[Amps] SB-220 grid current

[Gudguyham at aol.com]

In a message dated 11/25/2006 12:28:05 P.M. Eastern Standard Time,  
w8ji at w8ji.com writes:


In a  GG amp a negative grid meter swing is caused by a short 
from the cathode  to chassis ground. That can be a shorted 
tube or anything on the cathode  shorted to the chassis.




In an Sb-220, if the amp works fine and the only problem is negative going  
grid meter, the .82 grid meter shunt is opened.  If the amp does not  operate 
normally, then what Tom suggests is possible.   Lou