Mail Archive Search: <+from:jtml@lanl.gov>

Results:

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

Total 562 documents matching your query.

361. [Amps] H2O cooled tubes (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 29 Oct 2003 10:31:44 -0700; To build a heat exchanger you can make some quick calculations to see what sort of heating you are dealing with. You will be dumping the plate dissipation, some filament power and some drive power (p; /archives//html/Amps/2003-10/msg00284.html (8,589 bytes)
362. Re: [Amps] H2O cooled tubes (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Fri, 31 Oct 2003 13:43:39 -0700; Oil works too. We use it at work to standoff 90 KV DC for big klystrons, while affording some cooling. We use Shell Diala. Biggest concern is leaks, what a mess it can make. There are some 3M heat tr; /archives//html/Amps/2003-11/msg00001.html (6,902 bytes)
363. [Amps] T'bolt and Desk KW (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 3 Nov 2003 16:06:07 -0700; The Junkston Thunderbolt is rather lightweight in performance, although heavy in mass. It runs the plate voltage low and runs 1 kW 'input'. However, it is completely tunable over the HF range (even o; /archives//html/Amps/2003-11/msg00031.html (7,520 bytes)
364. [Amps] another solar flare coming (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 5 Nov 2003 11:18:27 -0700; Folks here at work measured that the velocity of the particles from the solar flare last Tuesday (28th) was very fast from the sun. I saw Aurora Borealis here in New Mexico that night. HF was very qu; /archives//html/Amps/2003-11/msg00069.html (7,809 bytes)
365. [Amps] SB220 vote (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 5 Nov 2003 11:26:46 -0700; To add one more opinion, I also feel that the Heath SB220 is a classic, simple yet elegant design, which is timeless. While the green two tone cabinet reflects last century ergonomics, the circuit is; /archives//html/Amps/2003-11/msg00070.html (7,462 bytes)
366. [Amps] inductive tuned output network (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 18 Nov 2003 16:05:36 -0700; I think it was you, Bill, who inquired Nov 4 about the use of inductive tuning in the Johnson amplifier above 14 MHz. I just received an old Eimac W6SAI Amateur Service Newsletter from July 1970 titl; /archives//html/Amps/2003-11/msg00252.html (7,373 bytes)
367. [Amps] Care and Feeding of Power Grid Tubes, 5th Edition now (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 18 Nov 2003 16:14:54 -0700; The 5th Edition of this venerable work has been released, dated Aug 2003; I just got mine from CPI/Eimac, hand delivered by the marketing manager and VP engineering today on their visit today. It is; /archives//html/Amps/2003-11/msg00253.html (7,245 bytes)
368. [Amps] Care and Feeding Anodes (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 19 Nov 2003 16:06:44 -0700; yep sure did. J ** John: Did CPI/Eimac abandon the term "plate" and switch to "anode" like the rest of this planet? tnx _______________________________________________ Amps mailing list Amps@contesti; /archives//html/Amps/2003-11/msg00275.html (6,975 bytes)
369. [Amps] DC went to AC power transmission 112 years ago (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 24 Nov 2003 10:22:50 -0700; When the silver and gold mines near Telluride and Ourey, Colorado were producing in the 1890s, steam or water-driven dynamos provided DC to feed the mine machinery (water pumps, and compressors proba; /archives//html/Amps/2003-11/msg00349.html (8,368 bytes)
370. [Amps] sale of CPI pending, including Eimac Div (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 1 Dec 2003 13:22:06 -0700; Contacts: David Lilly of Kekst and Company For The Cypress Group ? ?? 212-521-4800 THE CYPRESS GROUP TO ACQUIRE COMMUNICATIONS & POWER INDUSTRIES, INC. New York, NY, and Palo Alto, CA, December 1, 20; /archives//html/Amps/2003-12/msg00016.html (11,194 bytes)
371. [Amps] how to reach maxwell capacitor co (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 9 Dec 2003 10:31:10 -0700; Maxwell is indeed alive. They are the General Atomics Energy Products Division of Sorrento Electronics. Its a long story and the names have changed a lot. But some of the same folks are there. Heres; /archives//html/Amps/2003-12/msg00148.html (7,330 bytes)
372. [Amps] running redlined (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 11 Dec 2003 11:21:49 -0700; Ed, N1TS, was certainly on target in his thorough explaination about the facts of running red or orange anodes in glass triodes and tetrodes. In some very old data sheets from Taylor tubes I have see; /archives//html/Amps/2003-12/msg00189.html (9,533 bytes)
373. [Amps] Bird water load ratings (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Sat, 13 Dec 2003 10:28:13 -0600; I have attempted to run 1 kW Bird water loads at higher peaks, in a pulsed amplifier for work. Talking to the Bird people convinced me that it was not a good idea, that thin film on ceramic resistors; /archives//html/Amps/2003-12/msg00225.html (7,714 bytes)
374. [Amps] 2500 W oil/water load ratings (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Mon, 15 Dec 2003 09:04:05 -0700; Paul and John, Thanks for juggling my brain. Yes, I stand corrected. I was thinking about the little Bird 1 kW water load, that is stricktly water cooled, by water flowing over and inside a single ce; /archives//html/Amps/2003-12/msg00252.html (10,163 bytes)
375. [Amps] measure inrush (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 7 Jan 2004 17:31:12 -0700; Happy new year to all the amplifier builders and experimenters with higher power RF here. When I designed step start for commercial transmitters i used a clamp on Fluke current transformer, and conne; /archives//html/Amps/2004-01/msg00087.html (6,736 bytes)
376. [Amps] SSRs for main turnon (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Fri, 9 Jan 2004 09:03:11 -0700; We used Crydom SSRs and other second sources (gordos, and others) in the Broadcast Electronics FM transmitters in early 1980s as a cost savings measure, and 'reliability enhancement' over typical mec; /archives//html/Amps/2004-01/msg00107.html (8,128 bytes)
377. [Amps] bad electrolytic capacitors (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 14 Jan 2004 08:12:50 -0700; Heard about this on the AM forum: In the conservative news forum free republic: http://www.freerepublic.com/focus/f-news/849190/posts The conmpanies mentioned included Teapo Electronic Corp, Jackcpn; /archives//html/Amps/2004-01/msg00142.html (8,714 bytes)
378. [Amps] tube blower time out (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Wed, 14 Jan 2004 10:19:29 -0700; Arne, Rich, I would agree with Rich's statement with the caveat "for tubes with glass envelopes and smaller ceramic metal tubes". However, Eimac tubes like 4CX3500A and up benefit from having a 15 -; /archives//html/Amps/2004-01/msg00143.html (9,324 bytes)
379. [Amps] iron (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Thu, 15 Jan 2004 11:29:52 -0700; Yep, more copper and quality steel weighs more. Cut copper and the transformer runs very hot, and/or runs closer to saturation on the BH curve. Higher loss, etc. You can run them very hot IF the insu; /archives//html/Amps/2004-01/msg00154.html (8,214 bytes)
380. [Amps] combine (score: 1): Author: "John T. M. Lyles" <jtml@lanl.gov>; Date: Tue, 20 Jan 2004 10:33:04 -0700; Hi jim, I wouldn't do 'air' combining, as you invariably will find dead spots in the overall radiation pattern, due to proximity effects of objects to each antenna, etc. Also it is expensive and take; /archives//html/Amps/2004-01/msg00200.html (7,761 bytes)

Current List: 361 - 380
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]