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CV2276 / Z319 secondary emission pentode

Size This valve measures 54x19mm overall and has a B9A base.

Described in the EVS data as a single stage thermionic electron multiplier this is a high slope pentode for use as a wideband RF amplifier. It incorporates a single stage electron multiplier.

Heater voltage 6.3V
Heater current 300mA
Max anode voltage (Ia=0) 600V
Max operating anode voltage 500V
Max secondary cathode voltage (Ia=0) 500V
Max operating secondary cathode voltage 400V
Max screen voltage (Ia=0) 500V
Max operating screen voltage 300V
Max anode dissipation - Wa=Ia(Va-Vk2) 2W
Max secondary cathode dissipation - Wk2 = Vk2(Ik1-Ig2) 2W
Max screen dissipation 0.8W
Mutual conductance (Vg2=Vk2=250, Av=350, Ia=15mA) 19mA/V
Cae 3pF
Cg1,e 8pF
Ck2,e 3pF
Ca,g1 0.05pF


Pin Function
1 G3 + shield
2 G1
3 Cathode
4 Heater
5 Heater
6 G3 + shield
7 Anode
8 Secondary cathode
9 G2