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CV2238 audio output pentode

This valve measures 36x9x6mm overall and has 5 leads

Filament voltage1.25V
Filament current50mA
Max anode voltage100V
Max screen voltage100V
Anode current *3.1mA
Screen current *0.95mA
Mutual conductance *0.65mA/V
Max cathode current5.5mA

*: At Va=Vg2=67.5, Vg1=-6.5
1Anode (marked by red spot)
2Screen grid
3Filament +ve
4Control grid
5Filament -ve and suppressor grid


This file was last modified14:49:31, Tuesday September 02, 2014