Octal Base
Uf=6,3V
If=0,7A
6F6, KT63 Power Pentode. Octal base version of type 42. Moderate power output rating—9 watts max. (single-ended Class A circuit); 11 watts max. (push-pull Class A circuit); 19 watts max. (push-pull Class AB2 circuit). Available in metal (numbered "6F6"), shouldered glass ("6F6-G"), and cylindrical glass ("6F6-GT"). Sometimes used as a transformer-coupled audio driver for types 6L6-GC and 807 when those tubes were used in Class AB2 or Class B amplifiers. Also used as a Class C oscillator/amplifier in transmitters.
