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1. Re: [Amps] Advice (score: 1): Author: Gudguyham@aol.com; Date: Wed, 2 Dec 2009 18:24:49 EST; Save money and time. Sell the LK and buy a ready-made SB200 conversion from one of the experts who do that. W1QJ is one of those guys. Standard disclaimer .. good guy to do business with from a satis; /archives//html/Amps/2009-12/msg00051.html (8,572 bytes)
2. Re: [Amps] Advice (score: 1): Author: Gudguyham@aol.com; Date: Wed, 2 Dec 2009 18:23:32 EST; There is a construction article in the West Coast Handbook that uses a single 3-400 that you could use as a guide. _______________________________________________ Amps mailing list Amps@contesting.co; /archives//html/Amps/2009-12/msg00050.html (7,023 bytes)
3. Re: [Amps] SB-220: 1,800 Watts Output (score: 1): Author: Gudguyham@aol.com; Date: Tue, 1 Dec 2009 16:16:25 EST; The 3KA is a 3000 watt PEP input (2000 watt nominal output) linear amplifier ..." On the other hand - I wouldn't think a direct comparison to a SB-220 (even with a Dahl transformer) would be appropri; /archives//html/Amps/2009-12/msg00007.html (7,798 bytes)
4. Re: [Amps] SB-220: 1,800 Watts Output (score: 1): Author: Gudguyham@aol.com; Date: Tue, 1 Dec 2009 16:15:19 EST; But you can't get there with 100 watts of drive. 73 Gary K4FMX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2009-12/msg00006.html (9,908 bytes)
5. Re: [Amps] SB-220: 1,800 Watts Output (score: 1): Author: Gudguyham@aol.com; Date: Tue, 1 Dec 2009 15:50:27 EST; As I recall Henry Radio rated one of their "pair of 3-500" amplifiers at 3000KW input, at 60% eff. (not unlikely) that would be 1800 watts PEP output.....NO? In a message dated 11/30/2009 12:30:32 P.; /archives//html/Amps/2009-12/msg00003.html (7,666 bytes)
6. Re: [Amps] SB-220: 1,800 Watts Output (score: 1): Author: Gudguyham@aol.com; Date: Mon, 30 Nov 2009 11:48:51 EST; I may be quite possible that the Sb-220 WILL do 1800 watts PEP output with the special Peter Dahl transformer. A regular SB-220 on 6 meters could do 1600 PEP with a standard transformer. Check this o; /archives//html/Amps/2009-11/msg00305.html (8,332 bytes)
7. Re: [Amps] AL-1200 Relay Confusion (score: 1): Author: gudguyham@aol.com; Date: Sat, 24 Oct 2009 14:22:51 -0400; THE STEP START RELAY IS 120 VAC AND THE CONTACTOR RELAY IS 12 VDC. If you see it anyway else your not reading a schematic correctly If the AC impedance is high enough ........ Don WA4NPL the schemati; /archives//html/Amps/2009-10/msg00318.html (8,156 bytes)
8. [Amps] Amplifier scenario question (score: 1): Author: Gudguyham@aol.com; Date: Thu, 17 Sep 2009 06:41:57 EDT; As a prelude to my next post, I would like to ask this question for the benefit of some of the newer members here. What could happen if I am driving an amplifier with a full 100 watts and suddenly (u; /archives//html/Amps/2009-09/msg00227.html (6,990 bytes)
9. Re: [Amps] to buy 8 pieces 200uF 500V caps (score: 1): Author: Gudguyham@aol.com; Date: Sun, 13 Sep 2009 15:00:35 EDT; Laszlo, why not use 8 450v caps? 8 of them will give you a working voltage of 3600v that is plenty for a Kenwood 922. Give me physical size of caps and I may have replacement caps for you. Lou In a m; /archives//html/Amps/2009-09/msg00180.html (8,008 bytes)
10. Re: [Amps] LK500-ZB (score: 1): Author: Gudguyham@aol.com; Date: Wed, 9 Sep 2009 22:36:59 EDT; just got done working on mine. I found last week that the grid shunt resistor was blown and someone on the list here suggested that it may be exactly that and it was! ________________________________; /archives//html/Amps/2009-09/msg00141.html (7,355 bytes)
11. Re: [Amps] SB221 Low Power Help (score: 1): Author: Gudguyham@aol.com; Date: Wed, 9 Sep 2009 20:08:43 EDT; If you have a bad tube low emission I mean, it very well may change the input tuning and therefore you may think your input tuning is faulty when its not. In a message dated 9/9/2009 5:05:57 P.M. Pac; /archives//html/Amps/2009-09/msg00138.html (12,561 bytes)
12. Re: [Amps] Fixing grid to cathode shorts (score: 1): Author: Gudguyham@aol.com; Date: Wed, 9 Sep 2009 19:55:23 EDT; Recently in another venue Tom W8JI stated a 3-500 with low emission could be souped up by applying higher filament voltage for a period of time, however he did not state what the higher voltage was o; /archives//html/Amps/2009-09/msg00136.html (8,522 bytes)
13. Re: [Amps] LK-500 Grid Current issue (score: 1): Author: Gudguyham@aol.com; Date: Tue, 1 Sep 2009 00:55:42 EDT; Hello all... I have been working on restoring an LK-500 NT to operating condition and it has a funny grid current issue. When I switch the meter switch over on the front to measure the grid current,; /archives//html/Amps/2009-08/msg00666.html (7,239 bytes)
14. Re: [Amps] SB-220 bias question (score: 1): Author: Gudguyham@aol.com; Date: Sun, 30 Aug 2009 13:33:03 EDT; To insist that circulating current INCREASES when drive is reduced is utter nonsense. Period. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contes; /archives//html/Amps/2009-08/msg00640.html (8,079 bytes)
15. Re: [Amps] SB220 bias thread (score: 1): Author: Gudguyham@aol.com; Date: Sun, 30 Aug 2009 10:04:16 EDT; I found his unit, with fixed 3:1 pulses, did not approximate my voice as close as I would like. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont; /archives//html/Amps/2009-08/msg00632.html (6,697 bytes)
16. Re: [Amps] SB-220 bias question (score: 1): Author: Gudguyham@aol.com; Date: Sat, 29 Aug 2009 20:56:36 EDT; Reducing the power output without changing the plate voltage will result in a miss-tuned condition. If the pi-network is tuned for full output and the drive reduced (power adjusted). If the output is; /archives//html/Amps/2009-08/msg00622.html (8,823 bytes)
17. Re: [Amps] SB-220 bias question (score: 1): Author: Gudguyham@aol.com; Date: Sat, 29 Aug 2009 20:52:53 EDT; But then the failure will probably be blamed on a parasitic rather than misuse. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailm; /archives//html/Amps/2009-08/msg00621.html (7,894 bytes)
18. Re: [Amps] SB-220 bias question (score: 1): Author: Gudguyham@aol.com; Date: Sat, 29 Aug 2009 20:30:52 EDT; No, I didn't miss the point. Running an amplifier in Show me where I said that _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailma; /archives//html/Amps/2009-08/msg00616.html (8,291 bytes)
19. Re: [Amps] [ham_amplifiers] KM1H, CARL SAID: Toll_Free puts it in persepective: (score: 1): Author: gudguyham@aol.com; Date: Sat, 29 Aug 2009 13:39:12 -0400; one may be able to have the suppressor coaxed into toasting morning toast. the Ni-Cr ribbon in his uppressor began to glow like an electrical heater element a very I'm not going to be baited into thi; /archives//html/Amps/2009-08/msg00605.html (12,225 bytes)
20. Re: [Amps] SB-220 bias question (score: 1): Author: gudguyham@aol.com; Date: Sat, 29 Aug 2009 13:17:26 -0400; NO WAY To do so you have to modify the pi-net, as the output impedance of the tube will be much higher 73 Peter To do so you have to modify the pi-net, as the output impedance of the tube will be muc; /archives//html/Amps/2009-08/msg00604.html (8,792 bytes)

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