The GR1 is a 500 watt triode with a mu of 50 and a maximum frequency for full power of about 30 MHz. Made for the Siemens Ultratherm Diathermy Machine. These tubes were also made by United.
Length = 16.00" Diameter = 5.00" (body less extensions)
Max voltage = 5000
Max current =
Fil voltage = 22
Fil current = 13 amps GOTO INDEX