The GU-48 is a power triode intended for use in RF amplifier, oscillator, or class B modulator service. The GU-48 features rugged construction for high power RF transmitter applications. The envelope is fabricated from hard glass intended specifically for the high-temperature operation of transmitting tubes. The internal tube parts are supported by low loss ceramic insulators for high-temperature operation and high voltage hold-off.
GU – a letter that determines the type of tube: GU – generator tubes with a generation frequency of 30 to 300MHz;
48 – the number of the serial number of the development of this type of tube;
Technical specifications (at Un=10V, Ua=2.5KV, Ia=500mA):