Medium-Mu Triode ~ DeForest
The DeForest 427 Vacuum tube is a glass type used as a
voltage amplifier or detector in AC-operated receivers. It
requires a five-contact socket.
Electrical Data:
( RCA RC-13 - 1937)
Heater Voltage ................................ 2.5 V
Heater Current ............................... 1.75 A
Substitutes ...................................
27, 56, C327, D227, DE-1, ER227, UY227, UY-227_Japan
27, 56, C327, D227, DE-1, ER227, UY227, UY-227_Japan