Virtual Valve Museum

Virtual Valve Museum

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CV51 tuning indicator

size This valve measures 102x40mm overall and has an octal base with one pin omitted.

The markings 48P51 appear on the side of the valve. The prototype for this valve is E1320.

Inside view

Heater voltage 6.3V
Heater current 0.3A
Max anode voltage 250V
Max target voltage 250V


Pin Function
1 n/c
2 Heater
3 Anode
4 Target
5 Grid
6 no pin
7 Heater
8 Cathode


top quarter bottom quarter