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STC CV4064 / S6F33 reliable HF pentode with a limiting diode connected to G3

Size This valve measures 52x16mm overall and has a B7G base.

The prototype of this valve is the CV2209. See also CV4083.

Heater voltage 6.3V
Heater current 350mA
Max heater cathode voltage +/-150V
Max operating anode voltage 300V
Max anode voltage (Ia=0) 550V
Max operating screen voltage 300V
Max screen voltage (Ig2=0) 400V
Max anode dissipation 3.0W
Max screen dissipation 1.5W
Max bulb temperature 200C
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g
Inner amplification factor 42
Mutual conductance 4.0mA/V
Cin nom 7.55pF
Cout nom 4.55pF
Ca-g1 max 0.015pF


Pin Function
1 Control grid
2 Cathode
3 Heater
4 Heater
5 Anode
6 Suppressor grid + diode
7 Screen grid



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