: The Whiteface uses 29 MHz 3rd Overtone crystals, cut to the same specs as the original 27 MHz crystals except the frequency. I have manuals etc. if you need a copy. 73, Later, K0NG
RE: [AMRadio] JOHNSON WHITEFACE
Great Charlie Will be taking pixs of all today and posting them on my Web site. Need to make an AC power cable up for it... It did not come with it...Bob -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Saturday, May 27, 2006 11:48 AM To: Discussion of AM Radio; Bob Peters Cc: Boatanchors; amradio Subject: Re: [AMRadio] JOHNSON WHITEFACE Hello Bob: Congrats on NIB Whiteface. There are still a lot of them around but not many NIB. I own 3 of them, one looks like it needs some TLC, one I converted to 10 Meters easily, just new crystals and 20 minutes tune-up. As I recall, I put 29.000 and 29.100 in that one. (I scan 29.000 to 29.150 in 10 KHz steps). I think I doubled the power by shorting out the final screen resistor but would have to look at it again. (I did not get 10 Watts out). One Whiteface I converted to cover 160 Meters. This is a bit more difficult ( new final coil and tune cap, new RF Chokes etc + crystals ) works well for local net type use. They are a fun radio to work on or to get your first conversion going. Have fun. 73, Charlie, K0NG .. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] White Face Johnson
Bob Peters wrote: All I can say is WOW... Looking forward...to getting it on the air... Hi Bob, Now you can start looking for a Johnson PA/85 amplifier, which was designed to work with the later vintage Messenger AM business radios. It runs a 6883 final with solid state plate modulator and has built-in T/R relay so should work with most any 5 watt exciter, but I've not tried mine yet. 73, Bob W9RAN
Re: [AMRadio] JOHNSON WHITEFACE
I had two Johnsons in decent shape but figuring the cost of receive and transmit crystals (you never always have the right pair), no tunable receive, I opted to sell them, and picked up a beautiful Lafayette HA-410 with tunable receive, VFO or crystal operation, 2E26 in the final, and a spot switch that allows you to zero in (i.e. a tunable BFO) and even work SSB stations. It's even plate modulated. Pete, wa2cwa On Sat, 27 May 2006 11:48:02 -0500 [EMAIL PROTECTED] writes: Hello Bob: Congrats on NIB Whiteface. There are still a lot of them around but not many NIB. I own 3 of them, one looks like it needs some TLC, one I converted to 10 Meters easily, just new crystals and 20 minutes tune-up. As I recall, I put 29.000 and 29.100 in that one. (I scan 29.000 to 29.150 in 10 KHz steps). I think I doubled the power by shorting out the final screen resistor but would have to look at it again. (I did not get 10 Watts out). One Whiteface I converted to cover 160 Meters. This is a bit more difficult ( new final coil and tune cap, new RF Chokes etc + crystals ) works well for local net type use. They are a fun radio to work on or to get your first conversion going. Have fun. 73, Charlie, K0NG ..
Re: [AMRadio] White Face Johnson
That reminds me Bob; somewhere around here I have one Polycomm's business band amplifiers still wrapped in plastic that came out of a walk-in dumpster when they were junking a bunch of stuff from a closed NJ location. Pete, wa2cwa On Sat, 27 May 2006 12:43:33 -0500 Robert Nickels [EMAIL PROTECTED] writes: Bob Peters wrote: All I can say is WOW... Looking forward...to getting it on the air... Hi Bob, Now you can start looking for a Johnson PA/85 amplifier, which was designed to work with the later vintage Messenger AM business radios. It runs a 6883 final with solid state plate modulator and has built-in T/R relay so should work with most any 5 watt exciter, but I've not tried mine yet. 73, Bob W9RAN
Re: [AMRadio] White Face Johnson
On a good sporadic E opening, you can have solid audio and strong signal levels. The key is being there when it happening. Since we're at the bottom of the sunspot cycle, consistent and/or long term great conditions, can only be a dream. Pete, wa2cwa On Sat, 27 May 2006 09:16:26 -0400 kenw2dtc [EMAIL PROTECTED] writes: Paul, Your excellent recording sounded like a 'closed circuit' connection. What antenna were you using and when do you expect conditions to return to that level of contact? 73, Ken W2DTC
[AMRadio] looking for schematic for Lavoie LA-800D WWV Comparator and HP 851B display unit
If you can photocopy either let me know. TNX! de KA4JVY Mark __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[AMRadio] BTA Mods
Well... I have investigated the printed circuit board on the 1R2 on which the crystal ovens are mounted and find there have been several modifications and/or repairs made through out this old girls life. My intention, as advised by much more knowledgeable people on these transmitters, is to put it back to it's original state, be sure it's operating at the original specifications, then begin the conversion to 75 meters. My concern is that some of these mods may have been handed down by RCA and should possibly be left in tact. Does anyone know of any modifications that RCA issued concerning this portion of the transmitter? I have found traces cut and spliced to other traces, a small variable capacitor replacing a compression trimmer and two of the three crystal sockets more or less taken out of use with that fact marked in pencil on the board. My inclination is these are repairs made due to failure of components, but with no documentation on the repairs it's very difficult to be sure. The board is badly scorched beneath the 4000 ohm 10 watt resistor, but I have read this is a common issue. There is no trace damage to the board from the heat. Any advice will be very much appreciated. For those who subscribe to more than one list, I apologize if you receive this post more than once, but I want to reach the largest audience possible for assistance and advice. Thanks, Rick/K5IZ
Re: [AMRadio] White Face Johnson
Peter Markavage wrote: That reminds me Bob; somewhere around here I have one Polycomm's business band amplifiers still wrapped in plastic that came out of a walk-in dumpster when they were junking a bunch of stuff from a closed NJ location. I didn't know Polycom made one, Pete but it sounds liek a neat mate for your HA-410. This Johnson came from a local guy who ran an aerial spraying business, using the old AM business band located just above 10 meters. He gave me several of the solid state mobiles too, just wanted it gone. Turns out he was trying to copy some information in-flight and the skip was in and he ended up spraying the wrong field. Ripped it out and went FM. I don't know how widely this AM business band was used, but you do see amps from various CB makers like Sonar on eBay and at hamfests. What I thought was cool about the Johnson PA/85 is the high level modulator vs. a linear amp. 73, Bob W9RAN
Re: [AMRadio] BTA Mods
Rick, Just a thought on the osc circuit. You could always disconnect the osc board and use a signal generator to feed the grid of the 6146. This will let you test out the remainder of the transmitter on the AM broadcast freq. I would think that the crystal osc will be removed when you move it to 75M, so fixing it may not be worth the effort. 73's Roger KC8OPP --- Rick Brashear [EMAIL PROTECTED] wrote: Well... I have investigated the printed circuit board on the 1R2 on which the crystal ovens are mounted and find there have been several modifications and/or repairs made through out this old girls life. My intention, as advised by much more knowledgeable people on these transmitters, is to put it back to it's original state, be sure it's operating at the original specifications, then begin the conversion to 75 meters. My concern is that some of these mods may have been handed down by RCA and should possibly be left in tact. Does anyone know of any modifications that RCA issued concerning this portion of the transmitter? I have found traces cut and spliced to other traces, a small variable capacitor replacing a compression trimmer and two of the three crystal sockets more or less taken out of use with that fact marked in pencil on the board. My inclination is these are repairs made due to failure of components, but with no documentation on the repairs it's very difficult to be sure. The board is badly scorched beneath the 4000 ohm 10 watt resistor, but I have read this is a common issue. There is no trace damage to the board from the heat. Any advice will be very much appreciated. For those who subscribe to more than one list, I apologize if you receive this post more than once, but I want to reach the largest audience possible for assistance and advice. Thanks, Rick/K5IZ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [AMRadio] White Face Johnson
Pfft! How DARE anyone get excited about band openings? QUICK, throw water on them! LOL On a good sporadic E opening, you can have solid audio and strong signal levels. The key is being there when it happening. Since we're at the bottom of the sunspot cycle, consistent and/or long term great conditions, can only be a dream. Pete, wa2cwa On Sat, 27 May 2006 09:16:26 -0400 kenw2dtc [EMAIL PROTECTED] writes: Paul, Your excellent recording sounded like a 'closed circuit' connection. What antenna were you using and when do you expect conditions to return to that level of contact? 73, Ken W2DTC __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
[AMRadio] 10 Meters
Both the W1OJ repeater near Boston, and the one in New York are pounding into my Mississippi qth on 29.620 at 2050Z. That said, I'm monitoring 29.0, and have called a few cq's with no results. Mike Duke, K5XU American Council of Blind Radio Amateurs
[AMRadio] White Face Johnson
All this talk about the White Face Johnson, has me thinking more about restoring the one I acquired about 5 years ago. The first thing it needs is a good bath! Like Pete, I have an HA410, plus a 40 channel solid state converted Sharp rig, but it would be neat to convert the Messenger back to its original design frequency. I still, however, think it would be fun to put one on 15 meters since that band will wake up before 10. As someone indicated, that would take a bit more work, but probably not as much as putting one on 160. Mike Duke, K5XU American Council of Blind Radio Amateurs
Re: [AMRadio] White Face Johnson
I am sort of surprised at the discussion of this radio. The whiteface was much better built than some of their amateur gear. In it's inception, the Citizen's Band as it was dubbed, required type certified radios. In actually it was Class D business band and created for an inexpensive way for businesses to have communications over a limited area. Because of skip and the fuel shortage of the 70's it met its present fate. During the fuel shortage, when the speed limit was set nationally at 55 MPH, truckers adopted it for communications to avoid Smokey. 10 meters is a great band much of the time even though we do not know it, unless someone makes noise and another hears. Back about 6 years ago, 10 was wonderful and I regularly worked a guy out in NC from Las Cruces, NM who used a Johnson CB. He only converted it to 10 meters and used it as is. I have never been a fan of crystal control because stations would choose an open frequency and call CQ. If you are crystal control, as the NC station was, I would find him calling me 10 or 20 kc away and that was after I monitored my transmit frequency for a time looking for answers. When I found him, I would tune to his frequency and we could have a QSO lasting an hour or more. At that time the band could be one station after another from 29 to 29.150. I suppose there is a type of magic using a converted CB, but I would probably find a Ranger, AF-67 or such to use. It does have a bit more power but that is a bit of a plus with the propagation of today. One can also move to 15 meters with them which the CB would not do without extensive modifications. 73 Jim W5JO Pfft! How DARE anyone get excited about band openings? QUICK, throw water on them! LOL On a good sporadic E opening, you can have solid audio and strong signal levels. The key is being there when it happening. Since we're at the bottom of the sunspot cycle, consistent and/or long term great conditions, can only be a dream. Pete, wa2cwa : Paul, Your excellent recording sounded like a 'closed circuit' connection. What antenna were you using and when do you expect conditions to return to that level of contact? 73, Ken W2DTC
Re: [AMRadio] BC-610 Modulation Transformer
You've got it, John. That accurately describes the terminals on my BC-610D transformer, anyway. -Larry/NE1S John E. Coleman (ARS WA5BXO) wrote: I think the XFMR has four connectors on one end and two on the other end. The bottom two of the four are to be strapped and make the B+ connection for the modulator. The top two, of the four, are the modulator plate connectors. The two on the other end are the secondary winding to go to the final plate circuit. This is from memory and pictures, so don't take it for 100% accuracy. John, WA5BXO
[AMRadio] White Face Johnson
Richard, Mike, Pete etc. Thinks... I'll tell 'em where to put their Johnsons! - LOL Mike wrote... I still, however, think it would be fun to put one on 15 meters since that band will wake up before 10. As someone indicated, that would take a bit more work, but probably not as much as putting one on 160. Speaking of multi-band AM rigs... one of the popular schemes in the early 1960s in the UK was to homebrew an AM transmitter for both 160m and 2m AM!! Or sometimes they were for 160m AM and 4m AM (70 MHz band) - not that we have 4m in the USA, but it is kind of equivalent to 6m, I suppose. Those rigs would leverly use a single local oscillator with the appropriate mutipliers and mixers and voila - two band rig for 160m and VHF in one box! 160m AM was THE local band/mode for there in the 1960s, before 2m AM caught on, and LONG before 2m FM kicked in. THOSE were the days! 10 watts were all anyone needed for either band! For those who love the old rigs and remember the old days fondly, WE will hang on to and cherish our older rigs but, For those who hate nostalgia, and have only miserable memories of the past - sure - go ahead and put your old WhIteface Johnsons in the trash!
[AMRadio] White Face Johnson
Jim Wilhite says: I suppose there is a type of magic using a converted CB, but I would probably find a Ranger, AF-67 or such to use. It does have a bit more power but that is a bit of a plus with the propagation of today. One can also move to 15 meters with them which the CB would not do without extensive modifications. One man's magic rig is another man's dumpster destiny, and another guy's dumpster-diving treasure! Beauty is often in the eye of the beholder. Those who have never run a converted Johnson whiteface or chromefaced rig on 10m AM will never know how much fun they are missing! It is kind of like those who vehemently claim that Ice cream is no good! - while having never tasted any themselves - LOL!
Re: [AMRadio] JOHNSON WHITEFACE
N4XY responds to Pete's comments about the recommendation of trashing an old, NIB Johnson Whiteface transciver: QUOTE: Since I can't let Pete's comment(s) sit, I'll make one last public remark, then drop it on the list as far as my own comments are concerned. The trick is going to be to do this without flame. So here goes: Where else does one put an NOS/NIB radio with all the papers/etc? It would be fine to get it out and operate on occasion, but since it is CB, I just wouldn't do that. Yet... I would have considered buying it (these days I probably couldn't have afforded this particular jewel: it's an allocation of resources thing) if I was suitably flush. Why? Because, as I said, I consider it to have serious significance within a Historical perspective of the HF Spectrum. THIS radio was THE radio CBs were compared against for years. I only know about it at all because of the number of 'Citizens' I heard/overheard talking about White-Face-Johnsons. I believe its place in the chronicles of HF Radio in general is a significant one; and it just seems like a shame to find a NEW one and chop it up. Now that I think about it, if I WAS flush, I'd try to buy this myself in a heartbeat. I think it is that significant. Now for the difficult-almost-flame part: Why in the world are you even ON a reflector like this one Pete, if radios-to you-are just bundles of components? And if it's just CBs ONLY that you feel that way about, why is yours an opinion even worth remarking? As folks like to say these days: whatever. Please feel free to disparage all you like off-list-and I guess even one good shot ought to be allowed ON list since I took this one. I actually do not mean it as an insult, but am mostly just curious. You seem to have no respect for equipment at all. One small aside: I do not mean to be wearing false colors: I am the Reflector Manager for the QSL.NET EFJohnson email Reflector. I cannot recall EVER seeing anything about CB on there. If there ever has been, it has been so infrequent I just don't remember it (and wouldn't have paid much attention to it anyway.) I just didn't want somebody thinking about it later and seeing some agenda in this. At 03:43 PM 2006-05-27, Peter A Markavage wrote: How many of these things need to float around to preserve history? And preserve it for whom? It's a plain-jane CB; a box of hardware and components connected together. It was one of dozens of models popping up during that time frame. It wasn't even the first CB on the market. Chop it up, modify it, turn it into a blender, or whatever. It has little historic significance for future generations. Personally, I would sell it, and buy a real radio. Pete, wa2cwa ///snip 72/73 Ed Tanton N4XY [EMAIL PROTECTED] = = = Those who forget history are doomed to repeat it - so I guess we all know what to buy Pete for Christmas this year!
Re: [AMRadio] 10 Meters
Called CQ quite a few times between 2230 and 2300 today (Saturday). No results, but in between I worked quite a few CW stations on 10M in the CQ WW PX contets, so 10 is open from here (Central PA) to parts of the midwest. I'll try again around 2330 or so today on 29.0; hopefully 10 will still be a bit open. 73 Mark K3MSB On 5/27/06, Mike Duke, K5XU [EMAIL PROTECTED] wrote: Both the W1OJ repeater near Boston, and the one in New York are pounding into my Mississippi qth on 29.620 at 2050Z. That said, I'm monitoring 29.0, and have called a few cq's with no results. Mike Duke, K5XU American Council of Blind Radio Amateurs __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
Re: [AMRadio] 10 Meters
In a message dated 5/27/06 4:05:00 PM, [EMAIL PROTECTED] writes: Called CQ quite a few times between 2230 and 2300 today (Saturday). etc., etc. Not hearing anything on 10M out this way. Dennis D. W7QHO Glendale, CA
Re: [AMRadio] BC-610 Modulation Transformer
In a message dated 5/27/06 2:36:10 PM, [EMAIL PROTECTED] writes: You've got it, John. That accurately describes the terminals on my BC-610D transformer, anyway. Larry, My copy of TM 11-280 (SCR-299) indicates the terminals as being marked B and P respectively for the B+ and Plate ends othe windings. Any markings on your unit? Dennis D. W7QHO Glendale, CA
Re: [AMRadio] 10 Meters
Called CQ almost continuously between 2330 and 2340 today (Saturday) and heard nobody. I went back to 10 CW and 5's were strong, I heard a weak KH6 (think it was KH6RZ ), and several K6's were heard (also weak). I'll try again tomorrow. 73 Mark K3MSB On 5/27/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: In a message dated 5/27/06 4:05:00 PM, [EMAIL PROTECTED] writes: Called CQ quite a few times between 2230 and 2300 today (Saturday). etc., etc. Not hearing anything on 10M out this way. Dennis D. W7QHO Glendale, CA In a message dated 5/27/06 4:05:00 PM, [EMAIL PROTECTED] writes: Called CQ quite a few times between 2230 and 2300 today (Saturday). etc., etc. Not hearing anything on 10M out this way. Dennis D. W7QHO Glendale, CA
[AMRadio] PB
Anyone have an old Potter Brumfield catalog dating some where in the 50's? I need info on a PB SL4349 relay. It's s tiny DPDT with plug in printed circuit board type mounting, 115 vdc coil (I think.) Rick/K5IZ
Re: [AMRadio] RCA blower
From: Rick Brashear [EMAIL PROTECTED] Thanks for the tips, Paul. There is no doubt the service will be considerably lighter than its original application and likely I could get by with less air flow. I'd just like to get it back close to original if possible. I will be looking for a quieter blower, no doubt. However, I've been searching for that elusive quiet blower for some time for my 3K Premier and have yet to find it. I cut down the blower noise on my Gates BC1-T to useable level by rewiring the fans to run at half voltage. Originally they were on a 220v circuit, so I rerouted the leads to run them on 110v. Despite reduced air flow, they still keep the interior of the transmitter cabinet cool, but instead of sounding like a vacuum cleaner running, I can just barely hear them. The transmitter is located about 15 ft from the operating position. Before the modification, I had to disconnect the fans altogether because the transmitter was too noisy to use in the same room. I checked, and the fan motors do not run hot at reduced voltage, which can be a problem with some electric motors. There was an unused toggle switch on my transmitter, so I wired it to operate the fans. With a flip of the switch, I can turn the fans on (at 1/2 voltage) or turn them off altogether. I usually do not run them in winter, when I keep my shack at about 60 degrees F to save on heating fuel. Don k4kyv ___ This message was typed using the DVORAK keyboard layout. Try it - you'll like it. http://www.mwbrooks.com/dvorak/ http://gigliwood.com/abcd/
Re: [AMRadio] RCA blower
Don, Thanks for the advice. If I can find a 220 volt motor I fully intend to install a switch some where that will reduce the power to 110 volts. However, I'm having a hard time locating one so far. Even though I fully intend to remote the transmitter I would like to have the option of having it in the shack. Rick/K5IZ Donald Chester wrote: I cut down the blower noise on my Gates BC1-T to useable level by rewiring the fans to run at half voltage. Originally they were on a 220v circuit, so I rerouted the leads to run them on 110v. Despite reduced air flow, they still keep the interior of the transmitter cabinet cool, but instead of sounding like a vacuum cleaner running, I can just barely hear them. The transmitter is located about 15 ft from the operating position. Before the modification, I had to disconnect the fans altogether because the transmitter was too noisy to use in the same room. I checked, and the fan motors do not run hot at reduced voltage, which can be a problem with some electric motors. There was an unused toggle switch on my transmitter, so I wired it to operate the fans. With a flip of the switch, I can turn the fans on (at 1/2 voltage) or turn them off altogether. I usually do not run them in winter, when I keep my shack at about 60 degrees F to save on heating fuel. Don k4kyv
