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Total 650 documents matching your query.

341. [AMPS] IMD (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Mon, 17 Sep 2001 11:37:22 -0700
operation is not the correct one? Darn...-WB2WIK/6>... -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problem
/archives//html/Amps/2001-09/msg00289.html (8,774 bytes)

342. [AMPS] SB-200 Relay (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Mon, 17 Sep 2001 12:36:54 -0700
It's $18 for an exact replacement new one (P/N RY-200) from <http://www.harbachelectronics.com> -WB2WIK/6 -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administra
/archives//html/Amps/2001-09/msg00291.html (8,189 bytes)

343. [AMPS] Distortion, amp design, and 813s (newbie alert!!) (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Wed, 19 Sep 2001 14:44:37 -0700
...or, you could sell the four 813's to someone who likes to make lamps and use the proceeds to buy a pair of 3-500Z's. That would be my choice. -WB2WIK/6 "Each success only buys an admission ticket
/archives//html/Amps/2001-09/msg00350.html (11,235 bytes)

344. [AMPS] New tube in a SB230 (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Wed, 26 Sep 2001 10:26:10 -0700
8874 with little pressurized compartment installed and blower attached? Haven't done it, but it always seemed the space was available and Heath used the conduction cooled tube just because that was a
/archives//html/Amps/2001-09/msg00421.html (8,020 bytes)

345. [AMPS] New tube in a SB230 (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Wed, 26 Sep 2001 11:10:28 -0700
Is there space for the larger anode of the 3CX800A7? If so, seems a wise choice (run cooler, last longer...) WIK "Each success only buys an admission ticket to a more difficult problem." -- Henry Kis
/archives//html/Amps/2001-09/msg00424.html (9,433 bytes)

346. [AMPS] New tube in a SB230 (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Wed, 26 Sep 2001 11:53:45 -0700
Could always do what Dentron did in the '2000, mount an 8877 sideways and hope for the best... "Each success only buys an admission ticket to a more difficult problem." -- Henry Kissinger -- FAQ on W
/archives//html/Amps/2001-09/msg00425.html (10,827 bytes)

347. [AMPS] 3-500Z (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Fri, 28 Sep 2001 10:55:42 -0700
Is the 500mA limit one imposed on safe conditions for the anode, or for the cathode? The question is based on SOA regarding Pdiss; I run my AL80B at all sorts of (intermittant) high current levels bu
/archives//html/Amps/2001-09/msg00471.html (9,317 bytes)

348. [AMPS] The 3-500Z, having been officially beaten to death... (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Fri, 28 Sep 2001 11:44:21 -0700
...is now shattered glass and bits of metal. However, I do have a question, if anyone knows: AL-80B uses side-flow air cooling which appears substantial in volume but does not use pressurized cooling
/archives//html/Amps/2001-09/msg00475.html (10,137 bytes)

349. [AMPS] RE: 3-500z cooling (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Fri, 28 Sep 2001 14:03:27 -0700
[Steve Katz] I realize that, although I have not made any measurements to confirm how effective this is. I'm questioning why Henry, Drake and others used centrifugal blowers and glass chimneys, at o
/archives//html/Amps/2001-09/msg00480.html (8,173 bytes)

350. [AMPS] RE: 3-500z cooling (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Fri, 28 Sep 2001 15:26:26 -0700
Interesting about the AL82. I have an AL-80B, and have owned in the past a variety of 3-500Z amps from SB-220's to Henry 2K's to Drake L4B's, and one old Swan Mark II, and oh, what was that-?, I thin
/archives//html/Amps/2001-09/msg00484.html (12,416 bytes)

351. [AMPS] Thanks for 2x 813 info (score: 1)
Author: stevek@jmr.com (Steve Katz)
Date: Fri, 28 Sep 2001 15:32:20 -0700
Let me know what you're looking for in a plate xfmr, I may have something suitable. Probably something much more suitable for a FW bridge, as opposed to a doubler, which places more demand on the xfm
/archives//html/Amps/2001-09/msg00485.html (8,178 bytes)

352. RE: [BULK] - [Amps] NCL 2000? (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Mon, 29 Sep 2003 07:46:17 -0700
It's a very pretty amplifier that is, of course, also quite old, c. 1966 or so. As such, if it has its original filter capacitors they should be replaced, along with their equalizing resistors. The 8
/archives//html/Amps/2003-09/msg00211.html (8,076 bytes)

353. RE: [BULK] - [Amps] NCL 2000? (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Tue, 30 Sep 2003 07:58:59 -0700
Hi Helge, Re: Your 4CX250B comments. I've had the same set of Eimac 7203/4CX250Bs in my two meter amplifier since 1981. Run it with Ep = 2500V, Eg2 = 350V, lots of air, and 1 kW PEP output power for,
/archives//html/Amps/2003-10/msg00006.html (11,505 bytes)

354. RE: [BULK] - [Amps] NCL 2000? (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Tue, 30 Sep 2003 10:17:10 -0700
Hi Rich, I'll bet the Svetlana mod would be do-able, and probably cheaper than almost any other mod, but I've never tried it. Next time I have an NCL2000 on the bench with dead 8122s (it will eventua
/archives//html/Amps/2003-10/msg00007.html (8,400 bytes)

355. RE: [BULK] - [Amps] AL80 GI7B Conversion... (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Mon, 6 Oct 2003 07:51:36 -0700
Hi Gerry, I don't know about the GI7B and have never used one; however, the unwanted reactance of the AL80 bandswitch and tank wiring, and resonances in the filament choke and HV RF choke, and undesi
/archives//html/Amps/2003-10/msg00053.html (10,084 bytes)

356. RE: [BULK] - [Amps] Soft 8877??? (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Tue, 7 Oct 2003 08:07:55 -0700
Paul, does the plate current ever "dip" in approximate correlation to power output peak? Is there any power output peak??? Your symptoms make me think something slipped in the bandswitch drive chain
/archives//html/Amps/2003-10/msg00062.html (8,481 bytes)

357. RE: [BULK] - Re: [Amps] Getting Back In (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Mon, 10 Nov 2003 07:45:06 -0800
...not to mention requiring hotel rooms with 240V outlets...here in the States, I don't find any like that. WB2WIK/6 "Success is the ability to go from failure to failure with no loss of enthusiasm."
/archives//html/Amps/2003-11/msg00138.html (8,614 bytes)

358. RE: [BULK] - [Amps] need replacement for Pin Diode (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Wed, 19 Nov 2003 07:52:30 -0800
I understand the diodes are about $10 each from Alpha/Crosslink http://www.alpha-amps.com Did you already try them? WB2WIK/6 "Success is the ability to go from failure to failure with no loss of enth
/archives//html/Amps/2003-11/msg00282.html (7,913 bytes)

359. RE: [BULK] - Re: [Amps] Pin Diodes questions (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Fri, 21 Nov 2003 08:04:40 -0800
...anybody know the actual ratings of the KS1001? I've used UM20xx and UM70xx series PINs for years without a single failure, but know nothing about the KS1001. Who makes it? -WB2WIK/6 "Success is th
/archives//html/Amps/2003-11/msg00315.html (9,807 bytes)

360. RE: [BULK] - [Amps] Alpha vs commander? (score: 1)
Author: Steve Katz <stevek@jmr.com>
Date: Mon, 1 Dec 2003 08:11:23 -0800
I'd stick with the Commander. The 374A likely only has two tubes (the original 374 had three) and doesn't really run any more power than the Commander. The bandpass tuning ("no tune") feature of the
/archives//html/Amps/2003-12/msg00010.html (8,099 bytes)

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