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41. [Amps] GS35B Plate connection suggestions wanted (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sat, 05 Feb 2005 05:14:43 +0000; There are quite a few sites out there showing GS35B based amps in various stages of construction but I have yet to see a really solid picture of the completed tank to plate arrangement for a HF amp u; /archives//html/Amps/2005-02/msg00134.html (6,624 bytes)
42. [Amps] Help in getting a plate transformer (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 06 Feb 2005 01:53:57 +0000; All, I need a transformer suitable for making a 3kV 1A power supply for a linear amplifier project. A Gates or Dahl BC1H transformer or similar with 240V input windings is the approximate target. Let; /archives//html/Amps/2005-02/msg00168.html (6,658 bytes)
43. Re: [Amps] Quick 220 outlet? (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Mon, 07 Feb 2005 23:45:14 +0000; My father-in-law (SK)showed me how to do this when I was dating his daughter. Worked for him, kicked the hell out of my arm... Hmmmm. gdaught6@stanford.edu wrote: On 7 Feb 2005 at 14:58, K7RDX wrote:; /archives//html/Amps/2005-02/msg00267.html (8,937 bytes)
44. Re: [Amps] 220 & 10dB (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Wed, 09 Feb 2005 03:34:37 +0000; Joe "Harold B. Mandel" <ka1xo@juno.com> wrote: You may end up dead. -- Do you Yahoo!? Yahoo! Mail - Easier than ever with enhanced search. Learn more. _______________________________________________; /archives//html/Amps/2005-02/msg00327.html (8,889 bytes)
45. Re: [Amps] 165V primary transformers. (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 13 Feb 2005 00:37:32 +0000; The US standards are 208 ph to ph and 120 ph to N for industrial. Residential is 240 ph to ph and 120 ph to ct neutral on a delta connected transformer secondary. 165 does not appear anywhere in the; /archives//html/Amps/2005-02/msg00449.html (7,887 bytes)
46. [Amps] Dual GS35b input impedance (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 13 Feb 2005 23:22:37 +0000; I am now at the stage of designing my tuned input for the dual GS35b amp that is in process here. There seems to be a general concensus that the tube presents a 50 Ohm impedance when cathode driven i; /archives//html/Amps/2005-02/msg00461.html (7,095 bytes)
47. Re: [Amps] Dual GS35b input impedance (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 13 Feb 2005 23:31:43 +0000; Made my own grid clamping fixture from W4ZT's directions. The anode and filament connections have yet to be designed. Alek Petkovic wrote: What are you using for sockets Tomm? 73, Alek. VK6APK At 07:; /archives//html/Amps/2005-02/msg00463.html (8,035 bytes)
48. Re: [Amps] Dual GS35b input impedance (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Mon, 14 Feb 2005 04:56:55 +0000; Was planning on 3000VDC. Thanks for the advice. jeff millar wrote: I've seen a variety of values for GS-35 input impedance over the range 25 to 100 Ohms. It varies between tubes because the grid bias; /archives//html/Amps/2005-02/msg00470.html (8,612 bytes)
49. Re: [Amps] Degreasing Ceramic (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Tue, 15 Feb 2005 03:49:03 +0000; Trichlor (short for trichloroethylene) is also nasty s*it. It was used wholesale as a parts degreaser by the military and industry and then banned sometime in the 70's as a general use solvent. I had; /archives//html/Amps/2005-02/msg00517.html (10,562 bytes)
50. Re: [Amps] Pi-net formulas (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Thu, 17 Feb 2005 02:07:15 +0000; If you don't mind using the computer, ELSIE V2.01 by Jim Tonne is very good. I was able to optimize my input filter values in an evening for all 7 bands. _____________________________________________; /archives//html/Amps/2005-02/msg00555.html (7,253 bytes)
51. [Amps] Good source of parts available (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 20 Feb 2005 07:25:05 +0000; All, I came into a great source of AC input parts for amp building. A bunch of surplus MARWAY MPD 250 PDUs (power dist unit) usually used in racks of servers. Each unit contains a 10' line cord (SO s; /archives//html/Amps/2005-02/msg00609.html (6,595 bytes)
52. Re: [Amps] 3-1000Z Filament Voltage Question (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 20 Feb 2005 16:06:06 +0000; 'cept by then all broadcast stations will be in orbit... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-02/msg00620.html (12,113 bytes)
53. [Amps] Wanted, dual GS35b HF amps actual results (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Mon, 21 Feb 2005 19:05:26 +0000; All, Regards Tomm, KD7QAE _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-02/msg00652.html (7,106 bytes)
54. Re: [Amps] Shipping Security (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Fri, 25 Feb 2005 03:39:44 +0000; Hal, I just received teh transformer that you shipped to me via UPS. It arrived in excellent condition and the packing job was superb! Thanks much for the excellent experience. Tomm Aldridge KD7QAE O; /archives//html/Amps/2005-02/msg00794.html (10,501 bytes)
55. Re: [Amps] close to off topic - how to read antenna R + jX ?? (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sun, 27 Feb 2005 19:22:47 +0000; Of course you mean inductive reactance at 220MHz. There will be very little change in inductance with frequency unless there is a permeable material in or very near whose mu changes with frequency (f; /archives//html/Amps/2005-02/msg00908.html (15,355 bytes)
56. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Fri, 04 Mar 2005 16:23:37 +0000; Then why do all the GS35B designs have filament chokes? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-03/msg00051.html (8,777 bytes)
57. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Sat, 05 Mar 2005 17:45:45 +0000; As I understand this, I really should be adding a very high speed clamp to ground from each of my GS35B cathode connections in the form of a triggered device or a spark gap. Correct? What I don't und; /archives//html/Amps/2005-03/msg00113.html (15,931 bytes)
58. Re: [Amps] mobile amp (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Tue, 08 Mar 2005 06:06:36 +0000; Note they also have ferrite rods at the bottom of the referenced page. Good for filament chokes. Note also that I have refrained from making any vibrator jokes (hi hi). Tomm ha ______________________; /archives//html/Amps/2005-03/msg00207.html (8,911 bytes)
59. Re: [Amps] FW: RE: Liquid Cooling Systems (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Thu, 10 Mar 2005 20:11:01 +0000; My XYL, a research biologist, concurs but adds that DI may be more risky as the ION exchange process could end up leaving behind chemicals if it is not properly balanced. Water is water. I am a physi; /archives//html/Amps/2005-03/msg00268.html (9,939 bytes)
60. Re: [Amps] Liquid Cooling Systems (score: 1): Author: Tomm Aldridge <KD7QAE@ARRL.NET>; Date: Fri, 11 Mar 2005 06:03:52 +0000; Here is the reference for Red Line's Water Wetter product: http://www.racerpartswholesale.com/redtech3.htm _______________________________________________ Amps mailing list Amps@contesting.com http:/; /archives//html/Amps/2005-03/msg00279.html (7,867 bytes)

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