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21. Re: [Amps] Transformer 50/60hz (score: 1): Author: vk3pa@vk3pa.com; Date: Fri, 23 Apr 2010 17:45:17 -0500; Quoting Carl <km1h@jeremy.mv.com>: 60hz t/former has less iron in the core causing saturation . on some of the yaesu t/f for 60hz when run on 50hz they burn out after a couple of years.. its ok to ru; /archives//html/Amps/2010-04/msg00628.html (9,536 bytes)
22. Re: [Amps] 1N5408 vs 1N5553 (score: 1): Author: vk3pa@vk3pa.com; Date: Tue, 8 Jun 2010 16:40:58 -0500; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-06/msg00090.html (9,477 bytes)
23. [Amps] Wot do u use when cleaning amp chassis (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Sun, 10 Oct 2010 17:41:21 -0800; Just starting to mod a MLA2500 AMP For a GS35b tube es chassis is full of grim, band s/w also grottie. Will any of the sprays be of any use? Eg WD40 wot ever! ________________________________________; /archives//html/Amps/2010-10/msg00168.html (6,522 bytes)
24. [Amps] GS35b es 4CX1000A INPUT (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Tue, 19 Oct 2010 19:08:22 -0800; Hi all 2 Q's. wot is the input impedance of a GS35b GNDED GRID, es also input impedance of a PAIR of 4CX1000 GRID DRIVEN I am putting tuned input into both amps..GS35b = 50 ohms? 2 x 4CX1000 =25 ohms; /archives//html/Amps/2010-10/msg00314.html (7,098 bytes)
25. [Amps] GS35b (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Fri, 12 Nov 2010 19:54:24 -0800; Wot value should the bias be set at for when ht is 3kv.. 1 CW 2 SSB.. TU 73 es Dxis vk3pa _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting; /archives//html/Amps/2010-11/msg00190.html (6,198 bytes)
26. [Amps] Toshiba tube 7f41R (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Sun, 14 Nov 2010 12:57:43 -0800; Pse any spec's on 7F41R Tube coaxal type base posable tetrode abt 4 inches dia es 8.5 inches overall length. Has a pair of handles on top hi Tu 73 es Dxis vk3pa ______________________________________; /archives//html/Amps/2010-11/msg00220.html (6,578 bytes)
27. [Amps] GS35b teflon chimney (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Fri, 26 Nov 2010 21:47:34 -0800; Who makes /sell teflon chimney's for GS35b tubes. I need one to be 2 inches high, tube is mounted 1 inch below chassie..or is there another type around? Need to be gud for contest work ,48 hours key; /archives//html/Amps/2010-11/msg00505.html (6,434 bytes)
28. Re: [Amps] Harbach Step Start Board (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Fri, 17 Dec 2010 08:30:43 -0800; 81.5mm l..40mm w..abt 20mm h .. _____ Does anyone have one of the Harbach step start boards handy and can give me the dimensions? Thanks! 73 Jim W7RY _______________________________________________ A; /archives//html/Amps/2010-12/msg00188.html (7,768 bytes)
29. [Amps] TERMINATING Coax relay (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Sat, 18 Dec 2010 18:04:01 -0800; When using a dual coax relay is it better to terminate the unused port into a short or into a 50 ohm load?? I am using a dual 4 port coax relay to feed 2 radios into a common amp, so should I termina; /archives//html/Amps/2010-12/msg00218.html (7,134 bytes)
30. [Amps] Dayton (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Sat, 08 Jan 2011 14:00:29 -0800; Hi is there a amp dinner at Dayton 2001 Also which hotels arê the ones to book into.. Y friend vk3gom s wanting all the info of where to stay hotel wise.. He will be travelling on his own.. In early; /archives//html/Amps/2011-01/msg00094.html (6,514 bytes)
31. [Amps] constant voltage heater transformers (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Fri, 03 Jun 2011 16:13:29 -0800; hi, I use a "constant voltage heater transformer" from a "Harris" 2x 4CX1000A Amp es seems to do a good job for wot it was designed! It was designed to be used with a given heater lead length/gauge ,; /archives//html/Amps/2011-06/msg00034.html (9,031 bytes)
32. [Amps] 4/1000A Ques. (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Fri, 24 Jun 2011 23:57:18 -0800; Wot screen voltage should I run with 5Kv on the plate in class "C" for a "CW" only amp, also wot bias voltage on the control grid ? Tube is grid driven. Any idea wot drive power to drive the tube to; /archives//html/Amps/2011-06/msg00289.html (6,948 bytes)
33. [Amps] 4/1000a (score: 1): Author: "Allan Greening" <vk3pa@vk3pa.com>; Date: Mon, 04 Jul 2011 14:17:47 -0800; When running a 4/1000a in class "C" -200volts,(CW AMP ONLY HI) wot cut of BIAS VOLTAGE should I use? When in rx mode.. Norm when in AB2 -75VOLTS WE USE -180 FER CUT OFF!!. Or where do I use "EBS" in; /archives//html/Amps/2011-07/msg00033.html (6,770 bytes)
34. [Amps] bird meters (score: 1): Author: vk3pa@vk3pa.com; Date: Tue, 06 Sep 2011 23:25:51 -0400; I have a couple of BIRD 100ua meters 2150-090 es 091 if I use these on my thruline 4522-002-8 50 ohm with 43 slugs wot error will I see?? as these slugs are for 30ua..meters!! or can I recal the slug; /archives//html/Amps/2011-09/msg00010.html (6,277 bytes)
35. Re: [Amps] bird meters (score: 1): Author: vk3pa@vk3pa.com; Date: Thu, 08 Sep 2011 18:00:16 -0500; tu all, easy way out is to get a couple of 30ua after market meters at 35 us each es put the 100ua back in the draw fer another day hi _______________________________________________ Amps mailing lis; /archives//html/Amps/2011-09/msg00024.html (8,197 bytes)
36. [Amps] Bleed resistor's fer hv supply (score: 1): Author: vk3pa@vk3pa.com; Date: Sun, 25 Sep 2011 16:58:49 -0400; Q1... Wot bleed resistor current should I aim fer with 7Kv with 20mf of cap ? that would be max DC voltage, but is Vari controlled es normal voltage would be abt 5500VDC.. Amp is class C ..control gr; /archives//html/Amps/2011-09/msg00210.html (7,273 bytes)
37. Re: [Amps] Warm up and on time question... PWM ramping (score: 1): Author: vk3pa@vk3pa.com; Date: Sun, 18 Dec 2011 15:49:46 -0600; http://www.pc5m.net/projects/filament-inrush-protection also Emtron uses a simular system _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting; /archives//html/Amps/2011-12/msg00144.html (9,496 bytes)
38. Re: [Amps] Dans amp band switch (score: 1): Author: vk3pa@vk3pa.com; Date: Tue, 27 Dec 2011 19:28:56 -0600; look at photo #44 u can c switch above load cap.going by front panel layout the band sw is on top of load cap top r/h corner look at front panel from the front of de amp. look like a fairly heavy but; /archives//html/Amps/2011-12/msg00237.html (8,861 bytes)
39. Re: [Amps] Dans amp band switch (score: 1): Author: vk3pa@vk3pa.com; Date: Tue, 27 Dec 2011 19:28:50 -0600; look at photo #44 u can c switch above load cap.going by front panel layout the band sw is on top of load cap top r/h corner look at front panel from the front of de amp. look like a fairly heavy but; /archives//html/Amps/2011-12/msg00238.html (8,875 bytes)
40. [Amps] HV STICK DIODES (score: 1): Author: vk3pa@vk3pa.com; Date: Tue, 27 Dec 2011 21:34:50 -0600; HAVE 4 "SILEC D40HL" DIODES 220mm long x 25mm wide es 12mm thick.. Any one know wot is their rating is, V es AMPS ? _______________________________________________ Amps mailing list Amps@contesting.c; /archives//html/Amps/2011-12/msg00239.html (6,606 bytes)

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