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161. Re: [Amps] AL-800 (score: 1)
Author: R.Measures <r@somis.org>
Date: Wed, 26 Nov 2003 22:31:07 -0800
** Linearly, about 700w-pep. Non-linearly, c. 900w-pep. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2003-11/msg00381.html (7,078 bytes)

162. Re: [Amps] Re: SB200 Grid Current... (score: 1)
Author: R.Measures <r@somis.org>
Date: Wed, 26 Nov 2003 22:31:08 -0800
** Or by measuring Vg-fil with a high-potential tester. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2003-11/msg00382.html (10,710 bytes)

163. Re: [Amps] AL-1200 Questions (score: 1)
Author: R.Measures <r@somis.org>
Date: Thu, 27 Nov 2003 08:43:58 -0800
** Could be, however, strontium and barium oxides are definitely visable, and saw none other than on the cathode. ** Most of the gold meltballs I see are not lodged, they're loose and free to move a
/archives//html/Amps/2003-11/msg00384.html (10,240 bytes)

164. Re: [Amps] Henry 3K? (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 28 Nov 2003 07:42:06 -0800
** A 3K-A will deliver close to 2k out because it has c. 3800 anode-V, which also means it has above average power-gain, which can bring pecuniary pain. If used with a modern radio, the RF-switching
/archives//html/Amps/2003-11/msg00389.html (8,010 bytes)

165. [Amps] WTB: 2000pF, 3000-5000 V vacuum variable cap. (score: 1)
Author: R.Measures <r@somis.org>
Date: Sat, 29 Nov 2003 08:10:11 -0800
(Needed for 8171 load C). _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2003-11/msg00393.html (6,655 bytes)

166. Re: [Amps] How to improve efficiency (score: 1)
Author: R.Measures <r@somis.org>
Date: Sat, 29 Nov 2003 08:10:11 -0800
** Make sure the 80m tank operating Q is sufficient for the Z-transformation ratio at hand. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contest
/archives//html/Amps/2003-11/msg00394.html (7,165 bytes)

167. Re: [Amps] Life on the Screen? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sat, 29 Nov 2003 08:10:10 -0800
** If the screen is bypassed, there is no signal potential on the screen - and it can not be used for such. Unless a grid-driven 4cx5k or 4cx10k has their internal feedback-C neutralized, they will
/archives//html/Amps/2003-11/msg00395.html (8,458 bytes)

168. Re: [Amps] Life on the Screen? (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 30 Nov 2003 09:21:39 -0800
** true ** it might. However, tuning up for the specified screen -I will do the job. ** provided that there is minimal L in the 50-ohm termination. ** tnx for coupler, Marv. ________________________
/archives//html/Amps/2003-12/msg00000.html (8,262 bytes)

169. Re: [Amps] WTB: 2000pF, 3000-5000 V vacuum variable cap. (score: 1)
Author: R.Measures <r@somis.org>
Date: Sun, 30 Nov 2003 18:33:43 -0800
Your phone has been busy. 2000pF is enough but 3000 will work FB. Has it been high-potted recently? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2003-12/msg00001.html (7,923 bytes)

170. Re: [Amps] Looking for help with AL-811 repair (score: 1)
Author: R.Measures <r@somis.org>
Date: Mon, 1 Dec 2003 02:45:16 -0800
Are all of the filaments lit? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2003-12/msg00013.html (8,770 bytes)

171. Re: [Amps] Alpha 77 Filter Cap replacement? (score: 1)
Author: R.Measures <r@somis.org>
Date: Mon, 1 Dec 2003 02:45:16 -0800
** This a common problem, especially among contestors, where the high-ESR of the compact flash-type C that is used causes heat-buildup which stresses the solder seals and eventually breaks them. If I
/archives//html/Amps/2003-12/msg00014.html (9,074 bytes)

172. Re: [Amps] 220V service for amplifier (score: 1)
Author: R.Measures <r@somis.org>
Date: Wed, 3 Dec 2003 06:25:19 -0800
** For powering a single-phase amplifier with a capacitor-type HV filter, it is better to go with larger gauge wire than the electrical code specifies because I-peak is typically 10x I-average for c
/archives//html/Amps/2003-12/msg00043.html (11,763 bytes)

173. Re: [Amps] tubes in parallel (score: 1)
Author: R.Measures <r@somis.org>
Date: Wed, 3 Dec 2003 06:37:51 -0800
* No, but there could be a problem if only one suppressor is used for two tubes, or there could be a less serious problem if the two suppressors are allowed to couple to each other. It may not be OK
/archives//html/Amps/2003-12/msg00044.html (7,561 bytes)

174. Re: [Amps] 220V service for amplifier (score: 1)
Author: R.Measures <r@somis.org>
Date: Wed, 3 Dec 2003 19:38:13 -0800
** What if the same tragic occurrence that severs the neutral wire also severs the ground wire? It seems to me that to assure against this possibility, two ground and two neutral wires are needed to
/archives//html/Amps/2003-12/msg00045.html (15,741 bytes)

175. Re: [Amps] tubes in parallel (score: 1)
Author: R.Measures <r@somis.org>
Date: Thu, 4 Dec 2003 04:06:30 -0800
** The current handling ability of modern, high-temp silicone-varnish insulated Cu wire is surprising. For example, in single-layer solenoid RF choke service, #24 gauge will handle 4A of anode-I. Th
/archives//html/Amps/2003-12/msg00055.html (7,659 bytes)

176. Re: [Amps] 220V service for amplifier (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 5 Dec 2003 01:43:08 -0800
** amen ** Heath managed to use a 120Vac fan on the ancient SB-220 by connecting it across one of the dual 120v privaries on the HV transformer. ** One has a choice, unless one enjoys battling compu
/archives//html/Amps/2003-12/msg00066.html (10,437 bytes)

177. Re: [Amps] 220V service for amplifier (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 5 Dec 2003 01:43:07 -0800
** Ian -- The neutral wire between the electric-mains' box and my radio room is #6 gauge. At least in my experiences, severing #6 isn't even close to being easy - - and besides that, the drainage is
/archives//html/Amps/2003-12/msg00067.html (8,788 bytes)

178. RE: [Amps] 220V service for amplifier (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 5 Dec 2003 01:43:09 -0800
** I conducted a number of signal strength measurements on 40m using a balanced antenna, and no difference was observed on Tx (at the Rx end) or Rx at this end with or without the good RF ground. Al
/archives//html/Amps/2003-12/msg00068.html (15,590 bytes)

179. Re: [Amps] Re: Tubes in parallel (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 5 Dec 2003 01:43:12 -0800
** A typical parasitic suppressor's inductor has 0.0005-ohms to 0.03-ohms of DC resistance. The stock parasitic suppressors in a TL-922 will carry 50-amperes DC 24/7. Vaporizing parasitic suppressor
/archives//html/Amps/2003-12/msg00069.html (10,549 bytes)

180. Re: [Amps] Toroid Plate Transformers (score: 1)
Author: R.Measures <r@somis.org>
Date: Fri, 5 Dec 2003 01:43:13 -0800
** The HV transformers I purchase from Pete Dahl use toroidal cores. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo
/archives//html/Amps/2003-12/msg00070.html (7,816 bytes)

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