[Amps] Recommended Idleing Current for Two 3CPX800A7 tubes?

[Don Kessler]

I'm sure someone here on this reflector would know so I'll ask:

What is the recommended zero-signal idleing current for a pair of 3CPX800A7 
tubes with an anode voltage of approximately 2800V and for an anode voltage 
of approximately 3200V?

I'm trying to setup the proper bias voltage for proper keying but I don't have 
seen several different amplifiers (all using this same tube) but with 
drastically differing idleing current.

Any help is appreciated!
Thanks,
Don