Virtual Valve Museum

Virtual Valve Museum

HomeFull List

This is an archive website. It will not receive any updates, additions or corrections.

CV4070 / 6AQ4 reliable grounded-grid triode

Size This valve measures 53x17mm overall and has a B7G base.

Based on CV417 which also shares the 6AQ4 designation.

Heater voltage 6.3V
Heater current 300mA
Max anode voltage (Ia=0) 550V
Max operating anode voltage 275V
Max anode dissipation 3W
Max mean cathode current 17mA
Max heater cathode voltage 150V
Max grid cathode voltage 100V
Max operating frequency 250MHz
Max bulb temperature 165C
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g
Min grid voltage to ensure cut off to a slope of 100µA/V -8.0V
Mutual conductance (Va=250; Vg=-1.5) 8.5mA/V
Amplification factor 90
Capacitances (in close fitting metal screen)
Cg, kh nom 5.25pF
Ca, kh max 0.2pF
Ca, g nom 3.8pF
Ck, gh nom 8.5pF


Pin Function
1 Grid
2 Cathode
3 Heater
4 Heater
5 Cathode
6 Grid
7 Anode