[Amps] [AMPS] Drake L-4 negative grid current reading on meter

[Kevin G. Wagner]

All,

    I'm having a problem with my Drake L-4 amplifier. A few weeks ago  
the .082 resister blew because one of the cap's let go in the power  
supply. I replaced all the cap's, diodes and the .082 resister in the  
power supply and whet to check out the amp. When I turned it on I  
have a negative grid current reading on the meter. It slams to the  
left at rest and when I key the amp it reads zero. I have purchased  
new tubes (3-500Z's) and I still have the problem. I then tried to  
calibrate the grid meter using the procedure in the Drake manual with  
no luck. I'm thinking it's a meter problem.
Please help.

73,
Kevin
w2fa