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ARP12 / CV1331 variable-µ HF pentode

Size This valve measures 95x33mm overall and has a mazda octal base.


Filament voltage 2.0V
Filament current 50mA
Max anode voltage 150v
Max screen voltage 150V
Anode current * 3.15mA
Mutual conductance * 1.1mA/V
Cag 0.01pF
Cae 10.0pF
Cge 8.0pF
*: At Va=120, Vg2=60, Vg1=0


Pin Function
1 Filament -
2 no pin
3 Anode
4 Screen grid
5 Suppressor grid
6 Metallising
7 no pin
8 Filament +
TC Control grid




The golden ARP12 was donated by Chris

This file was last modified 23:10:12, Wednesday February 23, 2022