Virtual Valve Museum
Virtual Valve Museum | search: (use * for wildcard)
About the museumMuseum exhibitsUpdates, new exhibits etc.EquipmentSupporters
*DocumentsValves wanted!Valves for sale or for tradeLinks to other sites, suppliers etc.

CV1221 transmitting pentode

Size
 This valve measures 248x63mm overall and has a 4 pin T4 base

Filament voltage10V
Filament current2A
Max anode voltage1500V
Max screen voltage500V
Max anode current *150mA
Total cathode current *200mA
Mutual conductance **1.7mA/V
Continuous anode dissipation75W
Screen dissipation20W
Capacitances
Caf20pF
Cgf26pF
Cag0.05pF

*: These values apply for use of the valve as an unmodulated Class C amplifier at not less than 15 metres wavelength
**: At Va=1500, Vg2=400, Ia=60mA

Pins: base view, clockwise from the index pin: screen grid, filament, control grid, filament. The base shell is the suppressor grid connection and the top cap the anode.

 CV1221

This file was last modified16:22:13, Monday April 03, 2023