Virtual Valve Museum

Virtual Valve Museum

HomeFull List

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

CV2000 HF pentode

Size This valve measures 56x21mm overall, not including the wires, and has 7 connections plus one to the central spigot.

This valve is a CV4002 (CV4014 is the pinned version) with a special base. The prototype is CV138. See also CV2031 which is a special version of the CV2000.

Heater voltage 6.3V
Heater current 300mA
Max heater-cathode voltage +/- 150V
Max anode voltage (Wa=3.0) 300V
Max anode voltage (Ia=0) 550V
Max anode dissipation 3.0W
Max screen voltage (Wg2=0.9) 300V
Max screen voltage (Ig2=0) 450V
Max screen dissipation 0.9W
Typical operating conditions
Va=Vg2=250V; Vg1=-2V; Vg3=0
Anode current 10mA
Screen current 2.5mA
Mutual conductance 7.6mA/V
Amplification factor 75


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



The valve below is marked CV2000 and EF91. The CV2000 label is clearly incorrect. See EF91.

CV2000/EF91 (incorrect spec)

Bottom quarter view