4CX300 SP

This tetrode is a 4CX300A (4CW300?) that has been fitted with a water jacket. No known number has been assigned to this tube. It has been reported that Joe Jennings had some of these tubes made for an experimental antenna/amplifier assembly that used water to cool the tube and tune the vertical mobile antenna. The characteristics for the 4CX300A are given.

Length = 3.25" Diameter = 1.50"
Max voltage = 2500
Max current = 250 ma
Fil voltage = 6
Fil current = 2.6 to 3.1 amps         GOTO INDEX