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References: [ +from:n4zr@contesting.com: 415 ]

Total 415 documents matching your query.

261. Re: [Amps] R. MEASURES PRAYERS ANSWERED (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 02 Jun 2006 08:41:09 -0400
My SB-220, which was evidently built by a very skilled OT, is unconditionally stable. Construction quality, proper lead lengths, etc. are one consideration. Another may be the tubes used - I have hea
/archives//html/Amps/2006-06/msg00039.html (9,851 bytes)

262. Re: [Amps] SB-220 Bandswitching (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 04 Jun 2006 08:44:34 -0400
I believe it has been suggested before on amps that it's a good idea to replace the bandswitch knob on the SB-220 with one that is very different from the two capacitors - maybe a large bar knob, for
/archives//html/Amps/2006-06/msg00096.html (10,859 bytes)

263. [Amps] Direct-grounding SB-220 grids (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 06 Jun 2006 15:28:03 -0400
I'm thinking about following several people's advice and direct-grounding the grids on my SB-220. I'm told that this can result in a bit more gain and enhanced stability. Merits of the procedure asid
/archives//html/Amps/2006-06/msg00175.html (7,046 bytes)

264. [Amps] teeny copper strap (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 07 Jun 2006 08:37:48 -0400
Before I mail order some copper flashing or go to one of the lightning protection outfits for far more than I'll need, is there any non-radio source of appropriate stuff for grounding my SB-220 grids
/archives//html/Amps/2006-06/msg00194.html (6,615 bytes)

265. Re: [Amps] teeny copper strap (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 07 Jun 2006 10:09:26 -0400
The length is a problem with the SB-220's layout - I had a short one in there but a couple of arcs later.... Interesting idea - I thought the CW about the SB-220 was that it had a transformer that wa
/archives//html/Amps/2006-06/msg00200.html (9,357 bytes)

266. [Amps] copper strap (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 07 Jun 2006 22:00:30 -0400
My sincere thanks to the many who responded to my query, and particularly to the generous folks who offered to send me sheet copper out of their personal supplies. Thanks to hints received, I was abl
/archives//html/Amps/2006-06/msg00213.html (6,476 bytes)

267. Re: [Amps] font sizes (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 21 Jul 2006 10:26:23 -0400
Ctrl+ doesn't work here for some reason, but holding the Ctrl key while moving the scroll wheel on the mouse does. Perhaps differences among e-mail programs. 73, Pete N4ZR ___________________________
/archives//html/Amps/2006-07/msg00763.html (7,968 bytes)

268. Re: [Amps] 3cx3000A7 driver (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 22 Jul 2006 07:40:51 -0400
Or check out his other offerings, like the brain wave analyzer. This guy is a fraudmeister, and e-bay should be ashamed. 73, Pete N4ZR _______________________________________________ Amps mailing lis
/archives//html/Amps/2006-07/msg00845.html (11,239 bytes)

269. [Amps] Filaments show different brightness (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 29 Jul 2006 09:54:00 -0400
Today I was running my SB-220 with the case off, and noticed, to my surprise, that the filaments of the two tubes show quite different brightness reflected off the desk under the amplifier, even on s
/archives//html/Amps/2006-07/msg01288.html (7,498 bytes)

270. [Amps] New FCC Amplifier Rule (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 12 Oct 2006 08:09:21 -0400
The FCC Omnibus R&O released yesterday requires: &sect; 2.815 External radio frequency power amplifiers. ... (1) The external radio frequency power amplifier shall not be capable of amplification in
/archives//html/Amps/2006-10/msg00083.html (7,668 bytes)

271. [Amps] Amplifier Rule Changes in the new R&O (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 14 Oct 2006 08:32:40 -0400
From your FAC: Q. What were the changes eliminating certain restrictions on equipment manufacturers? A. Simply put, the guidelines on external RF amplifiers were clarified. They must still be granted
/archives//html/Amps/2006-10/msg00113.html (7,642 bytes)

272. [Amps] Amplifier Rule Changes in the new R&O (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 14 Oct 2006 08:57:44 -0400
From your FAC: Q. What were the changes eliminating certain restrictions on equipment manufacturers? A. Simply put, the guidelines on external RF amplifiers were clarified. They must still be granted
/archives//html/Amps/2006-10/msg00114.html (8,461 bytes)

273. Re: [Amps] Amplifier Rule Changes in the new R&O (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 14 Oct 2006 09:13:43 -0400
I couldn't agree more, Paul - but my point was precisely that it DOESN'T change anything for manual amps - the only way to meet the requirement is to continue to stop at 15 meters. I'm a little conce
/archives//html/Amps/2006-10/msg00116.html (9,635 bytes)

274. Re: [Amps] Amplifier Rule Changes in the new R&O (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 14 Oct 2006 16:51:28 -0400
Sure, no problem, but would it be hard enough to disable? 73, Pete _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/a
/archives//html/Amps/2006-10/msg00119.html (9,201 bytes)

275. [Amps] Tokyo Hy-Power and Elecraft (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 23 Nov 2006 09:37:38 -0500
I was disappointed to see in QST that the vaunted Hy-Power SS amp turns out to be 1.5 kw INPUT, and ~1000 watts output. Makes it a lot less attractive at that size, weight and probably cost. Also mak
/archives//html/Amps/2006-11/msg00247.html (6,703 bytes)

276. [Amps] 3-500 sockets (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 10 Dec 2006 12:33:55 -0500
I have one socket in my SB-220 that seems particularly prone to melting the solder out of the filament pins on my 3-500Zs. I presume this is because the spring contacts have gradually lost their temp
/archives//html/Amps/2006-12/msg00056.html (6,648 bytes)

277. Re: [Amps] QST Jan 06 (Off topic) (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 19 Dec 2006 07:17:26 -0500
Instead of pursuing this here, why not take it to towertalk@contesting.com, where it will be on topic? 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.
/archives//html/Amps/2006-12/msg00165.html (13,198 bytes)

278. [Amps] What am I missing? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 12 Jan 2007 20:58:50 -0500
January QST has an article on old amplifiers that advocates replacing the input circuits on an SB-221 with simple parallel-tuned circuits for each band. How can these circuits possibly achieve matchi
/archives//html/Amps/2007-01/msg00105.html (7,206 bytes)

279. [Amps] 3-500Z filament desoldering - sequel (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 23 Jan 2007 07:36:49 -0500
With the idea that I'm not the only one whose 3-500 filaments were coming unsoldered in contest operation... I recalled reading a few years ago that someone (W8JI?) theorized that over time the sprin
/archives//html/Amps/2007-01/msg00231.html (7,179 bytes)

280. Re: [Amps] Loading SB-220 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sat, 03 Mar 2007 15:25:09 -0500
I don't think that is correct either, Bob - I use my SB-220 on 12 and 17 in the SSB position all the time. I'd be willing to bet that this advice is based on having arced the tuning capacitor a time
/archives//html/Amps/2007-03/msg00031.html (10,292 bytes)

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