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321. [Amps] Power transformer (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 19 22:11:32 2003; Equal potential out of phase seriesed windings should produce full smoke/a virtual short.. - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2003-02/msg00387.html (7,756 bytes)
322. [Amps] 2sc2879 idle collector current (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 19 05:17:52 2003; The mfg of the radio said 200 for a pair. That was not clean enough, so I went with 200mA ea. cheers, Vic - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2003-02/msg00373.html (7,068 bytes)
323. [Amps] 3-500Z filament (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 19 05:11:25 2003; A better-than-original solder for resoldering 3-500Z pins is 6%-Ag/94%Sn (221?C) silver-solder. To use: 1. remove original Pb/Sn solder with "solder-wick". 2. apply liquid Rosin flux to inside of pin; /archives//html/Amps/2003-02/msg00372.html (7,728 bytes)
324. [Amps] Input circuit resonance in G-G Amps (score: 127): Author: 2 at vc.net (2); Date: Tue Feb 18 16:14:05 2003; Eric the Magnicicent: ^^ To measure the resonance of a 3-500Z grid, I used a dipmeter and grounded one grid pin with a Cu strap to make sure I was not measuring a pin-to-pin resonance. -- What was th; /archives//html/Amps/2003-02/msg00364.html (11,165 bytes)
325. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Tue Feb 18 10:47:41 2003; ** the amount of grid bypass C determines the 28MHz V-drop coupled (by the 5pF anode-grid C) to the grid's fusing resistor. 1800pF or so is enough to protect the resistor from getting toasted on 10m; /archives//html/Amps/2003-02/msg00357.html (8,548 bytes)
326. [Amps] 8877 Penta tube (score: 127): Author: 2 at vc.net (2); Date: Sun Feb 16 09:44:47 2003; Penta tubes are Chinese. Although early Chinese 8877s reportedly had some problems, improvements were made and currently produced 8877s are ok in every way. - R. L. Measures, a.k.a. Rich..., 805.386; /archives//html/Amps/2003-02/msg00335.html (7,136 bytes)
327. [Amps] 304TL (score: 127): Author: 2 at vc.net (2); Date: Sat Feb 15 10:22:37 2003; I have had similar experiences with gassy tubes. They never seem to getter themselves -- i. e., Get rid of internal gas. cheers, Firson. - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcn; /archives//html/Amps/2003-02/msg00331.html (7,264 bytes)
328. [Amps] Cheap 1500 Watt Amps? (score: 127): Author: 2 at vc.net (2); Date: Fri Feb 14 11:50:05 2003; ** the max speed limit is 1500W, +10%, so we get the benefit of the doubt. A semi-friend of mine (K6KZI) had a BTI which produced c. 1680w pep for the FCC, and he was not cited. For years, the FCC r; /archives//html/Amps/2003-02/msg00326.html (7,573 bytes)
329. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Fri Feb 14 11:49:53 2003; ** There is very little C between the anode and the cathode pins on the socket unless a Masonite? chassis is employed. ** The subject of human foibles can make for some fairly good laughs. ** As I u; /archives//html/Amps/2003-02/msg00325.html (12,644 bytes)
330. [Amps] Cheap 1500 Watt Amps? (score: 127): Author: 2 at vc.net (2); Date: Fri Feb 14 10:27:27 2003; ** In order for a linear amplifier to be able to do 1500w out key-down/A?/RTTY, 24/7, a CCS 2500w DC supply is needed. The only Ham amp I am aware of that has such a supply is the Henry 3K-A. I know; /archives//html/Amps/2003-02/msg00324.html (7,957 bytes)
331. [Amps] Voodoo Magnetic Fields (score: 127): Author: 2 at vc.net (2); Date: Thu Feb 13 14:52:02 2003; What evidence is there of cold gettering? - During the Grate Parasitics Debate with the amplifier "expert", it was claimed that "Big-Bangs" in g-g amplifiers were caused by a tube gas arc. I argued; /archives//html/Amps/2003-02/msg00315.html (9,025 bytes)
332. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Thu Feb 13 14:51:55 2003; Eric -- You need to quote back the lines which you are responding to. Fairure to do so on a discussion group is not considered to be very Magnificent. Correct. The spec sheets say full ratings to 110; /archives//html/Amps/2003-02/msg00314.html (9,536 bytes)
333. [Amps] Voodoo Magnetic Fields (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 20:26:44 2003; ** The tubes John Lyles works with have an ion pump. 3-500Zs do not. Also, you have not yet explained cold gettering. I have a 3-400Z that has exhibited c. 10uA of leakage @8kV for the last 7-years.; /archives//html/Amps/2003-02/msg00309.html (9,771 bytes)
334. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:58:35 2003; The combined effect of the grounded-grid to cathode C (9pF) and the combined L of the gid-cage, the grid-header, and the extenal pins (320nH). I have no idea what the Q is, but the sharp dip suggests; /archives//html/Amps/2003-02/msg00303.html (7,720 bytes)
335. Spam Alert: Re: [Amps] The Philosophy of Science (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:57:56 2003; The term "stonewalling" came about during President Nixon's Watergate scandal. In the heat the scandal, Nixon and his lap-dogs defended against certain questions as if the questions had been directe; /archives//html/Amps/2003-02/msg00302.html (17,177 bytes)
336. [Amps] Voodoo Magnetic Fields (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:49:50 2003; ** Not quite exactly, Eric. The 3-500Z filament is a double-helix that resembles DNA. The plural of helix is helices or helixes. The filament is made from one piece of 3% thorium/ 97% tungsten wire.; /archives//html/Amps/2003-02/msg00301.html (8,673 bytes)
337. [Amps] Voodoo Magnetic Fields (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:43:43 2003; Mr Charles Thomas Rauch, Jr., W8JI, is a recognized expert on gettering. So far, his information on gettering far exceeds Eimac's. - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcnet.com; /archives//html/Amps/2003-02/msg00300.html (8,159 bytes)
338. [Amps] Operations/precautions Manual for Club (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:40:19 2003; Without attributution, it is not easy to determine to whom your questions are directed, Eric. - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2003-02/msg00299.html (7,034 bytes)
339. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:19:50 2003; ** I have never measured grid resonance of a g-g 3 by 3, Ken. - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2003-02/msg00297.html (7,633 bytes)
340. [Amps] SB220 Improvements (score: 127): Author: 2 at vc.net (2); Date: Wed Feb 12 15:15:26 2003; ** Good point, Vic. Yes. Maybe Bill Orr copied the idea from Collins Radio? My take on Orr is that he was more of a merchandiser than an innovator. ** True, however, my guess is that the added XC on; /archives//html/Amps/2003-02/msg00296.html (8,611 bytes)

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