The Y448 is a 1000 watt dissipation tetrode. The usable frequency for maximum ratings is 110 MHz. This is similar to a 4PR1000A with a heavy filament. The first example was made by Amperex, the second is the origional by Eimac and the third by Triton who bought the glass making equipment from Eimac.

Length = 9.63" Diameter = 5.25"
Max voltage = 6000
Max current = 700 ma
Fil voltage = 7.5
Fil current = 30 amps         GOTO INDEX