Power Amplifier Pentode
Various Name Brands
The 6F6 / VT-66 Vacuum tube is a metal type used in the
audio output stage of AC receivers.
It is capable of large power output with relatively
small input voltage. It requires an octal socket and may
be mounted in any position.
It is especially important that this tube, like other
power-handling tubes, should be adequately ventilated.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.7 A
Maximum Heater-Cathode Voltage Heater Positive with
Respect to Cathode:
DC Component .............. 90 V
Heater Negative with Respect to Cathode
DC Component............... 90 V
Preferred Substitutes: 6F6, 6F6G, 6F6GT, 6ô6,
6ô6C, VT66,