Hello Willy, What I learned from this forum, was a second gettering process, after being familiar with the first, and which I have used on 3-500Z family of tubes. That is the process of running the p
Nebraska Radio has a catalog with a lot of photos and Specs: http://www.surplussales.com/VaccumVarCaps/VVC5.html Best Regards, Pat Barthelow AA6EG _______________________________________________ Amps
Friends, I have always been in admiration and awe to watch a Glass tube QRO Amp in full song. In the case of 4-400As or 3-500Z tantalum plates, wile being a teenager-ham, I tended to wince a little a
Friends, I am looking for hands on info, or data books on the Rohde and Schwarz TV and other use, Solid State Amps. Series 7000 and Series 8000. There may be some available surplus at decent prices P
Here is an idea to help instant on Tubes, reduce the cold to hot current shock cycles. I was going to say install a Variac in the filament circuit. Variacs to handle 200 watts are not so expensive an
I have been thinking about what Roger and Carl just mentioned about front panel modes that would be nice for amp flexibility. Why not find the best key fob short range on off switch widget out there,
I googled Aircraft Gyro Shipping, and got a lot of relevant information, including Service Ships for Aircraft Gyros, perhaps one of the most fragile instruments commonly shipped, in the airline Avion
Friends, I was asked to look at and do appropriate repairs /upgrades for a Heathkit SB 221. Photo album of As-found 221, and a W8JI photo, also, are at: http://www.facebook.com/media/set/?set=a.23226
Swap Shop newsletter for Power Hungry QRO RF engineers... Swap Shop postings for a place where KW amplifiers are low level drivers. CERN looks like a cool place to work in RF QRO! http://www.cap.bnl.
Friends, Somewhere I saw a 3 -500Z input network aftermarket kit that was a long narrow board with the coil/cap combos mounted side by sideon the board, and available for 3-500Z or perhaps SB 221 ins
Hey, I wonder if a friendly visit or call to the Local Chapter of SBE (Society of Broadcast Engineers), could result in a look in their storage sheds, for an old Tube Broadcast TX power supply, that
Friends, After being offered for free, a Working Pull complete Tetrode cavity TV amplifier on 470mhz, (Sans power supplies which would have to be built) and with possible plans to make a moonbounce A
Friends, I discovered an endless source of HV Air Capacitors, from another application. Might be good for KW amps, or QRO antenna Tuner Components. The local Goodwill Store, has large numbers of Air
Are there any on-line references with engineeriing information to design retrofitted water cooling hardware to existing large Heat sinks? Are there such things to buy, as aluminum tube extrusions, s
Friends, Have an Alpha 76A for sale, with 3 tube PA, and legitimate questions of concern are voiced, for the very expensive finals, no longer made, by prospective buyers. If one of the three finals f
Thanks Roger, I should have been more correct by saying the were no longer made, (by Eimac) Best Regards, Pat Barthelow _______________________________________________ Amps mailing list Amps@contesti
Don, "Sparkys" are what Avionics Maintenance Techs are called almost universally in the Air Carrier Airline Maintenance business.. Best Regards, Pat Barthelow AA6EG __________________________________
Here is a tube with a different style handle. 7.5KW TV cavity PA at about 470 Mhz. Click right arrow for picture show, twice, to see side view photo. https://skydrive.live.com/?cid=2eb5c45df634a712#c
Tube era, IPA, at 7KW, with a $8K tube cost. Dont know the total commercial cost for the cavity system shown. What would a 7KW output TV SSPA on 470 mhz cost, ballpark? ______________________________
A single site mother lode of Tube information, many links: http://www.tubebooks.org/tube_data.htm What it does not explain is how/why there are companies that are able to sell 200 watt TUBE audio amp