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361. [AMPS] Grounded-Grid Efficiency (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 09:23:12 -0600; I know it's been covered before, but I am too lazy to look it up. What are "good" efficieny percentages for a typical GG amplifier? If memory serves, then a class AB amp is somewhere around 40% effic; /archives//html/Amps/1999-03/msg00226.html (7,060 bytes)
362. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 15:03:28 -0600; 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Admi; /archives//html/Amps/1999-03/msg00237.html (9,097 bytes)
363. [AMPS] Re: Tuned Input for Clipperton (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 15:18:33 -0600; Before you guys start to criticize me, I MEANT to say FILAMENT choke. 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http:; /archives//html/Amps/1999-03/msg00238.html (8,413 bytes)
364. [AMPS] PCBs (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 11 Mar 99 17:02:32 -0600; Agreed. In fact, Brush-Wellman who makes the BeO substrates has not had any deaths related to BeO exposure. Well, as for the greasy burger stuff, there is plenty of literature out there to support t; /archives//html/Amps/1999-03/msg00241.html (7,938 bytes)
365. [AMPS] IT WORKS!!! (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Fri, 12 Mar 1999 23:48:57 -0600; Hey guys, FINALLY, I got the 4-1000A PA up and working! Yes, I've been on the air with it all night tonight and it performs GREAT. I am getting an EASY 1.5KW from about 80 W of drive on 20M and on 10; /archives//html/Amps/1999-03/msg00267.html (12,175 bytes)
366. [AMPS] Plate Solenoid Chokes (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Sun, 14 Mar 1999 13:28:47 -0600; Carl, if you put a plate bias choke that is SERIES resonant at 50 MHz in an amp designed to work at 50 MHz, you will have problems! A seires resonant choke will look like a very small impedance to t; /archives//html/Amps/1999-03/msg00285.html (7,503 bytes)
367. [AMPS] IT WORKS!!! (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 15 Mar 99 08:56:51 -0600; Correct. I've not a real good way to measure plate voltage. I have a 30KV probe, but that only gets me in the ballpark of a KV or so. After I got the amp up and running, I realized that the meter in; /archives//html/Amps/1999-03/msg00309.html (9,518 bytes)
368. [AMPS] Output power 8877 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 15 Mar 99 09:04:22 -0600; output power you wanted to use a single tone. I don't think power meters read multiple tones accurately (at least the HP ones at Motorola didn't!). 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.q; /archives//html/Amps/1999-03/msg00310.html (8,208 bytes)
369. [AMPS] Output power 8877 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 15 Mar 99 10:43:36 -0600; Correct! So, I am not much of an expert on an 8877, but wouldn't a single tone power of 1800 Watts at 65 W drive be about correct? So perhaps this guys 1200 W number is OK and he doesn't have any pr; /archives//html/Amps/1999-03/msg00313.html (7,994 bytes)
370. [AMPS] KE9NA's successful PA (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 15 Mar 99 16:48:53 -0600; When measuring the anode with the dip meter here is what I saw (approximately, it's been about a week since I measured it): Resonance at 28 MHz - tank circuit was tuned to 10M Resonance in the high; /archives//html/Amps/1999-03/msg00323.html (9,460 bytes)
371. [AMPS] Tubes for QRO (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 1999 06:26:07 -0600; I've been told the PL-175 is an equivalent to a 4-400A. I've got a pair from an old Viking-Johnson Invader. Probably going to use them in my next amp project which will be a 6m amp. 73, Jon KE9NA --; /archives//html/Amps/1999-03/msg00342.html (7,595 bytes)
372. [AMPS] Amp pics available! (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 1999 07:05:51 -0600; Hey all, My first pictures of my 4-1K amp are now available. More are coming. They are available via FTP from: ftp.qsl.net/pub/ke9na/Amplifiers/4-1K Amp I realize the last directory name "4-1K Amp" m; /archives//html/Amps/1999-03/msg00344.html (7,096 bytes)
373. [AMPS] Tubes for QRO (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 99 09:55:36 -0600; Don't think so. I think you guys are thinking of the PL-172. The 175 is a small, 4-400 type tube. I have 2 of them and checked the number myself. The original poster admitted to me he got the number; /archives//html/Amps/1999-03/msg00346.html (7,392 bytes)
374. [AMPS] Corrected Amp Pics (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Tue, 16 Mar 1999 23:32:57 -0600; Hi all, Lots of folks have said they've been having problems reading my pictures on my FTP site. I had forgotten to add the .jpg suffix to them! I forget about that since Macs don't normally uses suf; /archives//html/Amps/1999-03/msg00355.html (7,984 bytes)
375. [AMPS] CW amplifier progress (well, daydream progress) -- lon g (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 17 Mar 99 09:39:08 -0600; I thought that was just a phenomena that happened in the US! 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.con; /archives//html/Amps/1999-03/msg00366.html (7,644 bytes)
376. [AMPS] Chokes and Dipping chokes? (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 17 Mar 99 10:31:59 -0600; In the tank circuit, the choke IS shorted in terms of RF. Rich is correct. At one end of the choke, you have the HV bypass caps. At the other end, you go thru your DC blocking cap and the Tune C. Tu; /archives//html/Amps/1999-03/msg00375.html (9,877 bytes)
377. [AMPS] Excel 9x (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 17 Mar 99 10:33:34 -0600; I think they do, Rich. 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: a; /archives//html/Amps/1999-03/msg00376.html (7,025 bytes)
378. [AMPS] Corrected Amp Pics (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 17 Mar 99 17:06:04 -0600; Thanks for the comments on the amp. It's done in Excel 97/98 format. 73, Jon KE9NA -- Jon Ogden jono@enteract.com www.qsl.net/ke9na "A life lived in fear is a life half lived." -- FAQ on WWW: http:/; /archives//html/Amps/1999-03/msg00389.html (7,394 bytes)
379. [AMPS] Chokes and Dipping chokes? (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 18 Mar 99 09:17:49 -0600; True, Dick, true. If Tune C is maxed out than Xc could be rather large so your point is well taken. That's one of the reasons why I measured the dip with the choke shorted and just hooked up in circ; /archives//html/Amps/1999-03/msg00408.html (9,255 bytes)
380. [AMPS] Follow Up on the SB-220 Follow UP (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Thu, 18 Mar 99 09:27:04 -0600; [snip] Walter, I seriously doubt changing the parasitic suppressors back to Heath's, AG6K's, KM1H's or whomever's will solve your problem. Something else is amiss. It would be very hard indeed for a; /archives//html/Amps/1999-03/msg00409.html (9,392 bytes)

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