Power Pentode
The box has seen better days. The tube however is brand
new.
The TAD - Tube Amp Doctor EL34B - STR Vacuum tube is a
glass octal type pentode used in the output stage of
audio-frequency amplifiers. It requires an octal
socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.5 A
Preferred Substitutes ...................... EL34,
6CA7.