[Amps] Henry 2KD-5 Problem

[TexasRF at aol.com]

Hi Ed, sounds like a leakage to ground somewhere on the B+ side of the  
plate supply. Perhaps a HV feed through lost it's insulation or plate bypass or 
 some other component in the B+ circuit has developed a leakage path to  
chassis/ground.
 
73,
Gerald K5GW
 
 
 
 
In a message dated 5/26/2011 5:18:23 P.M. Central Daylight Time,  
kb5gt at cableone.net writes:

Last  night I was using my 2KD-5, and it was working fine. After making
several  transmissions with no problem, it made a loud pop when keyed. Now
the grid  current indication goes off scale in the negative direction as 
soon
as it  is turned on, and stays there even with drive applied. It also has
plate  current flowing ( about 300 mA ) even when not keyed. It is still
working  and has output.
I have to get someone to move it to my workbench due to a  back injury, so
all I've done so far is to remove the top. The bias diode  reads 13.5 Kohm 
in
both directions when checked with one end of the 220 Ohm  parallel resistor
lifted, but I see nothing that made the loud pop, so  far.
When I get it on the bench I can get into it, but wondered if anyone  else
had seen these problems in this or a similar amplifier.
Thanks  & 73,
Ed,   KB5GT
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