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61. [Amps] Filter correction (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 02 Aug 2004 14:38:45 -0400; The 500 V was meant to be 400, sorry for that! "So for 20 mA at 500 Volts, our bleeder resistor would be 400 / .02 = 20K ohms." Will Matney _______________________________________________ Amps mailin; /archives//html/Amps/2004-08/msg00015.html (6,697 bytes)
62. Re: [Amps] Resonant choke filter (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 02 Aug 2004 23:49:01 -0400; Rich, I'm running a regulator after the swinging choke for the bench supply. I was wanting to do this to try and clean up the ripple before the regulator had to handle it (plus I have a surplus swing; /archives//html/Amps/2004-08/msg00019.html (13,206 bytes)
63. Re: [Amps] Resonant choke filter (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 03 Aug 2004 19:55:13 -0400; Don, I read that about the lam stacking on an audio website and I thought I seen it on Hammonds website also. What it said was the chokes were being supplied interleaved like transformers. I know for; /archives//html/Amps/2004-08/msg00026.html (10,365 bytes)
64. [Amps] Chimneys (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 05 Aug 2004 19:10:41 -0400; I am working with a company now who makes different electrical tubings. They mentioned one with a heat rating of 400 deg. C. (752 deg F.). Also saying they could match the diameters I need. This tubi; /archives//html/Amps/2004-08/msg00042.html (6,982 bytes)
65. [Amps] Combiners and splitters (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Thu, 05 Aug 2004 20:31:03 -0400; Ok, I need some help. Most know I deal with tubes and to me are a piece of cake. I never did delve into the solid state stuff but was thinking about hybrid combiners, etc. that I seen used on an amp; /archives//html/Amps/2004-08/msg00043.html (7,907 bytes)
66. [Amps] CQHAM.RU (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Mon, 09 Aug 2004 09:32:15 -0400; A while back some was wanting some links for Russian tube amps. Below is a translated link for the website of CQHAM.RU. It has a whole slew of amp schematics using Russian tubes free to view for anyo; /archives//html/Amps/2004-08/msg00075.html (7,165 bytes)
67. Re: [Amps] CQHAM.RU (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 10 Aug 2004 08:43:21 -0400; Paul, I'm getting that right now also. Sometimes it's the connection between Babelfish and the website it's translating. The link is ok, just have to wait until the site will connect and or keep tryi; /archives//html/Amps/2004-08/msg00084.html (8,765 bytes)
68. [Amps] Another good Russian website (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 10 Aug 2004 18:01:10 -0400; I stumbled across this website from RUGA also for Russian ham gear. There is a large page on amplifiers and associated equipment. The link for them is the 2nd down on the left menu. If I run across m; /archives//html/Amps/2004-08/msg00088.html (6,723 bytes)
69. Re: [Amps] Another good Russian website (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 10 Aug 2004 20:21:45 -0400; I dont have pop ups on mine when viewing it. I think it's in the browser as I use Netscape (Mozilla) which has a built in pop up stopper. Netscape doesn't show that it's blocked any either. That link; /archives//html/Amps/2004-08/msg00092.html (9,613 bytes)
70. [Amps] 20kw Dummy load? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 15 Aug 2004 10:43:13 -0400; Robin, Lo and behold, God help me for telling this one. You might just try using saltwater in a tank for that load you need. I seen a dummy load built with two electrodes sticking in salt water. The; /archives//html/Amps/2004-08/msg00137.html (9,850 bytes)
71. [AMPS] Carborrundum Resistors (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 15 Aug 2004 10:49:22 -0400; Larry, Try adding a 30-33 pF doorknob cap to ground at the input of those resistors and see if it drops it. The old Collins dummy loads and some new ones uses this method to get rid of any inductance; /archives//html/Amps/2004-08/msg00139.html (7,428 bytes)
72. [Amps] Filtering capacitor in a HV PS: How low can you get (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 17 Aug 2004 06:37:10 -0400; Angel, About 20 to 25 uF is about a minimum used by all amp manufacturers on the B+ supply. Most circuits are at least sized X2 when considering the voltage. However, I've seen a bunch by manufacture; /archives//html/Amps/2004-08/msg00169.html (8,187 bytes)
73. [Amps] Need Diagnostic help (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 17 Aug 2004 07:22:36 -0400; Tom, Does the amp do this while at idle or only when it's keyed up? If it is when it's keyed, I'd take a look at my antenna and or the line. I have seen them arc inside the coax connector making a hi; /archives//html/Amps/2004-08/msg00171.html (7,501 bytes)
74. [Amps] Filtering capacitor in a HV PS: How low can you (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 17 Aug 2004 07:27:50 -0400; Angel, Correct but don't forget filtering the control grid voltage too. It can cause IMD just as bad if not worse than the screen especially in grid driven tetrodes. I am not sure about this. 4CX250B; /archives//html/Amps/2004-08/msg00172.html (6,766 bytes)
75. [Amps] RE: Need Help (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Tue, 17 Aug 2004 10:36:25 -0400; Tom, Ok this might narrow it down. If the squeal you hear changes tone when the step start kicks in, it's could be something in the HV side. If it does not, then that also takes us to the low voltage; /archives//html/Amps/2004-08/msg00176.html (8,172 bytes)
76. [Amps] Filtering capacitor in a HV PS (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 18 Aug 2004 10:15:26 -0400; Geo, Here's pretty much what I know on the subject going from the manufacturers point of view. Taking both sides from the component manufacturer and the OEM's. First, keep in mind that a choke input; /archives//html/Amps/2004-08/msg00193.html (8,793 bytes)
77. [Amps] Surplus electrolytic capacitors (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 18 Aug 2004 13:27:23 -0400; Below is a link to an article from Passive Component Industry magazine about bad electrolyte being used in some Taiwanese made electrolytic capacitors. From this, I would say that a bunch will be on; /archives//html/Amps/2004-08/msg00198.html (7,088 bytes)
78. [Amps] SAFETY WITH HIGH VOLTAGE (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sat, 21 Aug 2004 15:18:39 -0400; Hal, Something sounds fishy about the one resistor only measuring 53.2 ohms. I'm wondering if the factory has mis-labeled the resistor and you actually had a 50 ohm resistor. If so, this would have d; /archives//html/Amps/2004-08/msg00257.html (9,742 bytes)
79. [Amps] Looking for old catalog (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 22 Aug 2004 17:02:34 -0400; Gents, I'm looking for an old "Jeffers" choke catalog from back in the 70's. Also, I'm looking for an old "JH Miller" catalog form about the same era. I'm really needing the RF and plate choke info.; /archives//html/Amps/2004-08/msg00263.html (7,109 bytes)
80. [Amps] Centurion cooling improvement ideas for AM service (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Wed, 25 Aug 2004 10:36:17 -0400; Ed, Generally, the tube spec sheets have ratings for both ICAS and CCS, where CCS is what you want for this or close (100% AM Service). If the tube is ran CCS at the tube manufacturers ratings it sho; /archives//html/Amps/2004-08/msg00295.html (8,934 bytes)

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