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CV453 heptode

size This valve measures 54x17mm overall and has a B7G base.

See also CV4012 which is based on this valve, and CV2024 which is a modified version of this valve.

Heater voltage 6.3V
Heater current 300mA
Max anode voltage 330V
Max G2 and G4 voltage 110V
Max G2 and G4 supply voltage 330V
Max anode dissipation 1.1W
Max G2 and G4 dissipation 1.1W
Max cathode current 15.5mA
Max G1 current 0.5mA
Conversion conductance * 0.47mA/V
Anode impedance * 1.0M ohms
Conversion conductance at Vg3=-30V 4.0µA/V
Capacitances (measured with close fitting metal screen)
Cag3 max 0.35pF
Cg3 - all 7pF
Ca - all 13.5pF

*: At Va=250, Vg2+Vg4 = 100, Vg1=0, Vg3=-1.5

Pin Function
1 Grid 1 (osc)
2 Cathode and Grid 5
3 Heater
4 Heater
5 Anode
6 Grid 2 and Grid 4
7 Grid 3 (signal)