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161. Re: [Amps] 'good engineering' (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Sat, 27 Mar 2010 09:24:37 -0400
Children, children! - Jim W4ENE _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-03/msg00685.html (8,111 bytes)

162. Re: [Amps] Series screen gate design help (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Wed, 14 Apr 2010 14:38:23 -0400
Vic: The slightest little arc in the tube, the tiniest little gassy discharge kind of event, would instantly destroy a series pass transistor. Instantly. I would think a shunt device (with a series b
/archives//html/Amps/2010-04/msg00455.html (7,354 bytes)

163. Re: [Amps] Alpha 78 Multimeter (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Sun, 2 May 2010 20:57:29 -0400
If you can get a movement with the right sensitivity that fits in the holes, then don't worry about the scale. Just use freebie 'MeterBasic' (better yet 'Meter') to re-do the scale: http://tonnesoftw
/archives//html/Amps/2010-05/msg00017.html (7,496 bytes)

164. Re: [Amps] Heathkit Copyright (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Wed, 19 May 2010 15:15:12 -0400
And here all along I thought "copyright" meant it was alright to copy it. - Jim W4ENE _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co
/archives//html/Amps/2010-05/msg00205.html (7,256 bytes)

165. Re: [Amps] Plate load impedence (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Sat, 3 Jul 2010 22:01:22 -0400
Barrie: - JimT W4ENE _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2010-07/msg00050.html (6,864 bytes)

166. Re: [Amps] RJ1A relays question (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Tue, 27 Jul 2010 12:26:11 -0400
Andy: Might that be a "26 VAC" coil and you are applying DC? - Jim W4ENE _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
/archives//html/Amps/2010-07/msg00252.html (8,679 bytes)

167. Re: [Amps] More parasitic choke questions (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Thu, 29 Jul 2010 12:13:01 -0400
I have been "lurking" on this parasitic suppressor thing but now just have to say something. I want to point out that a good rule of thumb for inductance of a piece of wire is 15 (fifteen) nH per inc
/archives//html/Amps/2010-07/msg00313.html (8,650 bytes)

168. Re: [Amps] More parasitic choke questions (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Thu, 29 Jul 2010 18:44:53 -0400
Bill: I have a feeling that people are just "putting in stuff" with neither a clue as to why they are doing it nor what they are trying to accomplish. Sad to say, this may very well apply to "commerc
/archives//html/Amps/2010-07/msg00325.html (9,045 bytes)

169. Re: [Amps] Fw: Needed, quality watt meter (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Wed, 11 Aug 2010 17:06:27 -0400
Regarding using a "digital" display for making adjustments, Jim has just pointed out an interesting thing. The BEST displya for adjusting stuff is the kind of display (meter) with a moving pointer.
/archives//html/Amps/2010-08/msg00158.html (8,117 bytes)

170. Re: [Amps] Fw: Needed, quality watt meter (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Thu, 12 Aug 2010 11:05:52 -0400
Regarding the digital display versus a moving-pointer analog display, imagine the difficulty of "riding gain" on a digital display instead of a vu meter. No manufacturer I know of uses a digital (tha
/archives//html/Amps/2010-08/msg00180.html (7,762 bytes)

171. Re: [Amps] Why no images allowed? (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Fri, 13 Aug 2010 14:10:23 -0400
Bill: In lieu of a moderator response, I am sure it is a server storage space issue. This list is not alone in this regard. I certainly agree! - Jim W4ENE ____________________________________________
/archives//html/Amps/2010-08/msg00189.html (7,528 bytes)

172. Re: [Amps] Nice freebie (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Tue, 17 Aug 2010 16:42:10 -0400
Bill: Your note about the calculator came in the nick of time. I was about to go get a new teeny battery for mine but this came along. The thing does all of the things I want to do (including that ma
/archives//html/Amps/2010-08/msg00279.html (6,787 bytes)

173. Re: [Amps] Nice freebie (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Wed, 18 Aug 2010 09:43:35 -0400
I am under the impression that one of RPN's claim to fame is to be able to easily handle nested parentheses. Woopie. - Jim W4ENE _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2010-08/msg00290.html (8,083 bytes)

174. Re: [Amps] Why do tubes cost so much? (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Sun, 29 Aug 2010 21:40:57 -0400
I think that Bill and Fred have summarized things nicely. But I also suspect that the "tiny" tubes like a 6BA6 are assembled in a relatively (if not entirely) automated operation. And I chose the 6BA
/archives//html/Amps/2010-08/msg00448.html (9,747 bytes)

175. Re: [Amps] Which LDG Autotuner for Amp Input? (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Sat, 9 Oct 2010 12:09:41 -0400
That amplifier is presented in the 2006 ARRL Handbook on page 18.29 (as well as the front cover). The schematic is on page 18.30 and the parts list on 18.31. That parts list shows "LDGTuner" as "Mod
/archives//html/Amps/2010-10/msg00146.html (7,505 bytes)

176. Re: [Amps] W3NQN bandpass filters, question. (score: 1)
Author: "Jim Tonne" <Tonne@Comcast.Net>
Date: Sun, 28 Nov 2010 08:25:50 -0500
Martin: My browser butchered the schematic, as we all expected it would! Could you sketch it on paper and photograph or scan it? I am working with others on this general subject and am VERY intereste
/archives//html/Amps/2010-11/msg00527.html (7,137 bytes)

177. Re: [Amps] Derating loads (score: 1)
Author: "Jim Tonne" <Tonne@Comcast.Net>
Date: Thu, 9 Dec 2010 19:09:10 -0500
What happens with water-cooled loads is that when the temperature rises to the boiling point of the water, bubbles appear on the surface of the load material. These prevent the heat from being taken
/archives//html/Amps/2010-12/msg00084.html (7,635 bytes)

178. Re: [Amps] Fan for SB220 (score: 1)
Author: "Jim Tonne" <Tonne@Comcast.Net>
Date: Fri, 17 Dec 2010 12:57:01 -0500
Bill: I think Don was mostly wondering about heat. I had a Collins 20V2 broadcast rig that had a pair of 4-400s that "talked to each other" in terms of heat. The two tubes weren't all that far apart
/archives//html/Amps/2010-12/msg00190.html (8,251 bytes)

179. Re: [Amps] variable capacitors (score: 1)
Author: "Jim Tonne" <Tonne@Comcast.Net>
Date: Tue, 25 Jan 2011 16:21:34 -0500
Made my day too ! I have to learn about AMswap or Ebay or somesuch to get rid of the huge amount of "treasures" I have. - Jim W4ENE _______________________________________________ Amps mailing list A
/archives//html/Amps/2011-01/msg00281.html (8,607 bytes)

180. Re: [Amps] Alpha 78 Labels/upgrades (score: 1)
Author: "Jim Tonne" <Tonne@Comcast.Net>
Date: Thu, 24 Feb 2011 17:30:36 -0500
Mark: Could you use some kind of solvent to remove the ink from the original scale? Then put the new one on top of the old. I have the same situation with an old Johnson Ranger. Haven't figured out h
/archives//html/Amps/2011-02/msg00179.html (7,528 bytes)

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