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CV358 / 5A/157D HF pentode


size The valve measures 100x30mm overall.

Rear view - 5A/157D

Heater voltage 6.3V
Heater current 200mA
Max anode voltage 300V
Max screen voltage 125V
Max anode dissipation 1W
Max screen dissipation 0.3W
Mutual conductance Va=250V; Vg2=100V;
Anode impedance 2M ohm
Max operating frequency  125MHz
Cag1 max 0.01pF
Cae max 8.5pF
Cg1,e max 5.5pF



Pin Function
1 Metallising
2 Heater
3 Anode
4 Screen grid
5 Suppressor grid
6 n/c
7 Heater
8 Cathode
TC Control grid


CV358 CV358

This file was last modified 23:10:26, Wednesday February 23, 2022