Description
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.
Equivalent tube: RCA 833A
Stamp of technical control department of the manufacturer “ОТК“
Technical specifications (at Un=10V, Ua=2.5KV, Ia=500mA):
- Filament current: 10 ± 0.8A
- Anode current (at Uс1= -50V): 130 ± 70A
- Anode current (at Ua=0.1KV, Uc1=100V): 700 ± 200mA
- Grid current (at Ua=Uc1=100 V) 215 ± 85mA
- Reverse grid current (at Ia= 150 mA): no more than 25µA
- Gain (when Uc changes by 20V, Ia=200mA) 35 ± 6
- Oscillatory power (at Ic1=95mA, at 40MHz): not less than 700W
Limiting performance:
- Filament voltage: 9.5-10.5V
- Anode voltage: 3KV
- Filament starting current: 15A
- Anode dissipation: 300W
- Operating frequency: 75MHz
- Envelope temperature: 270°C
Operating time not less than 1000 hours.
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