Vacuum Tube - 12A4, Triode, Medium-MU
New-Old-Stock (NOS) tube
12A4 - Triode, Medium-MU
The 12A4 is a miniature, medium-mu triode intended primarily for use as a vertical-deflection amplifier in television receivers. The tube features high plate current at low plate voltages and is designed to withstand relatively high peak positive plate voltages. The heater is center-tapped to permit operation from either a 6.3 volt or a 12.6 volt heater supply.