[Amps] Question about grid current in 4CX or 3CX

[donroden at hiwaay.net]

Question :


For the larger tubes with handles  ( commercial service )

Does grid current increase or decrease as plate voltage and screen  
voltage is removed. ?

If it takes 250 watts to produce 100ma of grid current in a 4CX10,000.
is the grid just a big dummy load and is it doing the tube harm to  
dump 250 watts into it when both plate and screen voltages are removed ?


Don W4DNR