Virtual Valve Museum

Virtual Valve Museum

HomeFull List

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

CV4046 reliable double beam tetrode

Size The valve measures 80x45mm overall and has a loctal base.


Developed from CV415.

Heater voltage 6.3V
Heater current 1.6A
Max heater-cathode voltage +/- 150V
Max operating anode voltage 400V
Max anode voltage (Ia=0) 500V
Max dissipation per anode 8W
Max operating screen voltage 400V
Max screen voltage (Ig2=0) 425V
Max screen dissipation (both) 3W
Mutual conductance Va=250V;
Inner amplification factor (µg1g2) 6.5
Anode impedance 100k ohm
Max G1 cathode resistance for cathode bias 100k ohm
Max G1 cathode resistance for fixed bias 50k ohm
Max bulb temperature 225C
Max shock (short duration) 500g
Max acceleration (continuous operation) 2.5g
Max operating frequency, full ratings 200MHz
Max mean cathode current, per section 60mA
Max peak cathode current, per section 375mA
C in (nom) Per section 9pF
C out (nom) 7.5pF
Ca, g1 0.05pF
Ca', a'' 0.3pF


Pin Function
1 Heater
2 Grid 1 A
3 Cathode + beam plates A
4 Anode A
5 Screen grids (both)
6 Anode B
7 Cathode + beam plates B
8 Grid 1 B
9 Heater


Top quarter view Bottom quarter view