"Paul D. Spiegel" wrote in message
...
A constant current source (CCS) can be used to bias a tube in place
of the cathode resistor. In this case, does the maximum grid resistor
rating follow the spec for cathode or fixed bias? Does the 'rule' apply the
same to a single triode as to a differential amp?

Thanks for your comments, RAT contributors.
Follow the specs for cathode bias.