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STC 3A/110A / CV1664 triode

Size This valve measures 115x45mm overall and has a 4 pin base.


Filament current 250mA
Nom filament voltage 4V
Max anode voltage 190V
Mutual conductance * 2.2mA/V
Amplification factor * 12
Anode impedance * 5500 ohms
*: At Va=130, Vg=-4.5.


Pin Function
1 Grid
2 Filament -ve
3 Filament +ve
4 Anode

Inside view


This file was last modified 23:10:11, Wednesday February 23, 2022