The ZB-3200 is a 2500 watt, zero bias, triode with a mu of 75 and a maximum frequency for full output of 10 MHz. Made by Amperex. I believe that this and the HF-3000 are the largest all glass tubes ever made.
Length = 21.50" Diameter = 6.00"
Max voltage = 8000
Max current = .960 amps
Fil voltage = 22
Fil current = 40.5 amps
Data sheet:
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