Virtual Valve Museum

Virtual Valve Museum

HomeFull List

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

CV1567 / DET25 triode

This valve measures 175x55mm overall and has a 4 pin base. 

The CV Register indicates that the CV1567 is based on or equivalent to CV1025; the EVS sheet for CV1025 indicates it is a DET25. This valve carries both DET25 and CV1567 part numbers.

Filament voltage 7.5V
Filament current 1 to 3A
Max anode voltage 1200V
Max anode dissipation 36W
Mutual conductance * 2.1mA/V
Anode impedance * 4800 ohms
Amplification factor * 10
Maximum frequency 15MHz
Cae 4.5pF
Cge 6.0pF
Cag 7.0pF

*: At Va=1200, Ia=30mA

This valve was developed from the DET1 with an M-shaped filament giving better mutual conductance the grid and anode are far wider in cross section. The anode is carbonised nickel.

Pin Function
1 Anode
2 Filament
3 Filament
4 Grid

CV1567 / DET25