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PT15 / VT104 / CV1104 pentode


Size This valve measures 185x50mm overall and has a 5-pin B5 base.

Two of these valves were used as the RF PA in the famous T1154 transmitter of WWII. See also CV1240 which is a modified version.

Filament voltage 6V
Filament current 1.3A
Max anode voltage 1250V
Max screen voltage 300V
Max anode dissipation 30W
Mutual conductance
(Va=1kV; Vg2=300V; Ia=40mA)
Cae 14.0pF
Cge 21.7pF
Cag max. 0.11pF


Pin Function
1 Screen grid
2 Control grid
3 Filament
4 Filament
5 Suppressor grid
TC Anode
PT15 /VT104

Top quarter view Bottom quarter view

This file was last modified 23:10:40, Wednesday February 23, 2022