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United CV137 diode triode


Size This valve measures 53x17mm overall and has a B7G base.

See also CV4059 which is based on this valve.

Heater voltage 6.3V
Heater current 300mA
Max anode voltage 300V
Max anode dissipation 2W
Max mean cathode current 11mA
Amplification factor Va=250V;Vg=-3V (Ia=8mA) 36
Mutual conductance 2.5mA/V
Max frequency As frequency changer 300MHz
As oscillator 600MHz
Max peak anode current 55mA
Max mean anode current 5.5mA
Max PIV 400V
Cin (nom) 1.85pF
Cout (nom) 1.15pF
Cat,g (nom) 1.7pF
Cg,ad (nom) 0.05pF
Cat,ad (max) 0.2pF
Cad,cd (nom) 1.6pF
Cct,cd (nom) 0.01pF
Cad,h (max) 1.0pF


Pin Function
1 Diode anode
2 Diode cathode
3 Heater
4 Heater
5 Triode cathode
6 Triode grid
7 Triode anode



This file was last modified 23:10:15, Wednesday February 23, 2022