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301. Re: [Amps] grounding grids (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 30 Jul 2009 00:48:54 -0400
and should reduce the need for carefully balancing the tubes. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman
/archives//html/Amps/2009-07/msg00393.html (12,184 bytes)

302. Re: [Amps] Dummy load oil (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 30 Jul 2009 01:16:22 -0400
Well, as long as I've created the image, let me *paint* a broader image. Did you know?...A cow can cough "explosively"? There are many analogies floating through my head at the moment, but for the me
/archives//html/Amps/2009-07/msg00396.html (8,112 bytes)

303. Re: [Amps] HT-33A (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Fri, 31 Jul 2009 14:47:27 -0400
I know this is a revival of an old topic, but I thought it worth mentioning. Also, please keep the CCs to a minimum as this one disappeared into the moderators well due to too many recipients. Surpri
/archives//html/Amps/2009-07/msg00444.html (12,275 bytes)

304. Re: [Amps] spray painting metal (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Fri, 31 Jul 2009 15:28:07 -0400
Above all, do the painting in a well ventilated area and expect paint on every thing in that area when you finish. If you do the painting outside as I often do, make sure your neighbors cars are not
/archives//html/Amps/2009-07/msg00445.html (12,408 bytes)

305. Re: [Amps] Asynchronous coax matching transformer (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 01 Aug 2009 21:21:33 -0400
20 db? I've strung a whole series of connectors together and didn't get half a db. 275 feet of coax (LMR 400) with connectors at the rig to grounding panel/Polyphaser(2), cable to base of tower (2),
/archives//html/Amps/2009-08/msg00014.html (18,721 bytes)

306. Re: [Amps] why a 200 watt transceiver? (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 03 Aug 2009 04:47:31 -0400
You must be looking at the cheap models. Both yaesu and Icom have 100 watt models that run close to $13,000USD You'll know if I ever won the lottery as I'd get two of the big Icoms (one for the Den a
/archives//html/Amps/2009-08/msg00047.html (8,801 bytes)

307. Re: [Amps] HT-33A (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 30 Jul 2009 23:08:39 -0400
Surprising is all of the HT-33As I've seen had the holes punched for the additional VR tubes, but no tubes. The entire amp is easy to recondition unless it has corrosion on the chassis. There really
/archives//html/Amps/2009-08/msg00060.html (11,465 bytes)

308. Re: [Amps] Simpson 260 question (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 04 Aug 2009 04:04:04 -0400
We always used a high voltage probe with the 260. It almost look like one of the old sci fi movie ray guns. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2009-08/msg00077.html (11,740 bytes)

309. Re: [Amps] I need transfer switch information (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 10 Aug 2009 04:31:42 -0400
Why? You do not have to switch the neutral and ground which tie together in the service box. Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://
/archives//html/Amps/2009-08/msg00211.html (8,105 bytes)

310. Re: [Amps] I need transfer switch information (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 10 Aug 2009 04:37:01 -0400
But what's with the 3PDT switch? I simply ganged two main circuit breakers and fed the inputs to the outputs. That's the same way the commercial one was built I looked at. I basically switch the whol
/archives//html/Amps/2009-08/msg00213.html (9,159 bytes)

311. Re: [Amps] transfer switch (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Tue, 11 Aug 2009 00:10:52 -0400
Be sure to check the code in your area. You may need to have the transfer switch in a sub panel with the breakers for those circuits all in there. I had to do that here. OTOH I still have about 5 cir
/archives//html/Amps/2009-08/msg00261.html (9,191 bytes)

312. Re: [Amps] TRANSFER SWITCH (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Wed, 12 Aug 2009 04:00:52 -0400
Momentarily? Here they have to be solidly connected. But even if they aren't, at 4 points they are ground. AT the power pole, at the generator, and directly connected in the panel and sub panel. IOW
/archives//html/Amps/2009-08/msg00278.html (8,712 bytes)

313. [Amps] Be Careful Measuring those voltages. (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sun, 16 Aug 2009 18:14:26 -0400
Many years ago, as in the 50's I took a correspondence course on electronics. One of the first things we did was build a volt meter. A few years later I needed to check the plate voltage on my HT-44
/archives//html/Amps/2009-08/msg00337.html (9,858 bytes)

314. Re: [Amps] suppressor material (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Sat, 22 Aug 2009 18:12:51 -0400
(Amps reflector only) There are many alloys of SS with some far more malleable than others. However, not too long ago there was a thread on here that IIRC resulted in the conclusion that these materi
/archives//html/Amps/2009-08/msg00393.html (6,756 bytes)

315. Re: [Amps] Design VS parasitic (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 24 Aug 2009 01:49:18 -0400
Wouldn't it be correct to say (paraphrasing): Designing a circuit to prevent parasitic oscillations rather than designing one to deal with the results of one? 73 Roger (K8RI) ________________________
/archives//html/Amps/2009-08/msg00429.html (8,738 bytes)

316. Re: [Amps] Design VS parasitic (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 24 Aug 2009 18:13:51 -0400
Reduce the tube gain in the parasitic range to prevent the oscillation? At least that's what I've been reading on here. <:-)) 73 Roger (K8RI) _______________________________________________ Amps mail
/archives//html/Amps/2009-08/msg00467.html (10,083 bytes)

317. Re: [Amps] Unsubscription et all (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Mon, 24 Aug 2009 18:17:20 -0400
Don't worry, it's part of a cycle and this too shall pass...eventually. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c
/archives//html/Amps/2009-08/msg00468.html (7,794 bytes)

318. Re: [Amps] Running iron in oil (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 27 Aug 2009 18:17:37 -0400
Using a vacuum instead of pressure is a much better way to make sure those voids are filled. Pressure compresses the air, which then expands back when the pressure is released. 73 Roger (K8RI) ______
/archives//html/Amps/2009-08/msg00557.html (10,075 bytes)

319. Re: [Amps] Running iron in oil (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 27 Aug 2009 19:46:46 -0400
Put a big honkin diode in series with the secondary if you really want to warm up the core<:-)) 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com h
/archives//html/Amps/2009-08/msg00562.html (13,184 bytes)

320. Re: [Amps] Not the Diacrode (score: 1)
Author: Roger <sub1@rogerhalstead.com>
Date: Thu, 27 Aug 2009 22:09:19 -0400
Hmmm..filament 20 volts at 1100 amps...I need a larger filament transformer and a room to put it in. <:-))OTOH I guess I'll have to pass as the I doubt the single phase 220 coming in would be up to i
/archives//html/Amps/2009-08/msg00565.html (8,755 bytes)

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