[Amps] <-- FW: Ameritron AL1500 help

[KA4INM radio]

Hi Ed es Matt,

I had the exact same problem a few years ago with my AL-1500.  Check 
that the machine screws that support the HV diode board through the 
bottom of the amp case are good and tight.   The diode board apparently 
grounds via the aluminum standoffs.  Mine were just a little loose and 
the contact resistance was just enough to allow the HV to float up a bit 
- which was causing the grid meter to read a negative current. 
Tightening the screws corrected the problem.

Hope this help you.

   ==  ==  ==  ==  ==  ==

   Every time I find a problem to be lose or corroded hardware* I add a 
wire, I have never been disappointed.
  * NOT uncommon
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.