09-11-2013, 12:50 PM
P = Isq R, not very good for an ordinary valve as cathode drive for a loudspeaker, plus polarizing and biasing issues.
350ma through 8 ohm will just about give you 1 watt.
Also if a pentode or tetrode is used the speaker would be passing the standing screen current as well.
Also there will be a chicken and egg feedback/frequency response issue regarding any cathode ac decoupling.
Lawrence.
350ma through 8 ohm will just about give you 1 watt.
Also if a pentode or tetrode is used the speaker would be passing the standing screen current as well.
Also there will be a chicken and egg feedback/frequency response issue regarding any cathode ac decoupling.
Lawrence.
