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Total 27 documents matching your query.

21. Re: [Amps] parasitic oscillation techniques (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Mon, 24 Aug 2009 16:44:49 -0500; If you will recall, in the mid-1980's, there was a massive recall of all 8877's by Eimac. The explanation was that they had a "heat-dam" problem, whatever that is. An undetermined number of the defec; /archives//html/Amps/2009-08/msg00463.html (10,782 bytes)
22. Re: [Amps] parasitic oscillation techniques (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 24 Aug 2009 18:08:05 -0400; Apologies if I've repeated this story in the past... There was a wave of contaminated Eimac 8877s that preceded the 1985 event. It nearly cost me my college job when I was working at a small FM stat; /archives//html/Amps/2009-08/msg00466.html (11,681 bytes)
23. Re: [Amps] parasitic oscillation techniques (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 24 Aug 2009 19:00:10 -0400; A manufacturing defect is a lot different than operational failure of a good tube. Eimac has had 3-500 defects also in the 80's I believe both problems were due to the move of production from San Car; /archives//html/Amps/2009-08/msg00470.html (12,115 bytes)
24. Re: [Amps] parasitic oscillation techniques (score: 1): Author: donroden@hiwaay.net; Date: Mon, 24 Aug 2009 22:07:55 -0500; Long story short: An AEL FM-2.5K transmitter Belated Condolences....... 43 years in Bdcast Tx repair. Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com; /archives//html/Amps/2009-08/msg00480.html (10,139 bytes)
25. Re: [Amps] parasitic oscillation techniques (score: 1): Author: "k7fm" <k7fm@teleport.com>; Date: Mon, 24 Aug 2009 20:48:15 -0700; Rich Measures name has come up, as well as purported comments from Eimac about his advice. The date of Rich's first article on parasitics was April 1986, in Ham Radio. Notably, it said nothing about; /archives//html/Amps/2009-08/msg00485.html (11,062 bytes)
26. Re: [Amps] parasitic oscillation techniques (score: 1): Author: Dave white <mausoptik@btinternet.com>; Date: Tue, 25 Aug 2009 11:47:00 +0100; That's a great story, Paul! Reid Brandon at Eimac (W6MTF to thee and me) has given me a lot of help too When I built my 3CX3000 amp a few years ago I had problems with very low gain having built a tr; /archives//html/Amps/2009-08/msg00489.html (11,281 bytes)
27. Re: [Amps] parasitic oscillation techniques (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Tue, 25 Aug 2009 14:04:46 +0300; ...probably whatever happened with the other companies who wanted young blood in their veins: moved under the heading that the Brits so succinctly call: the bloody companies. Instead of putting a "ta; /archives//html/Amps/2009-08/msg00490.html (12,439 bytes)

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