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CV483 beam tetrode

Size This valve measures 70x37mm overall and has a 9 pin base.

The prototype of this valve is CV309. It is described as a beam power amplifier for use in aircraft.

Heater voltage 6.3V
Heater current 600mA
Max operating anode voltage 400V
Max anode voltage (Ia=0) 550V
Max operating screen voltage 250V
Max screen voltage (Ig2=0) 550V
Max anode dissipation 7.5W
Max screen dissipation 1.75W
Max heater-cathode voltage +/-150V
Max cathode current 55mA
Max peak cathode current 330mA
Max operating frequency 150MHz
Max bulb temperature 200C
Max shock (short duration) 259g
Max acceleration(continuous operation) 1.0g
Mutual conductance 3.0mA/V
Capacitances (without external screen)
C in (nom) 8.2pF
C out (nom) 6.0pF
Ca,g (nom) 0.07pF


Pin Function
1 Heater
2 Anode
3 Screen grid
4 Screen grid
5 Shield + beam plates
6 Cathode
7 Control grid
8 Shield + beam plates
9 Heater