Full-Wave Rectifier
The 80 Vacuum tube is a popular full-wave rectifier with
a four-pin base. They were used extensively in the power
supplies of radio and audio amplifier equipment designed
in the 1930s and was used in a vast number of radios from
the 1920’s well into the 1950’s. It is a glass type
having moderate direct-current requirements. It requires a
four-contact socket and should be mounted preferable in
a vertical position. Horizontal mounting is permissible
if pins 1 and 4 are in a horizontal plane.
The 80 (aka VT-80, 180, 280, 380) is a receiving
duodiode full-wave rectifier that uses a 5 volt heater.
The 80 is identical electrically to the 5Y3 and the 5Y4.
Over the years the 80 was produced in many different glass
envelopes including globes, two sizes of ST and T-9
tubular.
These Tubes were also used in WWII US Navy
Transmitter / Receiver radios.
Electrical Data:
Filament Voltage .............................. 5 V
Filament Current .............................. 2 A
Preferred Substitutes ....... VT-80, VT890, 180, 280, 380
Substitutes ................... 5Z3 83