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References: [ +from:jtml@lanl.gov: 562 ]

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61. [AMPS] rod stock for low loss (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 13 Nov 2001 11:07:08 -0700; And G7 is even lower loss than G10 material. The glue/binder is silicone based. But its harder to work with and nearly impossible to turn i a rod on lathe to cut 'wire' grooves. For this we have gone; /archives//html/Amps/2001-11/msg00232.html (8,162 bytes)
62. [AMPS] H2O cooled tubes (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Sun, 18 Nov 2001 11:55:19 -0700; Barry K. asked, Ian supplied a reasonable short answer. The long answer is: At my place of employment, we keep the water clean, using deionizer bottles (resin exchange?) from Culligan (US television; /archives//html/Amps/2001-11/msg00312.html (11,109 bytes)
63. [AMPS] glow through (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 19 Nov 2001 12:23:29 -0700; Most of our ceramics that are observable when operating (4CW250,000B) glow pinkish when the filament is lit. Same with 20 kV applied and beam turned on at a hundred amps, but its pulsed at only 10% o; /archives//html/Amps/2001-11/msg00341.html (7,104 bytes)
64. No subject (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 20 Nov 2001 10:10:22 -0700; Its a 12 VAC 10 Amp filament transformer, with taps for 10-14 V and dual primary voltages. -- -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative request; /archives//html/Amps/2001-11/msg00382.html (6,808 bytes)
65. [AMPS] diodes to try (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 20 Nov 2001 10:17:17 -0700; We use a lot (thousands are used, hundreds in series for 3 phase HV rectifier stacks for 90 kV 25 Amp power supplies) of IR 70H100A stud mount diodes (International Rectifier), they are impressive mo; /archives//html/Amps/2001-11/msg00383.html (6,738 bytes)
66. [AMPS] new FETs (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 27 Nov 2001 14:17:47 -0700; Advanced Power Technology in Oregon is coming out with the ARF1500 series of high voltage RF power MOSFETS. Due 4Q01, these monsters are for class C -->E operation, with 1500 watt dissipation limit.; /archives//html/Amps/2001-11/msg00439.html (7,362 bytes)
67. [AMPS] Xfmr Oil (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Wed, 3 Oct 2001 07:59:21 -0600; We use many gallons per year of Shell Diala X Transformer Oil. It is widely available from Shell jobbers, and comes in 55 gallon drums. There are much more expensive silicone based oils called Enviro; /archives//html/Amps/2001-10/msg00033.html (7,873 bytes)
68. [AMPS] WTB 51J4 (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Sat, 6 Oct 2001 19:24:31 -0600; Looking for Collins Radio 51J4 receiver, in gud shape. 6 kHz filter desired. John K5PRO -- -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2001-10/msg00129.html (6,353 bytes)
69. [AMPS] circuit breaker recommendation (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 8 Oct 2001 07:25:05 -0600; For years I have used panel mounted breakers like the Airpax, ETA, Potter Brumfield W91X series, Seimens, etc. I think a number of manufacturers have consolidated a bit, but most make similar package; /archives//html/Amps/2001-10/msg00169.html (8,970 bytes)
70. [AMPS] HV warning (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 11 Oct 2001 09:41:08 -0600; K7DD, Mike Baker, has printed a very detailed and wise treastise on the hazards of high voltage. Everything he said reminds me of various accidents and scenarios for accidents which I can remember. I; /archives//html/Amps/2001-10/msg00283.html (10,429 bytes)
71. [AMPS] HV warning (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 15 Oct 2001 08:29:03 -0600; Yes, we did this also. Lunchtime, a few brews, then back to high power RF test work. Even today, a beer at lunch doesn't seem abnormal, but two of them, well, depends on the person. For myself one is; /archives//html/Amps/2001-10/msg00339.html (8,547 bytes)
72. [AMPS] propagation (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Fri, 19 Oct 2001 12:30:40 -0600; The medium can't get much wierder than this.... check it out: -- -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.co; /archives//html/Amps/2001-10/msg00401.html (7,069 bytes)
73. [AMPS] metering (filament V) (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 22 Oct 2001 12:56:08 -0600; I would use small wires that can easily blow open (should you accidentally have a short on them later) or have small fuses with them. Filament voltage is typically measured at the socket pins unless; /archives//html/Amps/2001-10/msg00440.html (8,844 bytes)
74. [AMPS] resonant choke PS (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 23 Oct 2001 09:17:03 -0600; The resonant choke (L input filter) for power supplies can indeed operate at resonance, with a parallel capacitor that is rated for the 'tank' current and voltage. If the choke is tapped (as i had th; /archives//html/Amps/2001-10/msg00446.html (9,326 bytes)
75. [AMPS] more on resonant choke PS (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 23 Oct 2001 09:45:09 -0600; PIV at the rectifer was rated after measuring the voltage across the choke, with two HV probes and a differential measurement. I remember that it was about 2500 VAC, so thats why I had to use two cap; /archives//html/Amps/2001-10/msg00448.html (7,744 bytes)
76. [AMPS] info on resonant chokes II (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 25 Oct 2001 13:41:56 -0600; A couple of comments are warranted from the snippets of QSO that were reprinted earlier: A choke filter alone would also do. Or getting heavier service installed for such problems. For systems which; /archives//html/Amps/2001-10/msg00482.html (7,989 bytes)
77. [AMPS] amazing doubletalk... (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 13 Sep 2001 09:54:49 -0600; I am amazed at the lack of thought (I mean science) behind statements which frequently are repeated here. In the past years, this has been discussed and validated on this forum, and in professional R; /archives//html/Amps/2001-09/msg00230.html (12,330 bytes)
78. [AMPS] more on that topic (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 13 Sep 2001 11:42:38 -0600; Thanks for also bringing up the whiskers inside vacuum tubes. This is common, and the debarnacling process is part of standard processing of new tubes with handles, per instructions from CPI/Eimac, a; /archives//html/Amps/2001-09/msg00232.html (13,937 bytes)
79. [AMPS] gettering (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 13 Sep 2001 14:08:52 -0600; I recommend contacting the manufacturer for these questions. If you prefer to avoid Eimac, then talk to Claude Peterson at Econco in Woodland, CA. (800) 532 6626. He was involved with some of the gl; /archives//html/Amps/2001-09/msg00236.html (8,327 bytes)
80. [AMPS] get-ter (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 14 Sep 2001 08:42:37 -0600; Thanks for the information on the getters in 3-500Z and 8877, Tom. It is refreshing to hear factual info about some very common amateur power tubes. The man at Econco is very knowledgeble for some of; /archives//html/Amps/2001-09/msg00245.html (7,881 bytes)

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