[AMPS] Maximum Plate and Grid Current for 2 X 3-500Z amp ???

[K7xq@aol.com]

Hello,
 I just acquired a Heathkit SB-220 Amplifier that uses a pair of 3-500Z Tubes. The specification and manual do not indicate what the maximum allowable Plate and Grid Current can be. The specification from Eimac indicates 500 ma per tube which would be a total of 1 amp for a pair.What can I run without damaging the amplifier ( or what should i avoid is the real question ??)  

Can anyone help  me with these numbers ??

Keff K7XQ



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