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41. Re: [Amps] sb220 zener diode problems (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Fri, 08 Jul 2005 17:16:01 -0500; Ian, On receive, the cathode will have +120 Vdc applied to the cathodes through the C.T. of the heater transformer. On transmit, the C.T. of the heater transformer is connected to the 5.1 Vdc zener f; /archives//html/Amps/2005-07/msg00067.html (12,741 bytes)
42. Re: [Amps] filament transformer (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Sat, 09 Jul 2005 00:22:56 -0500; David, That's the reason for me always using the wattage in equals wattage out scenario. The current varies with the load and should have a constant voltage after the sag due to the transformer regul; /archives//html/Amps/2005-07/msg00071.html (12,892 bytes)
43. [Amps] Big Hopes and Pipe Dreams (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Sat, 09 Jul 2005 01:00:23 -0500; I seen this wattmeter on eBay and had to show it over the price. Take a look at the meters needle plus the power capability. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=48701&item=57880477; /archives//html/Amps/2005-07/msg00072.html (6,785 bytes)
44. [Amps] HP 5328A (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Mon, 11 Jul 2005 08:22:14 -0500; I'm wondering what a HP 5328A frequency counter with the following options is worth. The ones on eBay only go to 550 MHz I've seen and most dont have the voltmeter. There is an option too I'm wonderi; /archives//html/Amps/2005-07/msg00082.html (7,824 bytes)
45. [Amps] Russian parts help (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 13 Jul 2005 18:51:28 -0500; All, I was looking at an amp designed by David Devdariani 4L1DA and cant not cross the zener diodes and transistors. Can any on here lend some help in giving the values of each? I tried to cross thes; /archives//html/Amps/2005-07/msg00151.html (6,859 bytes)
46. [Amps] HP5328A Counter (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Sat, 16 Jul 2005 17:10:48 -0500; All, I received the HP 5328A counter today with the 1.3 GHz option and voltmeter option. The pics didn't do it justice as it looks almost new except for the stain on top left by glue from a tag or la; /archives//html/Amps/2005-07/msg00184.html (7,128 bytes)
47. Re: [Amps] HP5328A Counter (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Sat, 16 Jul 2005 22:07:33 -0500; Bill, This one has it too (oven oscillator, option 010) but I forgot to mention it. That gives 5 X 10^-9 of final value on 20 minutes of warmup and an aging rate of the same per day after 24 hours. T; /archives//html/Amps/2005-07/msg00185.html (9,422 bytes)
48. Re: [Amps] HP / Agilent manuals (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Sun, 17 Jul 2005 16:35:20 -0500; David, It will not open right in Windows either. However like you said, it's readable. I tried to open it in my HTML editor to clean it up and it crashed the machine. There's something odd about it's; /archives//html/Amps/2005-07/msg00195.html (9,764 bytes)
49. Re: [Amps] LK500 Amp Problem (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Tue, 19 Jul 2005 04:13:16 -0500; Adrian, You want to make sure you hold the magnet wire taught when rewinding it. Then the end connections will hold it pretty much in place. Afterwards, get a spray can of polyurathane varnish and sp; /archives//html/Amps/2005-07/msg00209.html (7,695 bytes)
50. [Amps] GU-84B Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Tue, 19 Jul 2005 14:53:19 -0500; On a webpage somewhere, I cant remember now where, I read about the GU-84B (4CX1600) having an undersized radiator. I think it was on a Russian amateur website. What I had read was this tube was actu; /archives//html/Amps/2005-07/msg00215.html (7,499 bytes)
51. Re: [Amps] GU-84B Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 03:12:04 -0500; Dick, I'm not saying it's a bad tube, and dont want none to think that. I just dont want anyone to undercool the tube so it will last. Who knows, the 4CX1500 may have an over-sized radiator too! Abou; /archives//html/Amps/2005-07/msg00219.html (10,970 bytes)
52. Re: [Amps] GU-84B Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 07:00:11 -0500; Yup, I'd imagine it would work too if it will pinpoint the anode surface as I'm not sure what the minimum distance is and the spot size is it measures. The reason being is I figure the anode body wou; /archives//html/Amps/2005-07/msg00225.html (14,402 bytes)
53. Re: [Amps] GU-84B Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 07:33:04 -0500; Gerald, Yea, as long as it runs within the ratings, it'd be ok. That makes one wonder if Eimac might have made an over-kill on the radiator of the 4CX1500. I'd have to see what Eimacs temp specs are; /archives//html/Amps/2005-07/msg00227.html (11,252 bytes)
54. Re: [Amps] GU-84b Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 07:51:08 -0500; Tom, Doing a Google search, I found several pages refering to the GU-84B as a GU84B/4CX1600 just then, and then also seen some refering to it as a 4CX2500. The very first hits I list below; http://ww; /archives//html/Amps/2005-07/msg00228.html (45,312 bytes)
55. Re: [Amps] GU-84B Cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 09:25:16 -0500; Dick, Thanks for letting me know. Evidentally, some on the net are confused about the tube numbers as per the Google searches I done. When doing one for a GU-84B, the very first listing was saying GU; /archives//html/Amps/2005-07/msg00231.html (15,880 bytes)
56. [Amps] GU-84B cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 09:52:45 -0500; All, I went by cqham.ru and looked around for the articla about the GU-84B but couldn't find it. That's where I thought I might have seen it but evidently wasn't. I was at several other sites that da; /archives//html/Amps/2005-07/msg00234.html (8,383 bytes)
57. [Amps] GU-84B cooling (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Wed, 20 Jul 2005 09:53:35 -0500; All, I went by cqham.ru and looked around for the articla about the GU-84B but couldn't find it. That's where I thought I might have seen it but evidently wasn't. I was at several other sites that da; /archives//html/Amps/2005-07/msg00235.html (8,080 bytes)
58. Re: [Amps] Source for 8877 amp input tuning coil needed (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Thu, 21 Jul 2005 21:48:21 -0500; Joe, Precision Paper Tube Co. made a lot of those adjustable forms that most used for variable inductors. You could get these either PC board mount or chassis mount. The chassis mount goes in a round; /archives//html/Amps/2005-07/msg00245.html (8,852 bytes)
59. [Amps] Mobile amps (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Thu, 21 Jul 2005 21:57:37 -0500; All, Some have been buying those 11 meter mobile amps and converting them over for amateur use. The ones which use un-etched PC boards, etc. The RF keying in these are generally rats nests and pretty; /archives//html/Amps/2005-07/msg00246.html (7,438 bytes)
60. Re: [Amps] 8877 tuning coil addition (score: 1): Author: "Will Matney" <craxd@engineer.com>; Date: Thu, 21 Jul 2005 22:12:32 -0500; I forgot this part, A white toroid might work. The color white means its a powdered iron and not ferrite. The only problem with a toroid is it's not tunable. Though you might add or subtract a turn t; /archives//html/Amps/2005-07/msg00247.html (9,880 bytes)

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