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CV477 pentode

This valve measures 35x10mm overall and has a B8D/F base

Heater voltage6.3V
Heater current150mA
Max operating anode voltage165V
Max operating screen voltage155V
Max anode dissipation750mW
Max screen voltage350mW
Max cathode current16.5mA
Max heater-cathode voltage200V
Mutual conductance *4.5mA/V
Anode impedance *175k ohms
Capacitances (measured with close fitting metal shield
Cin (nom)4.3pF
Cout (nom)3.4pF
Ca,g1 (max)0.015pF

*: At Va=Vg2=100, Vg1=-10 (Ia=7.2mA approx, Ig2=2.0mA approx)

1Control grid
2Cathode + suppressor grid
4Cathode + suppressor grid
7Screen grid
8Cathode + suppressor grid


This file was last modified15:20:59, Tuesday September 02, 2014

  FOR SALE: Note that any valve which is not CV marked is now for sale. Contact me via email - see the home page.