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CV1722 / (PO) VT179 / A901 tetrode

Size This valve measures 110x45mm overall and has a B7 base.


Nom heater voltage 5.5V
Heater current 1.4A
Max anode voltage 135V
Max screen voltage 135V
Mutual conductance (Va=Vg2=130, Ia=70mA) 10.0mA/V
Cag max 5pF
Cae max 15pF
Cge max 25pF


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


Above: CV1722; Below: (PO) VT179 / A901

PO VT179

Donated by Bryan Lonsdale

This file was last modified 23:10:17, Wednesday February 23, 2022