If you mean 200 ma not 0.2 ma - very likely a blown transistor in the 81537
FILAMENT_AC board which has the bias regulator transistors and zener on it .
Used to be a 2N3055 and a MPSU101 - and 8.2 v zener.
Later they used a ON Semi MJ15001 instead of the 2N3055 and a MPSW42 for the
I suspect you will find the 3055 shorted.
I would replace both after I am in there - only hard part is unsoldering the
big transformer wire in the eyelet on the board . Rest is easy .
You might want to check cal if there was a big enuff surge - I have had the
meters get slightly demagnetized and they read low -
Been there - done that - twice - but now have 3.3volt zeners acropss both
meters so will never happen again .
73 de hank K7HP
----- Original Message -----
Sent: Wednesday, December 15, 2010 3:45 PM
Subject: [TenTec] Centurion 422
>I had a 3 500Z Gas and blow a line fuse. Replaced the one tube. On turn
>on in standby plate voltage is 3100 but show .2 ma plate current.
> Ralph W7JU
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