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Tung-sol 5T8 triple diode triode

Size This valve measures 53x20mm overall and has a B9A base.

This is a triple diode high-µ triode intended as a combined AM and FM detector and a/f amplifier. This particular example is an engineering sample, dated 8/9/54.

Heater voltage 4.7V
Heater current 600mA
Max anode voltage 300V
Max anode dissipation 1W


Pin Function
1 Diode 3 anode
2 Diode 2 anode
3 Diode 2 cathode + shield
4 Heater
5 Heater
6 Diode 1 anode
7 Cathode + shield
8 Triode grid
9 Triode anode

Donated by William Donzelli

This file was last modified 15:55:30, Tuesday September 02, 2014