High-Mu Triode
See 4HA5. It is the exact same tube.
The PC900 Vacuum tube is a miniature type used as an
RF-amplifier tube in VHF TV tuners. It requires a
miniature 7-contact socket.
Electrical Data:
Heater Voltage ................................ 3.9 V
Heater Current ................................ 0.3 A
Preferred Substitutes .................. 4HA5, 4HK5, 4HQ5