The 4CX3000A or 8169 is a 3500 watt, forced air cooled, tetrode with a maximum frequency for full ratings of 150 MHz.
Length = 7.90" Diameter = 4.63"
Max voltage = 7000
Max current = 2 amps
Fil voltage = 9
Fil current = 41.5 amps
Data sheet:
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