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1. [AMPS] Alpha 86 qsk question (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Thu, 2 Dec 1999 11:38:32 -0700; Hi Paul... IF a first-character-clipping problem as you describe below exists with the ALPHA 86 itself, it's something I've never heard of in the ~13 years since ETO/ALPHA introduced that amp. The 86; /archives//html/Amps/1999-12/msg00011.html (9,590 bytes)
2. [AMPS] filament life again (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 30 Nov 1999 21:36:55 -0700; Hello John... ETO had some life data on the 8877s used in our MRI amplifiers by GE Medical, Philips Medical and others. It was presented as a curve as number of tube failures due to all causes (per m; /archives//html/Amps/1999-11/msg00004.html (11,844 bytes)
3. [AMPS] Cathode Lifetimes (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 2 Nov 1999 10:18:22 -0700; While we're all waiting for the compendium of amp articles - CD or otherwise - much of its value could be delivered at a small fraction of the effort & cost by a comprehensive bibliography of amps ar; /archives//html/Amps/1999-11/msg00079.html (9,423 bytes)
4. [AMPS] "Pulser" speed and Tune Up (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 2 Nov 1999 10:20:18 -0700; Hi Jim & all... If we're concerned about adjacent-channel and TV band fecundencies [my dictionary is 2 floor down and my spell-checker already rejected that one!], it's best to tune up for at least 1; /archives//html/Amps/1999-11/msg00080.html (12,098 bytes)
5. [AMPS] Re: Enameled wire size... (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 2 Nov 1999 20:02:00 -0700; Do you suppose there has been confusion of mils with mm? One mil = .001 inch One mm = .001 meter So one mm = 39.37 mils -- I think. 73, Dick W0ID Dave, about, "Roy, ckeck my math but . 1 mm = 1/254 i; /archives//html/Amps/1999-11/msg00099.html (8,075 bytes)
6. [AMPS] Alpha 76PA panel (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 26 Nov 1999 11:33:26 -0700; Hi Bob... I wouldn't be surprised if Alpha/Power has a new panel to fit your 76PA. They've done a good job of stocking replacements for painted sheet metal parts made during the mid-to-late 70's. You; /archives//html/Amps/1999-11/msg00510.html (9,340 bytes)
7. [AMPS] 4CX1600B Amplifier in new handbook (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Mon, 29 Nov 1999 08:28:01 -0700; Hi Ian & all.. May also be worth mentioning that (I think) the original Svetlana-built Russian military tube was the 4CX1600A, which is similar but not identical to the newer 4CX1600B. My impression; /archives//html/Amps/1999-11/msg00541.html (10,016 bytes)
8. [AMPS] amplifier problems (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 15 Oct 1999 11:41:04 -0600; Funny I don't remember any Jamie Jones at ETO... John Cunliffe, yes. Problems with step-start relays were and are very few. Principal cause of burned step-start resistors: owner fires up amp with cov; /archives//html/Amps/1999-10/msg00504.html (13,475 bytes)
9. [AMPS] amplifier problems (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 15 Oct 1999 11:41:13 -0600; I still can't remember you, Jamie. Help me out - when, where and in what job did you work at ETO? Tnx. Dick W0ID/W4ETO Rich, Mostly shorts because of carbon traces along the ceramic on the outside of; /archives//html/Amps/1999-10/msg00505.html (10,676 bytes)
10. [AMPS] RJ1A/RJ1H for Alpha 78 (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 15 Oct 1999 11:41:24 -0600; Hi Mike... Recent years' production of the Kilovac HC-1 vacuum relay (looks almost identical to Jennings RJ1-A and installs identically) has substantially more robust innards with far better bounce c; /archives//html/Amps/1999-10/msg00506.html (9,388 bytes)
11. [AMPS] RJ1A/RJ1H for Alpha 78 (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Sat, 16 Oct 1999 16:28:33 -0600; Supply voltage is around 36V as I recall -- I re-emphasize that the RJ1-A and HC-1 (current production, at least) are NOT interchangeable with respect to high speed switching. The Kilovac HC-1 has mu; /archives//html/Amps/1999-10/msg00521.html (9,547 bytes)
12. [AMPS] RJ1A/RJ1H for Alpha 78 (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Mon, 18 Oct 1999 15:26:46 -0600; Total time to end of contact bounce is the only parameter that really means anything in terms of closure time... 73, Dick thanks, Dick. I do not see how 36v OC is able to cause closure three to four; /archives//html/Amps/1999-10/msg00533.html (8,360 bytes)
13. [AMPS] G3RZP, W0AIH health reports (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Sun, 5 Sep 1999 19:18:10 -0600; Hi Ian... Awfully sorry to hear about Peter's infection! Please pass on my very best wishes -- and while you're at it, might ask if he got the info I passed on per his request a month or so back. Als; /archives//html/Amps/1999-09/msg00027.html (8,633 bytes)
14. [AMPS] Alpha 99 (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Sat, 18 Sep 1999 09:01:31 -0600; Bob... I don't think you have anything to worry about, and there's really no need to use ALC - fixed OR feedback type - to protect the tubes. 4CX800s in the ALPHA 99 are very well protected, as are t; /archives//html/Amps/1999-09/msg00157.html (8,461 bytes)
15. [AMPS] Re: swr (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Tue, 28 Sep 1999 12:49:44 -0600; Hi Pat... If the transmission line were ideal (lossless), actual SWR would NOT change regardless of its length or the point of SWR measurement. With real (lossy) transmission lines, actual SWR decrea; /archives//html/Amps/1999-09/msg00290.html (9,304 bytes)
16. [AMPS] Re: swr (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Thu, 30 Sep 1999 11:18:35 -0600; Hi Mike... No, SWR at the load/transmission line interface depends ONLY on the impedance mismatch at that point. SWR remains constant along the line except for the effect of line loss, which is to ca; /archives//html/Amps/1999-09/msg00353.html (11,801 bytes)
17. [AMPS] Pi-Net math (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Thu, 5 Aug 1999 17:19:12 -0600; I'm with you, Ian. Someone on this reflector very recently stated the basic, fundamental definition of "Q" as "(energy stored)/(energy dissipated)." I think "per cycle" is usually added. Ultimately t; /archives//html/Amps/1999-08/msg00122.html (11,757 bytes)
18. [AMPS] Pi-Net math (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 6 Aug 1999 11:48:34 -0600; Rich... Why do you find it so hard to comprehend that there's a FUNDAMENTAL definition of "Q" from which all other "descriptions" or adaptations descend? It's in basic engineering texts going back at; /archives//html/Amps/1999-08/msg00137.html (11,208 bytes)
19. [AMPS] Pi-Net math (score: 1): Author: w4eto@rmi.net (Richard W. Ehrhorn); Date: Fri, 13 Aug 1999 11:23:30 -0600; Hi Bob... With all due respect; your statement below appears to me to be incorrect. The addition of an "L" network to the output side of the plate pi adds another pole and typically increases harmoni; /archives//html/Amps/1999-08/msg00249.html (9,819 bytes)

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