Sensibly equivalent¶ to:
This is the co-axial connection version of the 4CX250B tetrode. This exhibit was withdrawn from commercial service in 1989. In parallel push pull they are used in compact 1 kW VHF transmitters.
The design is made for forced air cooling. The radiator fins are clearly visible in the picture.
The co-axial envelope is 40 mm in diameter and, including the base, is 65 mm tall.
Reference: Data-sheet. Type 4CPX250K was first introduced in 1970.
Absolute Maximum Operating Conditions¶
Updated October 05, 2020. shape:co-axial construction:disc.seal.(ceramic) type:tetrode age:1960.1975 base: heater:6.0v pins:8 pin: