Twin Diode - Medium-Mu Triode
This is a RARE Collectors tube! It is New Old Stock and
comes in a stock Sealed original box. The Box is in Very
Good Condition.
These Tubes were Made Around 1937.
The 55 Vacuum Tubes is a glass type used as a combined
detector, amplifier and AVC tube. It requires a
six-contact socket.
Electrical Data:
Heater Voltage ............. 2.5 V
Heater Current.............. 1 A