The 5658 or ML-5658 is a 20 KW water cooled triode with a mu of 20.5 and a frequency for maximum ratings of 15 MHz for full ratings.
Length = 10.50" Diameter = 6.50"
Max voltage = 12,500
Max current = 5 amps
Fil voltage = 12
Fil current = 190 amps GOTO INDEX