Nothing's new under the sun.
73,
Vic, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 13 Jun 2016 22:00, Bryan Swadener via Amps wrote:
Vic,
1986 to 1989. See http://lists.contesting.com/_amps/2014-04/msg00255.html.
Someone with the callsign "K2VCO" asked that question. Maybe you know him? ;-)
vy 73,
Bryan WA7PRC
Date: Mon, 13 Jun 2016
From: Vic 4X6GP
Subject: Re: [Amps] 3-500Z tube problems
.
I have seen a few of these in genuine Eimacs from a specific period. I don't
recall the date codes, but I'm sure someone here knows. The problem was bad
welds which allowed the grid assembly to move and touch the filament.
In the cases that I had, the short only appeared when the filament was hot. I
doubt that this could be cleared by an electrical procedure, but maybe a slap
on the tube in the right place would work, at least temporarily.
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