PX25 DET5 Marconi GEC ultra rare pair valves old service code NT40 power amplifying valves CV384

Description

The DET5 made by GEC or NT40 is a power amplifier triode a CV designation of UK Navy.

Has a special anode box which is made of molybdenum.

Unlike the PX25, the DET5 NT40 is capable to operate at 600 Volts anode, hence making it  versatile for audio purposes.

Valves feature ribbed plate, large getter with all filaments perfectly hooked up, excellent sound with code on glass .

In mint excellent condition and working order

Tested with AVO VCM 163

DET5 GEC NT40 DET 5 {1} 64mA 100% emission mA/V 7.3

DET5 GEC NT40 DET 5 {2} 63mA 100% emission mA/V 7.2