MEDIUM - MU TRIODE
Various Brands
The 6C4 Vacuum tube is a miniature type used in compact
radio equipment as a
local oscillator in FM and other high-frequency circuits.
It may also be used as a class C RF amplifier.In such
service it delivers a power output of 5.5 watts at
moderate frequencies, and 2.5 watts at 150 MHz. This tube
requires a miniature 7-contact socket and may be mounted
in any position.
Electrical Data:
Heater Voltage ..................... 6.3 V
Heater Current .................... 0.15 A
Preferred Substitutes ............ 6135, EC90
Substitutes ....................... 6AB4 6DR4