41MH Cossor balloon mesh plate clear glass and metalized glass Holy Grail audio valves and detector triodes

Description

The Cossor 41MH was first introduced in 1930 as a detector triode. We offer two versions:

Pair with clear glass.

Pair with coated metalized glass.

The saga of such a durable valve goes on these days where it is used as input signal triode for audio application using power valves such as PX4 PX25 and so forth.

All four Cossor 41MH balloon valves have been tested 100% emission and in working order.