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Total 415 documents matching your query.

281. Re: [Amps] Loading SB-220 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 03 Mar 2007 23:18:58 -0500
Jay, the people whose advice you're following are simply wrong. There is no series resonance in the SB-220 plate choke that would affect performance or cause damage in either the 18 or 24 MHz band. T
/archives//html/Amps/2007-03/msg00046.html (14,128 bytes)

282. Re: [Amps] Gas arc tube Bourns 2027-15 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 11 Mar 2007 17:42:48 -0400
Sad news - this looks like the beginning of the end of Mouser's "no minimum order" policy. If you have to buy $1.47 parts in 100-pax, doesn't that mean a minimum order of at least $150? At least for
/archives//html/Amps/2007-03/msg00157.html (7,287 bytes)

283. Re: [Amps] Amp Supply LK500-zc tube asymmetry (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 20 Mar 2007 08:25:52 -0400
My personal suspicion is that the series R is an ill-conceived attempt at a "glitch resistor" that will act like a big fuse if something fails or arcs, protecting the tubes. AS for your one tube glow
/archives//html/Amps/2007-03/msg00237.html (11,127 bytes)

284. Re: [Amps] AMP Reflector Quality of Information (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 20 Mar 2007 08:37:39 -0400
I don't want to take sides here, as Dick seems to, but I have been on this amps reflector since it began. There are some extraordinarily strong egos in the amps community, and some intense bad blood
/archives//html/Amps/2007-03/msg00239.html (9,851 bytes)

285. Re: [Amps] Amp Supply LK500-zc tube asymmetry (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 20 Mar 2007 09:34:45 -0400
Sure, no argument - though problems in one tube (2 and 4) seem to be pretty well ruled out by the fact that it is always the front tube that glows more brightly, regardless of which tube is in which
/archives//html/Amps/2007-03/msg00246.html (8,662 bytes)

286. Re: [Amps] 8 pin male sockets (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 27 Mar 2007 13:09:00 -0400
Try www.radiodaze.com, or www.electronicsplus.com (more expensive), found by Googling "octal plug". 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2007-03/msg00367.html (7,476 bytes)

287. Re: [Amps] RE : amp hardware (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 10 Apr 2007 16:53:43 -0400
My SB-220 has a lot of American-style coarse metal tapping screws to hold on the top cover, but it also has some special little press-in fixtures under the front edge of the chassis - I believe these
/archives//html/Amps/2007-04/msg00065.html (9,877 bytes)

288. Re: [Amps] HF-2000 amp problem? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 16 Apr 2007 10:27:49 -0400
I think the opposite is true. But is there anything truly wrong with tuning and loading for maximum output at a given drive level? Then if you want to improve IMD, isn't the conventional wisdom to in
/archives//html/Amps/2007-04/msg00166.html (10,350 bytes)

289. Re: [Amps] sb220 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 29 Apr 2007 21:59:50 -0400
My impression is that the 1 KW limit was regulatory rather than technical. The amplifier is capable of rather more - mine puts out 900-1200 watts depending on band (including the exciter power, of co
/archives//html/Amps/2007-04/msg00371.html (7,872 bytes)

290. Re: [Amps] sb220 [clarification] (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 30 Apr 2007 06:01:02 -0400
Sorry, I should have qualified that -- it's CW, key down, with the switch in the SSB position. 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.com http
/archives//html/Amps/2007-04/msg00374.html (9,103 bytes)

291. Re: [Amps] sb220 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 30 Apr 2007 06:17:00 -0400
Well, there goes another myth of my youth - thanks for clearing up the exciter power issue. As for power output, my decently-calibrated wattmeter says my SB-220 has been producing roughly 175% the de
/archives//html/Amps/2007-04/msg00375.html (9,496 bytes)

292. [Amps] QRO-Stuff (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 27 Jun 2007 15:02:33 -0400
Some of their prices are very attractive, but I wonder if anyone has had experience, good or otherwise, with this particular seller. They claim to have warehousing in Texas and offer fast service fro
/archives//html/Amps/2007-06/msg00156.html (11,218 bytes)

293. Re: [Amps] Prime Instruments/Ameritron and MFJ/Ameritron (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 22 Oct 2007 08:27:30 -0400
If you look at all the Ameritron tube lined up on the table at Dayton, you can see two distinct families. I personally prefer the looks of the AL-1200/AL-1500 "family", but it would be interesting to
/archives//html/Amps/2007-10/msg00235.html (7,532 bytes)

294. [Amps] Import Tube in AL-1500F (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 06 Nov 2007 14:04:01 -0500
Does anyone know the source of the tube used in this low-cost version of the AL-1500 ($400 less than the Eimac version)? Any experience with it? 73, Pete N4ZR The World HF Contest Station Database Fu
/archives//html/Amps/2007-11/msg00089.html (6,631 bytes)

295. Re: [Amps] Grid Protection Circuit for Titan 425 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 20 Nov 2007 09:09:02 -0500
... Is this possibly the dreaded power spike that has been discussed from time to time here? IIRC, Icoms are particularly but not uniquely susceptible 73, Pete _______________________________________
/archives//html/Amps/2007-11/msg00283.html (8,013 bytes)

296. Re: [Amps] Peter W Dahl Co (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 07 Dec 2007 13:58:45 -0500
Maybe more to the point, is there somebody on this reflector with some uncommitted capital and an urge to take over the business. Maybe it's just my ham perspective, but I'm not aware of anyone else
/archives//html/Amps/2007-12/msg00036.html (9,081 bytes)

297. Re: [Amps] re dishtronix amp (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 22 Jan 2008 14:29:25 -0500
I don't know whether the Dishtronix amp is any good, but the pricing isn't that nutty - there are a number of people running 2 Alpha 87As or two Acom 2000A amplifiers for SO2R contesting. If the SO2R
/archives//html/Amps/2008-01/msg00148.html (12,727 bytes)

298. Re: [Amps] MLA-2500 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 25 Jan 2008 11:43:40 -0500
Have you run the amp into a 50-ohm dummy load? It really doesn't make sense to me that the load cap would be near minimum (or maximum) capacitance into a 50-ohm load on all bands. As for gold sputter
/archives//html/Amps/2008-01/msg00178.html (9,647 bytes)

299. Re: [Amps] commercial amplifier cooling (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 14 Feb 2008 06:54:55 -0500
I don't know offhand what the L4 uses as its cooling blower, but my SB-220 has a large fan (rather than a squirrel-cage blower) that is mounted in the back of the cabinet and blows directly on the tu
/archives//html/Amps/2008-02/msg00092.html (8,421 bytes)

300. Re: [Amps] commercial amplifier cooling (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 14 Feb 2008 16:41:00 -0500
I bought a couple of 80mm 115 volt AC fans and wired them in series, so they are a little quieter - one hangs behind my principal transceiver and helps me keep it cool, while the other sits on top of
/archives//html/Amps/2008-02/msg00096.html (8,989 bytes)

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