STC CV1994 / 3Q/121E air cooled triode
This valve is a CV28 supplied without the air cooling fins. Cooling fins 10AR/2436 need to be fitted before the valve is used.
(1) Valves are marked with the filament voltage which may differ from valve to valve
(2) With forced air cooling this figure can be 1.1kW
(3) At Va=5kV, Ia=200mA
Connections: The longer strap leads are the filament.
An example with the cooling fins fitted (photo by Mark Atherton)
This file was last modified
23:10:19, Wednesday February 23, 2022