Transmitting Tetrode
Eimac is a division of Varian
The 4-65A / 8165 Vacuum tube is used in amateur Radio transmitters such as:
Oltronix; Leek
Model ~ Hochspannungs-Netzgerät LS 529 R
USA Military Radios
Model ~ RT-1
Hallicrafters
Model ~ HT-19
Electrical Data:
Heater Voltage ........................ 6 V
Heater Current ........................ 3.5 A
Preferred Substitutes ................. 8165, QB3/200, CV1905, E-65A