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81. Re: [Amps] Item # 170692212503 (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Thu, 8 Sep 2011 10:01:09 -0400; These are two totally different amps. The one with the 4cx1500b is new and is basically the Eimac type 4cx1000 with more dissipation. The older 4cx1600 is a Svetlana type (Russian) tube. No interchan; /archives//html/Amps/2011-09/msg00015.html (9,606 bytes)
82. Re: [Amps] 2 ways of Gettering... (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Wed, 14 Sep 2011 10:20:21 -0400; I think the "always-on" nature of broadcast tubes helps the seals remain tight and inhibits in-gassing. Low voltage tubes are not as sensitive to the gas because the arc potential is much lower with; /archives//html/Amps/2011-09/msg00090.html (9,400 bytes)
83. Re: [Amps] Alpha 78 won't turn off (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Thu, 22 Sep 2011 16:31:08 -0400; This may not be one of them, but some amps and relay/LC based tuners "Exercise" their relays from time to time, even when turned of. It tends to make the not so often used ones stay motive and contac; /archives//html/Amps/2011-09/msg00153.html (11,822 bytes)
84. Re: [Amps] Big tubes (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Tue, 11 Oct 2011 08:24:50 -0400; I wonder if anyone has had any luck convincing any of these places to take on a small 3cv1500a7? I suspect with some advance planning, an organized group could provide a bulk order and pay pretty wel; /archives//html/Amps/2011-10/msg00028.html (8,051 bytes)
85. [Amps] 3CX1200Z7 CONVERSION, HENRY 5K? (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Tue, 15 Nov 2011 11:41:43 -0500; Anybody done a conversion to the z7 tube on a Henry? Understand mechanical part but wonder about the interelectrode differences. I do know filament Xfmr will need to be changed too. Sam, N9FUT ______; /archives//html/Amps/2011-11/msg00067.html (6,673 bytes)
86. Re: [Amps] HIGHWAY LOUIE (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Mon, 21 Nov 2011 16:33:57 -0500; I lived in AZ and had a mobile SS Henry amp that put out well over a K at 40 meters. Had corona issues and lots of antenna fires with the super resonator hustler. To his credit and Hustlers, N7DD's s; /archives//html/Amps/2011-11/msg00098.html (9,766 bytes)
87. Re: [Amps] HIGHWAY LOUIE (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Tue, 22 Nov 2011 14:10:40 -0500; I recently got a picture from a ham in AZ who had one folded kind of like a 3/4 of a rectangle. He is in the lowband antenna business. Looked like a big magnetic loop up over and back down on a van.; /archives//html/Amps/2011-11/msg00111.html (12,864 bytes)
88. Re: [Amps] amp supply lk500 za (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Mon, 20 Feb 2012 08:46:11 -0500; I had one of these early in production. I ran it very very hard on 20 and 75m. As I remember, it had 4 fans with the lower tier below chassis floor to cool pins and socket underneath. I always ran fa; /archives//html/Amps/2012-02/msg00227.html (11,074 bytes)
89. Re: [Amps] warbleing gi-7 (score: 1): Author: "Sam Carpenter" <Sam@OwensCommunication.com>; Date: Tue, 21 Feb 2012 11:45:39 -0500; Agreed, I think he should look at the shielding on the audio inputs or any other input on his xcvr and also the station earth ground. It will need to be low impedance with short as possible run of si; /archives//html/Amps/2012-02/msg00238.html (10,044 bytes)
90. Re: [Amps] WTB: E.F. Johnson socket #124-311-100 RF PARTS?? (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Tue, 3 Apr 2012 10:18:11 -0400; Did you try RF Parts? --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On Behalf Of Mike & Becca Krzystyniak Sent: Tuesday, April 03, 2012 9:32 AM To: amps@; /archives//html/Amps/2012-04/msg00017.html (8,033 bytes)
91. Re: [Amps] Tubes vs. Solid State (was) Expert Amps2K-FA:AnyOpinions? (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Tue, 1 May 2012 11:17:13 -0400; Aren't Vapor Cool and Water Cooling vastly different in efficiency with Vapor Cooling being much, much better. I think I remember that the Vapor Cooling thing goes to hell really fast if you allow a; /archives//html/Amps/2012-05/msg00005.html (11,694 bytes)
92. [Amps] New Heat Transport Links, Interesting (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Tue, 1 May 2012 11:33:23 -0400; Here are a couple of links to what they say will change everything in Heat Transport that will apply to solid state devices. http://www.nat <http://www.nature.com/nmat/journal/vaop/ncurrent/full/nmat; /archives//html/Amps/2012-05/msg00008.html (7,597 bytes)
93. [Amps] Corrected Second Linck (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Tue, 1 May 2012 11:35:45 -0400; http://nanotechnologytoday.blogspot.com/2012/04/effects-of-chemical-bondingon-heat.html _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c; /archives//html/Amps/2012-05/msg00009.html (6,484 bytes)
94. Re: [Amps] every db lost re Tubes vs. Solid State (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Tue, 1 May 2012 16:50:49 -0400; I wish they were all N or HN or DIN Connectors. I have seen some pl259, and even N connectors do ugly things under load, admittedly more at higher frequencies. Commercially we are using DIN Connector; /archives//html/Amps/2012-05/msg00030.html (13,642 bytes)
95. Re: [Amps] Need Cushcraft 40M yagi modeling files (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Wed, 30 May 2012 08:21:42 -0400; I think over on Array Solutions site as it relates to Cal-AV antennas there is an article modeling most of the different 40 meter beams. I think Jay wrote it and he may have all of the files. You may; /archives//html/Amps/2012-05/msg00349.html (8,291 bytes)
96. Re: [Amps] Tube Theory? (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Thu, 21 Jun 2012 13:59:54 -0400; This should keep you going for a long long time: http://www.pmillett.com/tubebooks/technical_books_online.htm Hello, Anybody know a good book to get on tube theory? I'd just like the basics on how to; /archives//html/Amps/2012-06/msg00349.html (9,284 bytes)
97. Re: [Amps] How lossy is Nylon at 50 MHz? (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Mon, 9 Jul 2012 10:48:39 -0400; I have started fires with almost every end insulator but glass at one time or another. That having been said, I was using them at the voltage point. I am sure as a center insulator with a current fee; /archives//html/Amps/2012-07/msg00140.html (9,893 bytes)
98. [Amps] Multi-Amp w/ Power Combiners (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Thu, 23 Aug 2012 08:16:48 -0400; I have often thought of why I do not see the running of multiple HF Tube amps with power combining networks. It would seem that the overall cost of using more than one smaller amplifier would be a ne; /archives//html/Amps/2012-08/msg00357.html (7,742 bytes)
99. Re: [Amps] Multi-Amp w/ Power Combiners (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 24 Aug 2012 12:47:59 -0400; I would think they could be tuned with both connected and into a starting 50 ohm load one at a time if the combiner matching were correct. Once into the final load, you should be able to touch them u; /archives//html/Amps/2012-08/msg00385.html (12,239 bytes)
100. Re: [Amps] Multi-Amp w/ Power Combiners (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 24 Aug 2012 12:53:08 -0400; A pair of unmodified 30s-1s would produce a nice ouput while resting. Should be plenty clean too! --Original Message-- Seen it done on 75 Meters with a pair of 30S-1s. Don W4DNR wavelength). ________; /archives//html/Amps/2012-08/msg00386.html (9,963 bytes)

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