Scott,
Its sounds like one of your new tubes is gassy giving rise to
leakage current from plate to grid. Try rotating out the new
tubes one at a time until you find the culprit.
Good luck!
73 de Mike, W4EF.....................
----- Original Message -----
From: "Scott Nichols" <snichols@mvosprey.com>
To: <amps@contesting.com>
Sent: Saturday, May 18, 2002 9:33 AM
Subject: [Amps] AL811H
> I just replaced all 4 tubes in my Ameritron AL 811H amp...When I turn it
> on, the Plate Current (Ip) goes to 75 mA, and the Grid Current meter
> pins itself fully left (less than 0 mA)...The HV is OK at 1800 volts...I
> think I put everything back together the way it was before I took out
> the old tubes...
>
> Anyone know what gives here? I am NO expert at this stuff...Customer
> service not there on Saturday!!
>
> Thanks,
>
> Scott VE1OP
>
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