The 4-500A is a 500 watt dissipation tetrode. The usable frequency for maximum ratings is 110 MHz. The 4-500A was designed for long life performance.
Length = 7.00" Diameter = 3.56"
Max voltage = 4000
Max current = 450 ma
Fil voltage = 10
Fil current = 10.2 amps
Data sheet:
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