[Top] [All Lists]

Re: [Amps] Amp Supply LK500ZB - strange failure mode

Subject: Re: [Amps] Amp Supply LK500ZB - strange failure mode
From: Vic Rosenthal K2VCO <>
Date: Fri, 03 Oct 2014 08:24:25 +0300
List-post: <">>
I've run into a number of Eimac 3-500Zs that developed filament to grid shorts. Often they test OK when cold.

On 10/3/2014 05:16, k0zx Rich wrote:
Turned out after pulling and swapping the tubes it pretty showed one had
the problem and the other didn't. Was looking in a different direction.
I am wondering if there was something else wrong that caused the tube
failure, though. Put the good one in both sockets, output definitely
less than half, but there may be a good reason for that which i'm not up
on yet. Either way, one step further down the path. Will keep the
rectifier board in mind, maybe that's what's behind the lower output.
Know a good source for reasonable prices for these things?

Vic, K2VCO/4X6GP
Rehovot, Israel
Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>