[Amps] Henry 2KD-5 Problem

[TexasRF at aol.com]

Which can be confirmed by removing the tube(s).
 
73,
Gerald K5GW
 
 
 
In a message dated 5/26/2011 5:32:26 P.M. Central Daylight Time,  
ww4cox at embarqmail.com writes:

You have  a shorted tube.
----- Original Message ----- 
From: ED  MCKIE 
To: amps at contesting.com 
Sent: Thursday, May 26,  2011 6:18 PM
Subject: [Amps] Henry 2KD-5 Problem


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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