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1. Re: [Amps] Henry 2KD-5 10 Meter mod (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 12 Nov 2009 15:56:39 -0800; 2KD-5 requires unblocking the 5th bandswitch position, adding the 10m coil and capacitors, and also changing the plate tank coil that is used for 10m. The Henry "kit" came with all these parts, and I; /archives//html/Amps/2009-11/msg00174.html (7,802 bytes)
2. Re: [Amps] PSU design question (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Fri, 6 Nov 2009 10:55:08 -0800; It's to allow metering in the return lead (close to ground potential) instead of in the B+ lead (where high voltage may have to be brought to a panel meter, etc). I usually float the HV return just s; /archives//html/Amps/2009-11/msg00085.html (8,652 bytes)
3. Re: [Amps] AL 80B (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 25 Oct 2009 16:44:34 -0700; Well, if there's no high voltage, obviously there's a problem and the amp can't produce any output power (without high voltage!). Is this a "new" amp or a "used" one? Do you feel comfortable working; /archives//html/Amps/2009-10/msg00324.html (10,225 bytes)
4. Re: [Amps] AL 80B (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 25 Oct 2009 14:27:26 -0700; Phil, what are you driving it with? How much drive power and what mode? When you drive it does it indicate any grid current? Plate current? What's the high voltage meter indicate? WB2WIK/6 __________; /archives//html/Amps/2009-10/msg00322.html (8,022 bytes)
5. Re: [Amps] FL-2100b (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Fri, 9 Oct 2009 11:33:56 -0700; Probably. Every FL-2100B I've ever come across was a restoration project, either in the past, or currently, or in the making. It's a knockoff of an SB-200, but Heath did a better job. WB2WIK/6 HELP !; /archives//html/Amps/2009-10/msg00158.html (8,637 bytes)
6. Re: [Amps] PEP Reading Wattmeter (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 1 Oct 2009 15:54:44 -0700; I've used the Autek WM-1s for many years. Solid, stable product, will indicate output power with one dit at 30 wpm. It's a tad off on six meters (although the coupler hasn't any loss, it's just accur; /archives//html/Amps/2009-10/msg00001.html (7,580 bytes)
7. Re: [Amps] TENTEC TITAN 425 price? (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Fri, 21 Aug 2009 15:49:06 -0700; You have an extra restriction? It's 200W for me! ;-) WB2WIK/6 No, I don't bother using an outboard amp on 30m. If I need another 3dB, I just push harder on the key.. It amazes me how many US amateurs; /archives//html/Amps/2009-08/msg00372.html (7,476 bytes)
8. Re: [Amps] SB-200 6 meter conversion (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 9 Aug 2009 16:39:19 -0700; If Ig is really only 50-60mA, that seems very low, actually. Should probably be ~100 mA when fully driven and fully loaded. At least that would be more typical for a pair of 572Bs. 73 Steve WB2WIK/6; /archives//html/Amps/2009-08/msg00175.html (17,266 bytes)
9. Re: [Amps] SB-200 6 meter conversion (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 9 Aug 2009 11:15:09 -0700; I suspect so also. I don't think a pair of tubes would last long at 300mA Ig! ________________________________ Since the grid position is only 200ma FS and 100ma is considered max I suspect it is a c; /archives//html/Amps/2009-08/msg00158.html (15,145 bytes)
10. Re: [Amps] SB-200 6 meter conversion (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 9 Aug 2009 09:59:42 -0700; 300mA for a pair of 572Bs is a lot of grid current...I suspect the output doesn't look very clean, especially if you can do an IMD check (which requires a lot of stuff most don't have, but maybe you; /archives//html/Amps/2009-08/msg00150.html (12,918 bytes)
11. Re: [Amps] PIN diodes and QSK (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Fri, 7 Aug 2009 08:35:24 -0700; Because they often "won't" do. P-N devices carefully selected for this application still aren't as linear as PIN devices, don't have as much isolation when turned off, and often won't work well down; /archives//html/Amps/2009-08/msg00130.html (7,772 bytes)
12. Re: [Amps] DRAKE 6 Meter Amp (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 6 Aug 2009 15:39:37 -0700; Slow electrons. Thats what I said hours ago. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ________; /archives//html/Amps/2009-08/msg00108.html (12,289 bytes)
13. Re: [Amps] DRAKE 6 Meter Amp (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 6 Aug 2009 10:26:39 -0700; I'm guessing it's a hazy memory. Drake made no 6m amps I've ever seen, but Swan made two of them: The MK-VI and the MK-VIB. The former had an internal power supply, the latter was two units, with the; /archives//html/Amps/2009-08/msg00095.html (9,662 bytes)
14. Re: [Amps] DRAKE 6 Meter Amp (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 6 Aug 2009 09:48:27 -0700; Drake?? You sure you don't mean Swan?? I don't recall Drake every making any sort of 6m amp, at all. The TR-6 ran about 200W PEP output all by itself, though... WB2WIK/6 At our weekly lunch the other; /archives//html/Amps/2009-08/msg00093.html (7,540 bytes)
15. Re: [Amps] Grounded Grid(Screen) 4CX250B power gain (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 19 Jul 2009 17:52:05 -0700; Can you measure IMD? That would be the telling data. WB2WIK/6 ________________________________ Hi, George, I just modyfy the Henry TEMPO 2001 convert the 3CX400A7 to 4CX250B in GG configation, tied t; /archives//html/Amps/2009-07/msg00220.html (9,645 bytes)
16. Re: [Amps] Tube choice for SB-200 on 6 meters (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Sun, 12 Jul 2009 17:45:29 -0700; What's wrong with running 3-500Zs "cherry red?" I think that's a fairly natural color for them; they cool by emission, mostly, and "red" is a pretty normal color. Bright orange/yellow is hotter, and; /archives//html/Amps/2009-07/msg00170.html (18,855 bytes)
17. Re: [Amps] AL-1200 MO' Powah (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 2 Jul 2009 14:29:33 -0700; AL-82, AL-1200 and AL-1500 all use the same HV transformer, Ameritron P/N 406-1418-1D... -WB2WIK/6 Could have been an AL-82 xfmr. Its like putting an Olds engine in a Caddy but GM got caught! Carl KM; /archives//html/Amps/2009-07/msg00070.html (7,781 bytes)
18. Re: [Amps] Roger's complete correction on tubes (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Thu, 2 Jul 2009 11:42:36 -0700; The Hunter Bandit ran a pair of 3-400Zs. There's a lot of them around. I never owned one, but I've worked on a couple. eHam.net review is here: http://www.eham.net/reviews/detail/2532 -WB2WIK/6 The B; /archives//html/Amps/2009-07/msg00054.html (9,290 bytes)
19. Re: [Amps] Question about large solid-state HV rectifier - ratings plusany value???? (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Mon, 8 Jun 2009 11:20:20 -0700; Why trash them? They're probably still good. I don't know the ratings. "ts" may be "Transitron Semiconductor," who was one of many companies making similar HV rectifier assemblies back then. WB2WIK/6; /archives//html/Amps/2009-06/msg00030.html (9,222 bytes)
20. Re: [Amps] Meter shunt (score: 1): Author: "Steve Katz" <stevek@jmr.com>; Date: Fri, 29 May 2009 10:09:45 -0700; Surely, this depends on the meter. It's easy enough to measure and find out. Most of my "1mA" to "100mA" meters here (Simpsons, Westons) have those shunts built in. "1A" and higher meters almost alwa; /archives//html/Amps/2009-05/msg00258.html (8,049 bytes)

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