KT66

The Penta Laboratories KT66 is a high slope, indirectly heated beam triode designed principally for use in the output stage of audio amplifiers. It may also be used as an oscillator or R.F. power amplifier for frequencies up to 30Mc/s.

It is suitable for either single or push-pull audio operation, and may be employed as a triode with screen connected through a 100 ohm resistor to the anode.