In a message dated 11/19/2006 11:10:43 A.M. Eastern Standard Time, JMLTINC at aol.com writes: 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. Check to see if your grid shunt resistor/s on the grid meter are opened. Lou