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1. [Amps] Preparation for Amp construction (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Thu Jul 3 09:09:35 2003; Jim, that's probably a Measurements Model 59, by your description. Measurements was in Boonton, NJ for sure and when it dissolved many of the team went to Boonton Electronics, to Boonton Radio, or to; /archives//html/Amps/2003-07/msg00017.html (10,066 bytes)
2. [Amps] Power supply design considerations (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Tue Jul 1 09:50:15 2003; /archives//html/Amps/2003-07/msg00180.html (9,892 bytes)
3. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Jun 18 08:12:45 2003; /archives//html/Amps/2003-06/msg00123.html (9,586 bytes)
4. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Thu Jun 19 08:31:52 2003; Hi Rich, PINs are readily available to 1000Vpk and of course can be placed in series for higher voltage applications. Remember, a PIN is not a P-N junction device and doesn't really have a "PIV" rati; /archives//html/Amps/2003-06/msg00134.html (14,081 bytes)
5. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Thu Jun 19 08:32:11 2003; 2000V is no problem at all for a pair of PINs in series. Actually, for such a high power level as 10kW, I'd recommend at least two in series, maybe more, in order to achieve excellent isolation when; /archives//html/Amps/2003-06/msg00138.html (16,674 bytes)
6. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri Jun 20 08:21:48 2003; Hi Peter, I didn't see the original question for some reason. I wouldn't use PINs for a high-powered bandswitch on the hi-Z end of the plate tank, and I doubt that many have done so successfully; alt; /archives//html/Amps/2003-06/msg00152.html (13,817 bytes)
7. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri Jun 20 08:21:53 2003; /archives//html/Amps/2003-06/msg00153.html (19,002 bytes)
8. [Amps] 4CX250B/F (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri Jun 20 08:21:59 2003; Guillermo, I'm not sure what RCA manual you're looking at, but the 4CX250B/7203 definitely has a warm-up time requirement, and I've always used at least 90 seconds, preferably 120 seconds, via a elec; /archives//html/Amps/2003-06/msg00154.html (7,925 bytes)
9. [Amps] electronic switching (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri Jun 20 08:22:15 2003; /archives//html/Amps/2003-06/msg00157.html (9,513 bytes)
10. [Amps] qb3.5/750 on six tank circuit question (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Tue May 6 09:57:00 2003; I've always used: TUNE = 2-30 pF vacuum variable (actual range needed c. 2-10 pF) LOAD = 200 pF air variable, similar to the TUNE cap often used in HF amplifiers L = 3 to 4 turns 1/4" copper tubing,; /archives//html/Amps/2003-05/msg00035.html (8,986 bytes)
11. [Amps] Info needed on coupler design (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Tue May 6 09:57:13 2003; Why not just ask Chip, N6CA? http://www.anglelinear.com -WB2WIK/6 "Success is the ability to go from failure to failure with no loss of enthusiasm." -Winston Churchill; /archives//html/Amps/2003-05/msg00040.html (8,416 bytes)
12. [Amps] Johnson 6N2 kilowatt (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri May 9 08:47:24 2003; Why not stick with 4CX250Bs? The power supply in the 6n2 T-bolt can't deliver more than about 1 kW DC anyway, seems like 4CX400s or a 4CX800 would be a bit overkill for the rest of the amp. -WB2WIK/6; /archives//html/Amps/2003-05/msg00067.html (7,066 bytes)
13. [Amps] 4-1000 output (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Sat May 24 09:58:14 2003; Power output with a tank that doesn't resonate? Not likely. Have you used a GDO to find if the tank is actually resonant in each band? (And to find that hopefully the plate RF choke is NOT?) -WB2WIK/; /archives//html/Amps/2003-05/msg00178.html (7,958 bytes)
14. [Amps] modern 811 designs? (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Fri Apr 4 12:43:17 2003; Dan, most 811 designs probably are 40 years old! But you might consider making a copy of the Ameritron AL-811...its manual contains complete schematic diagrams and parts lists, and Ameritron even sel; /archives//html/Amps/2003-04/msg00022.html (9,086 bytes)
15. [Amps] Newbie RF amp construction question (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Apr 16 10:55:04 2003; /archives//html/Amps/2003-04/msg00170.html (7,796 bytes)
16. [Amps] NCL 2000 (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Apr 16 11:04:15 2003; What does "flying out of gear" mean? "Success is the ability to go from failure to failure with no loss of enthusiasm." -Winston Churchill; /archives//html/Amps/2003-04/msg00172.html (7,623 bytes)
17. [Amps] NCL 2000 (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Apr 16 12:22:40 2003; If the relay trips, you're probably drawing too much current. I wouldn't use the NCL2000 on a 110Vac line, at least not at full power. You might try re-strapping the AC block on the rear panel for 22; /archives//html/Amps/2003-04/msg00175.html (8,726 bytes)
18. [Amps] New question (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Mar 5 11:57:06 2003; I have some suggestions, see below..... -WB2WIK/6; /archives//html/Amps/2003-03/msg00187.html (9,713 bytes)
19. [Amps] Alpha 86 (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Wed Mar 5 18:09:55 2003; In XE-land, a Corona washer is a guy who washes out the Corona bottles after they've been used. "Success is the ability to go from failure to failure with no loss of enthusiasm." -Winston Churchill; /archives//html/Amps/2003-03/msg00211.html (10,614 bytes)
20. [Amps] Use of Manual T/R Switches (score: 173): Author: stevek at jmr.com (Steve Katz); Date: Thu Mar 6 10:58:44 2003; The knife switch is cool, but I think using ordinary household 120V wall-installed electric light switches is better. Next, in a contest situation you'll get a great deal of exercise, but all indoors; /archives//html/Amps/2003-03/msg00261.html (10,776 bytes)

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