Lot - 1pcs. 
(Large quantity available)

 GU-48 Power Triode Tube
POLARON
Equivalent to tube: RCA 833A
NOS
New from storage, without original BOX 

Attention:  
  • The tubes will be sent to you without the original packaging to minimize shipping costs.
  • Dates and Prints on tubes may not match what you receive upon purchase.
The GU-48 tube generator triode, an improved version of RCA 833A tube.
Well regarded by ham radio fans and hi-end audio tube amp builders.


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.


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):
  • 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
Durability is not less than 2000 hours.

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