Power Triode
Made in England and the USA!
The 811A Vacuum tube is a thoriated-tungsten-filament
type used as an AF power amplifier and modulator and as
a RF power amplifier and oscillator.
811A tubes are used in short wave radio transmitters like
the Globe King Transmitter 500 A
Johnson Viking 500
Viking Courier 240-352-1 or 240-352-2
MILITARY U.S.: Modulator - Power Supply MD-141A / GR
[Military] ID = 1097537
Climaster Zeus 331
Gonset GSB-201 3340
Gonset Linear Amplifier GSB-101
Heathkit Warrior HA-10
Miniphase Roma Linear Power Amplifier 750-L
It requires a small four-contact socket and may be
operated in a vertical position, base down, or in a
horizontal position with pins 1 and 4 in a vertical plane.
Electrical Data
Filament Voltage .............................. 6.3 V
Filament Current .............................. 4.0 A
Preferred Substitutes .....................
811, 811A, 811H, CV5043, GL-811A