Datasheet · Tetrode · GEC·MOV

TT21 datasheet

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Key TT21 specs at a glance

Type
Tetrode
Primary use
Power (PP)
Era
19570s
Heating
indirect
Heater
6.3 V / 1.6 A
gm (transconductance)
11.5 mA/V
Max plate voltage
1250 V
Max plate dissipation
37.5 W
Base
octal
Manufacturer
GEC·MOV
Equivalents
KT88 (different pinout)

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