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41. [Amps] Far East 3-500Z sources (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Sat, 15 Nov 2008 20:38:51 -0700; See my similar comment from 2006 here: http://amfone.net/Amforum/index.php?topic=6841.0 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c; /archives//html/Amps/2008-11/msg00159.html (7,399 bytes)
42. [Amps] Nice looking 1.8 MHz amplifier (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Sun, 30 Nov 2008 10:14:19 -0700; Greetings all, On ebay there is a very nice looking gg 160 meter amplifier, using 3CX3000A7. Some first-class components used, and not a bad layout either. Price is ridiculous considering now power s; /archives//html/Amps/2008-11/msg00259.html (7,254 bytes)
43. [Amps] metering HV on PAs (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 18 Dec 2008 17:47:35 -0700; Unless I am very lazy and cheap, I usually put a separate divider in for metering, or a series meter multiplier resistance. You can get 1 to 5 Meg skinny but long wirewound HV resistors from various; /archives//html/Amps/2008-12/msg00260.html (7,381 bytes)
44. [Amps] shielded HV connector (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Fri, 26 Dec 2008 11:46:14 -0700; Some commercial high voltage power supplies use a modified PL259 type connector. For the HV cable, they use the outer shroud of the male PL259, but the RG8 cable center conductor sticks out about 3 i; /archives//html/Amps/2008-12/msg00341.html (7,398 bytes)
45. [Amps] software for tube calculator (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Mon, 19 Jan 2009 00:03:02 -0700; Does it semi-automate the collection of points from the curves, i.e., prompt for the various Ip,Is, and Ig for various angles of a waveform? I created a program that did this in 1984, it still works; /archives//html/Amps/2009-01/msg00160.html (7,763 bytes)
46. [Amps] SB220 output (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 22 Jan 2009 19:50:25 -0700; The most i have ever seen on my heavily modified SB220 (but with OEM transformer and tubes) is about 1150 watts PEP using a peak reading Bird 43 into a dummy load. 1.5 kW - no can do. John __________; /archives//html/Amps/2009-01/msg00258.html (6,445 bytes)
47. [Amps] hi pot versus RF voltages (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Mon, 26 Jan 2009 13:15:04 -0700; Work was done in the early days of high voltage RF to try and correlate these different breakdown conditions. I have a collection of papers on the subject that I have researched over the years, due t; /archives//html/Amps/2009-01/msg00308.html (9,892 bytes)
48. [Amps] Crydom relays (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Wed, 28 Jan 2009 23:19:36 -0700; When I first used these in a medium powered broadcast TX design, I used them for everything except the plate contactor and step start relays. Had a lot of problems with the ones on the filament and b; /archives//html/Amps/2009-01/msg00341.html (7,254 bytes)
49. [Amps] SSR snubbers (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 29 Jan 2009 15:46:54 -0700; I cannot find info on the snubbers we used at BE Inc. on the transmitters, to keep the chatter from occuring in the SSRs when inductive loads switched in the system on the same power line and caused; /archives//html/Amps/2009-01/msg00354.html (7,812 bytes)
50. [Amps] pole pigs (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 29 Jan 2009 19:03:00 -0700; Bob These would probably used in a three phase setup with three pigs if they are single phase in each can. Where are they, in 5 land? I have been looking for a 240/12K unit for a someday big tesla co; /archives//html/Amps/2009-01/msg00364.html (7,802 bytes)
51. [Amps] pickin' out pole pigs (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Fri, 30 Jan 2009 19:20:37 -0700; Wow, what a difference 40 years makes. I imagine now that the legal department would have some words to say, and prevent such 'sensible' recycling due to liabilty, you might kill yourself or spill oi; /archives//html/Amps/2009-01/msg00373.html (7,225 bytes)
52. [Amps] PCB-based oil capacitors (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Wed, 4 Feb 2009 09:12:56 -0700; Odd that with all the talk about the health hazards, the advantages that PCB compounds brought to HV capacitors isn't mentioned. PCB is an additive that raised the flash point of oils to the point we; /archives//html/Amps/2009-02/msg00071.html (7,823 bytes)
53. [Amps] 50 watt zeners (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Mon, 9 Feb 2009 07:48:57 -0700; Microsemi makes a full line of big zeners, same as Motorola used to. 50 watt? No problem. Up to 200 volts, with the venerable 1N3350B. The have 591 types listed on the 50 watt page.... I use their pa; /archives//html/Amps/2009-02/msg00232.html (7,072 bytes)
54. Re: [Amps] Amps Digest, Vol 74, Issue 32 (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Mon, 9 Feb 2009 22:57:17 -0700; Carl That sounds familiar. About 10 years ago, I was driving on a street in Albuquerque, on the 'rough' side of town, in my 1982 Vanagon diesel. Yes, it was a slug. Anyway, the throttle cable broke a; /archives//html/Amps/2009-02/msg00254.html (8,056 bytes)
55. [Amps] SB220 mystique (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Tue, 10 Feb 2009 19:21:18 -0700; I've always considered the 220 as sort of a Dynaco project. David Hafler created the Dynakits and brought high quality but reasonably priced 'component' audio gear to thousands of stereophiles. Event; /archives//html/Amps/2009-02/msg00288.html (7,627 bytes)
56. [Amps] nichrome wire (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Tue, 10 Feb 2009 22:58:17 -0700; You can buy it from many sources, I just googled nichrome wire and got numerous answers to your question. Some sell it per foot, some per thousand. If you look at archives of this amps@contesting.com; /archives//html/Amps/2009-02/msg00301.html (7,636 bytes)
57. [Amps] Nichrome in VHF amplifier (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Wed, 11 Feb 2009 19:41:59 -0700; i the early 1980s I had a cavity amplifier project (88-108 MHz 5 kW) that came up with a particularly difficult parasite. It was the first use of a new Eimac tetrode, 4CX3500A, so there was a lot of; /archives//html/Amps/2009-02/msg00343.html (7,978 bytes)
58. [Amps] MGF1302/1502 GaAsFET (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Fri, 13 Feb 2009 08:04:38 -0700; Those are made by Mitsubishi. Search there electronics group website. They were used in many things, so they should be available somewhere. John K5PRO _______________________________________________; /archives//html/Amps/2009-02/msg00417.html (6,636 bytes)
59. [Amps] new records for Viking 500 (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Sat, 14 Feb 2009 23:29:19 -0700; The two Viking 500s that were on Ebay, both in excellent condx with modulator, sold for around $2800 and 3400 over the past week. With the economy so tight, somebody really wanted one badly. Ouch! Bu; /archives//html/Amps/2009-02/msg00463.html (7,220 bytes)
60. [Amps] Harris Power Amps (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 19 Feb 2009 08:44:19 -0700; I've had an RF103 and a 101. The 103 was a mess (3-1000Z gg), due to being in a basement of the Black hole junkyard for years. I parted it out, and was planning to reuse the transformer for a Chippew; /archives//html/Amps/2009-02/msg00559.html (8,228 bytes)

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