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CV18 double triode

Size This valve measures approx 130x46mm overall and has a 7 pin base.

This valve was used in the output stage of the Spitfire radio.

Heater voltage 6.3V
Heater current 800mA
Max anode voltage 300V
Max anode dissipation,per anode 5.0W
Mutual conductance * 2.8mA/V
Anode impedance * 5000 ohms
Amplification factor * 14
Max operating frequency 175MHz
Capacitances (apply to each half)
Ca-c+h 0.6pF
Cg-c+h 4.1pF
Cag 2.45pF
Ca1-a2 1.1pF

*: At Va=250, Vg=-7

Pin Function
1 Heater
2 n/c
3 Grid 1
4 Cathode
5 Grid 2
6 n/c
7 Heater
TC1 Anode 1
TC2 Anode 2


This file was last modified 23:10:18, Wednesday February 23, 2022