Diode-Pentode Tube.
The 12HE7 Vacuum tube is a duodecar type is a damper diode horizontal amplifier in color TV receivers.
The 6HE7, 12HE7, 38HE7 and 58HE7 contain a high perveance diode and a beam power pentode in a compactron
style bulb. The diode section is intended for service as a damping diode and the pentode is designed for
application as a horizontal deflection amplifier.
It requires a 12 pin socket.
Electrical Data:
Heater Voltage ........................ 12.6 V
Heater Current ........................ 1.35 A