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CV4084 reliable vari-µ HF pentode

This valve measures 47x17mm overall and has a B7G/F base

This is the flylead version of CV4015

Heater voltage6.3V
Heater current200mA
Max heater-cathode voltage±150V
Max operating anode voltage300V
Max anode voltage (Ia=0)500V
Max anode dissipation3W
Max operating screen voltage300V
Max screen voltage (Ig2=0)300V
Max screen dissipation700mW
Mutual conductance (see note A)2.45mA/V
Inner amplification factor (µg1 g2) (see note A)30
Max grid 1 - cathode resistance for cathode bias500k ohms
Max grid1 - cathode resistance for fixed bias100k ohms
Max bulb temperature200°C
Max shock (short duration)500g
Max acceleration (continuous operation)2.5g
Capacitances (measured with close fitting metal screen)
Cin (nom)4.5pF
Cout (nom)7.0pF
Ca,g1 (max)0.01pF

(Note A: measured at Va=250V; Vg2=200V; Vg3=0; Vg1=2.5V; Ia=8.25mA approx.; Ig2=2.1mA approx.)
1Control grid
6Suppressor grid and shield
7Screen grid


This file was last modified23:10:29, Wednesday February 23, 2022