TT21 GEC CV8286 transmitting valves close equivalent KT88 GEC

TT21 GEC £ 400 pair

TT21 GEC £ 700 quartet

Description

Both TT21 and TT22 by GEC are the same valves and they only differ for heater voltage.

The TT21 shown here are the 6 Volts heater version and are quite similar to a KT88.

The TT21 has top cap anode rest is similar to a KT88

Tested with AVO 163 at:

TT21 GEC tested 60mA

TT21 GEC tested 60mA

TT21 GEC tested 56mA

TT21 GECF tested 53mA

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