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?
--
73,
Vic, K2VCO/4X6GP
Rehovot, Israel
http://www.qsl.net/k2vco/
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