[Amps] LK-500 Grid Current issue

[R. David Eagle]

Hello all...

I have been working on restoring an LK-500 NT to operating condition and it has a funny grid current issue.  When I switch the meter switch over on the front to measure the  grid current, the meter goes negative...????  This happens when the amp is in RX.

I'm puzzled....any help would be appreciated.

Thanks,

Dave
KB8NNU