[Amps] Grid Meter

[JMLTINC at aol.com]

Please help me; I have already searched the archives.

I have a Henry 3K Ultra (3CX1200A7) that suffered a plate choke flash-over. 
This took out the diode that holds B- near ground (as well as the safety diode 
and capacitor in the remote console). This has been repaired.

My problem is: when the amp is keyed (no drive) the grid meter slams forward 
against the peg. Does this with two tubes. Disconnect the filament leads and 
it does not budge.

The amp does idle with plate current just below 100ma, and does put out full 
power.

Any thoughts.

Thanks, folks.
-John, N9RF