[Amps] SB-200 plate current

[Jeff Stewart]

    About what plate current max and minimum should I see depending on the age of the 572b's of course?  What's normal grid current also?
    I know the manual says don't go over 500ma on the plate,  but I see only 200ma however the relative output on the amp shows about 600 watts on a dummy load.  Seems like the Plate current is onlly half what I should see.

Thanks,
Jeff
http://www.qsl.net/ka9dad/