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Brimar CV4068 / 6158 reliable double triode


This valve measures 53x19mm overall and has a B9A base.


This valve was based on the CV2212. See also CV4069 which is the flying lead version.

Heater voltage 6.3/12.6V
Heater current 600/300mA
Max operating anode voltage 300V
Max anode voltage (Ia=0) 550V
Max anode dissipation (per side) 5W
Max heater - cathode voltage 200V
Max peak cathode current 35mA
Max negative grid voltage -75V
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g
Mutual conductance * 2.3mA/V
Amplification factor * 32
Capacitances (per side, in close fitting metal screen)
Cin nom 2.2pF
Cout nom 2.0pF
Ca, g nom 1.9pF
Ca1, a2 0.46pF


Pin Function
1 Anode "
2 Grid "
3 Cathode "
4 Heater
5 Heater
6 Anode '
7 Grid '
8 Cathode '
9 Heater centre tap

This file was last modified 23:10:29, Wednesday February 23, 2022