RE: [AMRadio] New Guy to AM
Thanks Jim. How come I couldn't find that PDF on the AM Window site? I must not have the secret decoder ring yet! LOL I would love to try a QSO on AM. 7PM is a bit to early for my to play Radio on a Friday night! I am a full time collage student at night, work full time during the day, and I'm married.. So there is that Honey doo list! ;) Maybe later? Bow W5EFR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Candela Sent: Thursday, March 22, 2007 20:19 To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] New Guy to AM Bow, At the following link is a schematic of an AM rig that uses similar tubes. You could replace the 6AG7 with a 6V6 or 6K6, and replace the two 6LF6's with four 6DQ6's. This rig is good for 25 watts AM, and doesn't need a modulation transformer. The downside is the Class A series modulator, and the need for a +1100v B+. It sure is simple though, and should be easy to home brew. http://www.amwindow.org/tech/pdf/eckfinal2.pdf As for 30-40 watts AM between Houston, and Round Rock, you should be 5-9 here in the early evening until the band lengthens out. My main rig right now is a Gonset G76 that runs 55 watts AM, and I get out really well with it using an 80 FW loop up about 18'. This is a 'cloud burner' antenna that does really well out to about a 300 mile radius. This is perfect to talk to Houston. The trick with the Icom 718 will be to achieve full modulation rather than maximum carrier, and squishy modulation from overload or ALC popping. You are better at 25 watts carrier instead of 40. Maybe we can make a schedule for tomorrow evening at 7'ish? Jim JKO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bow Sent: Friday, March 23, 2007 2:30 AM To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] New Guy to AM Hey Jim! I live on the northwest side of Houston, TX and I am on 75M, but only tried SSB so far, I don't think my screaming Icom IC-718 will do much with it's 30-40 watts of AM. My current tube stash consists of: 2- 815 2- 807W 3- 12SK7 1- 12A6 1- KT88 2- 6DQ6 3- 6L6 3- 6K6 1- EL34 1- 6V6 and several dual triode Preamp tubes... Is there any hope? LOL Bow W5EFR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Candela Sent: Thursday, March 22, 2007 19:23 To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] New Guy to AM Bow, Welcome to the group! I hope this group provides you with knowledge and camaraderie from a bunch of fine folks who have a passion for AM. So where do you live? Do you work 75 meters? I don't have any experience with the 815, but I have heard that this is one of those tubes that suffers from imperfect vacuum seals, and many NOS 815's are bad now even though unused. Maybe some others can chime in on that comment. You can make a mighty fine AM rig out of three 807's, (1 RF final, and two P-P modulators) and when conservatory run will provide 15-30 watts of high quality AM. For more power something like a Heathkit SB-220 can transform this kind of rig to full legal AM power when the peaks extend up to ~ 1500 watts PEP with a resting carrier level at around 350 watts. Since you identify with the guitar amp circuit, this rig combo is like a Fender Champ acoustically coupled to a big solid state PA amplifier. Regards, Jim WD5JKO __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.16/729 - Release Date: 3/21/2007 07:52 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.16/729 - Release Date: 3/21/2007 07:52 __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.17/730 - Release Date: 3/22/2007 7:44 AM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website:
[AMRadio] 4-400 first made when?
In doing some research - I notice that the 4-400 seems to be a fairly late arrival, at least as far as RCA is concerned. It's in none of my HB-3s, not in my 1962 TT5, but is in the 1975 TT5 manual. Since my transmitting tube library has this 12-year gap, I'm assuming RCA began to produce the device sometime after 1964... does anyone have better info on the history and development of this very 'popular' power tube? Thanks in advance for any enlightenment! Okay - over and out... Cheers John KB6SCO DM09fg __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] eBay prices / trends
You guys who love to grunt about eBay driving the prices of Boatanchor Gear might want to re-read Tim Shoppa's last two posts... I think we're getting into our own version of the Global Warming Debate... HIHI! There exist a number of eBay-specific research tools and applications. Most of them require subscriptions or fees. Can't say I blame 'em there. I subscribe to a service called Hammertap - www.hammertap.com . It provides long-term, in-depth archiving and analysis of eBay data - and when you consider the sheer volume of that data on a daily basis - the $20 a month it costs is a pretty good deal for me, at any rate. (Of course if you are an occasional user of eBay this is pretty steep - but if you sell frequently, or sell high-dollar items - these types of services may very well be worth thier cost). The ability to statistically research prices and price history on Damn Near Everything makes setting my own prices and minimum bids a matter of science instead of guessing... currently it's doing much better than just 'paying for itself' - so I'm happy with this particular solution. There are several others out there - Google for Ebay research and you'll find 'em. Cheers John KB6SCO DM09fg __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Mfg date for 4-400 series
On Fri, 23 Mar 2007, Bob wrote: According to the info that I have, they were in production in 1950. They were not listed in the 1948 data sheets. So it could be between 1948 and 1950. Hope this helps. Actually, this deepens the Mystery - both my HB3s reach from the late 30s to the early 60s... they were updated by subscription, so it depended on who had them as to exactly which updates got posted. I have a 1962 TT5 that goes directly from 4-250A to 4-1000, as do the HB-3 sets. I am lacking RCA transmitting tube data from 1963 - 1971. The 4-400 does appear in the 1972 TT5 manual. So: if they were made starting in 1950 - why are they not in the data books until nearly 15 years later..? I'm sure there's a fine answer out there, somewhere just one of those trivial pusuits to distract one from the day's Business.. ;} Cheers John KB6SCO DM09fg __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Mfg date for 4-400 series
Data Point: The first mention, in QST, in April 1957 -- A 4-400A amp.. 73, Larry KQ4BY __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 4-400
The info I posted has been confirmed by phone call to Eimac 73, Bob __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] 4-400 first made when?
I've not researched the 4-400, but I can say for sure we replaced the 4-125's with 4-400's when we upgraded our broadcast transmitter from .25kw to 1kw around 1961. The transmitter was a Collins, 20J and the upgrade made it a 20V-2. 73 de W4MIL Chuck -Original Message- From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Fri, 23 Mar 2007 11:16 AM Subject: [AMRadio] 4-400 first made when? In doing some research - I notice that the 4-400 seems to be a fairly late arrival, at least as far as RCA is concerned. It's in none of my HB-3s, not in my 1962 TT5, but is in the 1975 TT5 manual. Since my transmitting tube library has this 12-year gap, I'm assuming RCA began to produce the device sometime after 1964... does anyone have better info on the history and development of this very 'popular' power tube? Thanks in advance for any enlightenment! Okay - over and out... Cheers John KB6SCO DM09fg __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] 4-400 first made when?
- Original Message - From: John Lawson [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Friday, March 23, 2007 7:16 AM Subject: [AMRadio] 4-400 first made when? In doing some research - I notice that the 4-400 seems to be a fairly late arrival, at least as far as RCA is concerned. It's in none of my HB-3s, not in my 1962 TT5, but is in the 1975 TT5 manual. Since my transmitting tube library has this 12-year gap, I'm assuming RCA began to produce the device sometime after 1964... does anyone have better info on the history and development of this very 'popular' power tube? Thanks in advance for any enlightenment! Okay - over and out... Cheers John KB6SCO DM09fg Hi John, Eimac, known then as Eitel-McCullough, as well as a number of other tube manufactures faced a dilemma at the end of WWII. Millions of tubes had been manufactured and were glutting the market. Tube manufactures, who had a good run during the war, faced a consumer market when the war ended. With all the surplus tubes available they had to develop a new market to survive. That is why (and when) the air-cooled tube family of power tubes was introduced. 4-65, 4-250, 4-400, 4-1000 were only some of the models of the new designs. Unfortunately, some companies, such as Heinz and Kaufman were trapped by accepting late contracts from the military. The contracts kept the business alive for a short time after the war ended, but when the contracts ran out, HK found themselves out of the consumer market. They never could catch up. Bill __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Globe Champ 350
It's c82, 70 uuf SM. Grant/NQ5T -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Wilhite Sent: Friday, March 23, 2007 2:47 PM To: AM Radio Discussion List; WRL Mailing list Subject: [AMRadio] Globe Champ 350 Hi All: If anyone has a manual on the Globe Champ 350, would you take a look at the diagram and identify a capacitor for me? It is in parallel with RFC2 and C 21 on the cathode of V2 the Xtal osc/Buffer. I have the download version of the manual from BAMA, but that component marking is not clear enough to identify. 73 Jim W5JO __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Re: AMRadio Digest, Vol 38, Issue 24
Hello all, I'm a new guy to the AM Radio list, my Name is Scott, my friends call me Bow (like bow and arrow). I am located on the northwest side Houston, TX and I like to homebrew. I have built quite a few tube guitar amps and such from scratch, and now I am interested in cooking up an AM transmitter to get on the air... Tubes, of course. :) I recently acquired some 815s and 807W tubes (2 each) that I would like to put to use. Until I get my homebrew project started, I will be putting my Knight T60 on the air, just to try it out. I am currently waiting for the DDS VFO kit that I ordered to come in, as that will be the VFO I use for the T60, as will as other transmitter projects. I have a EF Johnson Messenger Two 11 meter rig that I will be putting on the 10 Meter AM band as well, when 10 meters opens up again. I also have a Icom IC-718 that is on the air now. I hope to catch you on the bands. Bow W5EFR Bow, I think I used to live not too far from your QTH back in the late 70's. I lived in the Heights area of Houston, near the intersection of W 24th Street and Rutland (Ave?}. The 815 is a pair of 807's in one envelope. If yours is good, you could run about 100 watts plate modulated with it, or use it as a modulator tube and get enough audio power to modulate a 100 watt carrier. I had never heard that about the 815, but many of those tubes with multiple seals in the envelope are notorious for taking in air as they remain on the shelf for many years. What kind of DDS VFO kit did you order? Several years ago I picked up a DDS vfo at Dayton. It was made by SS Engineering (if I recall the name correctly). It tunes up to 16 mHz, but I used it @ 7 mHz and multiplied up with an old Eico 720 to work 10m, and it seemed to have near perfect stability. I used it with the recent ARRL frequency measuring test, and managed to measure one of the frequencies (80m) within 0.5 Hz. So if yours has clean output, free of spurs, it would make an excellent vfo for AM or any other mode, for that matter. You ought to try to get in touch with John, WA5BXO and Otis, K5SWK. They now live somewhere north of Houston, near Conroe I believe. They have been tall ships on AM from the Houston area for decades, and could probably help you. BTW, does anyone in the Houston area know what ever happened to the museum and collection of pre-WW2 radio publications that used to be in the building that housed the Houston amateur radio club in the late 70's? They had a their own building and meetings were held on Friday nights, once a month as I recall. Part of the meeting was an auction that alternated between good equipment and junk parts. Some of the museum stuff was extremely interesting, and would be highly sought after to-day, and the publications, mostly broadcast related technical magazines from the late 20's throughout the 30's contained a lot of hard to find technical data and history of radio. They had some framed photographs of club meetings before WW2, and I recall one picture listed the members, and one of the members present in the photograph was Howard Hughes in his younger years. I understand that the part of Houston where that building was located flooded out during a hurricane a few years after I left. I would hope that all that history didn't get destroyed in the flood. Someone told me that the Houston amateur radio club disbanded in the 80's. Don k4kyv __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] 4-400 first made when?
Brad and the group, My posting said 20Jno such animal to my knowledge. My age is allowing the thoughts of the 20V2 and the 300J to run together. I should have said, the transmitter was a Collins 300J and the upgrade made it a 20V-2. Now I feel better. I'm reasonably sure we changed some iron but thats been a long time ago. We did add a Rube Goldberg designed homebrew solenoid arrangement that allowed use of the power cutback switch. The station ran 1kw day, and .25kw night. The transmitter was remotely controlled and if I remember correctly, the R/C unit was made by RUST, Corp.. I'd suggest getting a schematic of the 20V-2 and comparing it with the 300J to make your restoration a bit easier. Funny, I can still remember the Ep , Ip and I (ant) plus the antenna resistance. 1500v, .225a, .73a and 470 ohms. (.25kw readings) For the 1kw power setting they were 3100v, .455ma, 1.49a and 470 ohms. I must have read those meters hundreds of times. We were always wary of an FCC visit. And we had one or two while I was CE. Those were the days. Brad, if you were close by I'd volunteer to assist in bringing the old transmitter back to life. They were excellent pieces of gear. Gud luck es 73 Chuck W4MIL -Original Message- From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Fri, 23 Mar 2007 1:44 PM Subject: RE: [AMRadio] 4-400 first made when? I've not researched the 4-400, but I can say for sure we replaced the 4-125's with 4-400's when we upgraded our broadcast transmitter from .25kw to 1kw around 1961. The transmitter was a Collins, 20J and the upgrade made it a 20V-2. 73 de W4MIL Chuck Chuck, and the rest of the group, I have a Collins 300 J basket case (no iron) I am changing it to a 20V2, any advice on the 4- 400 swap, does anyone have any of the transformers, (does not have to be out of a Collins 20v2, just needs to be for 4-400's) Thanks Brad KB7FQR -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.17/730 - Release Date: 3/22/2007 7:44 AM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] 4-400 first made when?
- Original Message - From: [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Friday, March 23, 2007 1:09 PM Subject: Re: [AMRadio] 4-400 first made when? Brad and the group, My posting said 20Jno such animal to my knowledge. My age is allowing the thoughts of the 20V2 and the 300J to run together. I should have said, the transmitter was a Collins 300J and the upgrade made it a 20V-2. Now I feel better. I'm reasonably sure we changed some iron but thats been a long time ago. We did add a Rube Goldberg designed homebrew solenoid arrangement that allowed use of the power cutback switch. The station ran 1kw day, and .25kw night. The transmitter was remotely controlled and if I remember correctly, the R/C unit was made by RUST, Corp.. I'd suggest getting a schematic of the 20V-2 and comparing it with the 300J to make your restoration a bit easier. Funny, I can still remember the Ep , Ip and I (ant) plus the antenna resistance. 1500v, .225a, .73a and 470 ohms. (.25kw readings) For the 1kw power setting they were 3100v, .455ma, 1.49a and 470 ohms. I must have read those meters hundreds of times. We were always wary of an FCC visit. And we had one or two while I was CE. Those were the days. Brad, if you were close by I'd volunteer to assist in bringing the old transmitter back to life. They were excellent pieces of gear. Gud luck es 73 Chuck W4MIL It is funny.. I have a terrible memory for names, can't remember a name 3 seconds after I have heard it. But the 550A-1 meter readings (3870 KHz) are, from memory: Ep, Ip, I(ant) and antenna resistance: 2000v, .225a, 2.6a and 50 ohms (375 watt reading). For the 1kw power setting they are 3000v, .500a (nominal), 4.9a and 50 ohms (1kw). Naturally, the transmitter is run at the 375 watt level. They are excellent transmitters. Interestingly, the transmitter runs with filaments on most of the time it is on at all, but the 4-400's have actually improved with use. They were 80%'ers but now put out better than full power. Guess they like Amateur AM service. If I keep running them, think they'll reach 130%? ;-) 73 de Bill, ab6mt [EMAIL PROTECTED] __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 4-400 first made when?
To All, Looking at an old 1958 ARRL handbook, the 4-400A is listed in the tube data pages. Can't go back further. This is the oldest in the library, besides I was but a mere lad at that date. 73's wd8kdg Craig __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] 4-400 first made when?
Good idea, Craig. However, what I'd like to know is when did RCA start making them? 73, Rick/K5IZ To All, Looking at an old 1958 ARRL handbook, the 4-400A is listed in the tube data pages. Can't go back further. This is the oldest in the library, besides I was but a mere lad at that date. 73's wd8kdg Craig __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 4-400 Facts
The following Eimac Tetrodes are listed in the Product Section in the 1947 Radio and Engineers Handbook: 4-65A, 4X100A, 4-125A, 4X150A, 4-250A, 4X500A and 4-1000A. I talked with their Engineering Department today and they confirmed that the 4-400 series began production in the very late 40's and was first listed in the 1950 Eimac Tube Product Guide. Since it is in my 1950 Eimac Catalog and not listed earlier, I think we can assume that Eimac is correct as to the dates of first production. 73, Bob,W4WSZ Eimac user for 55 yrs. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Re: AMRadio Digest, Vol 38, Issue 24
Hello Don. I live off 290 and 1960/HWY 6 area. I orders a NorCal QRP FCC2 DDS kit with the FCC1 Display. I am hoping to set it up to run different rigs, as needed. It sounds like you have a great setup up there in TN! You really have a full size, 1/4-wave Vertical for 160 Meters?!?!?!?! Bow W5EFR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of D. Chester Sent: Friday, March 23, 2007 14:17 To: amradio@mailman.qth.net Subject: [AMRadio] Re: AMRadio Digest, Vol 38, Issue 24 Bow, I think I used to live not too far from your QTH back in the late 70's. I lived in the Heights area of Houston, near the intersection of W 24th Street and Rutland (Ave?}. The 815 is a pair of 807's in one envelope. If yours is good, you could run about 100 watts plate modulated with it, or use it as a modulator tube and get enough audio power to modulate a 100 watt carrier. I had never heard that about the 815, but many of those tubes with multiple seals in the envelope are notorious for taking in air as they remain on the shelf for many years. What kind of DDS VFO kit did you order? Several years ago I picked up a DDS vfo at Dayton. It was made by SS Engineering (if I recall the name correctly). It tunes up to 16 mHz, but I used it @ 7 mHz and multiplied up with an old Eico 720 to work 10m, and it seemed to have near perfect stability. I used it with the recent ARRL frequency measuring test, and managed to measure one of the frequencies (80m) within 0.5 Hz. So if yours has clean output, free of spurs, it would make an excellent vfo for AM or any other mode, for that matter. You ought to try to get in touch with John, WA5BXO and Otis, K5SWK. They now live somewhere north of Houston, near Conroe I believe. They have been tall ships on AM from the Houston area for decades, and could probably help you. BTW, does anyone in the Houston area know what ever happened to the museum and collection of pre-WW2 radio publications that used to be in the building that housed the Houston amateur radio club in the late 70's? They had a their own building and meetings were held on Friday nights, once a month as I recall. Part of the meeting was an auction that alternated between good equipment and junk parts. Some of the museum stuff was extremely interesting, and would be highly sought after to-day, and the publications, mostly broadcast related technical magazines from the late 20's throughout the 30's contained a lot of hard to find technical data and history of radio. They had some framed photographs of club meetings before WW2, and I recall one picture listed the members, and one of the members present in the photograph was Howard Hughes in his younger years. I understand that the part of Houston where that building was located flooded out during a hurricane a few years after I left. I would hope that all that history didn't get destroyed in the flood. Someone told me that the Houston amateur radio club disbanded in the 80's. Don k4kyv __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.17/730 - Release Date: 3/22/2007 07:44 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.446 / Virus Database: 268.18.17/730 - Release Date: 3/22/2007 07:44 __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
