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Vacuum tubes » HAM Radio tubes » GU74B / GU74-B / GU-74B / 4CX800A tube (sealed factory box)
GU74B / GU74-B / GU-74B / 4CX800A tube (sealed factory box)
$160.00
GU74B / GU74-B / GU-74B / 4CX800A tube (sealed factory box)
Click to enlarge
GU74B / GU74-B / GU-74B / 4CX800A tube (sealed factory box)
Click to enlarge

The Svetlana 4CX800A us a high-perfomance ceramic metal tetrode with a plate adssipation rating of 800 watts with forced air cooling. The perfomance characteristics of the 4CX800A allow its wo use as a hifg gain grid-driven RF amplifter or in grounded grid service. Full equivalent to the modern 4CX800A tube.

  • Name: GU74B;
  • Type: tetrode;
  • Cathode type: oxide, indirect heating;
  • Application field: power amplification in broadcasting and SSB equipment;
  • Brief application: amplification;
  • Envelope: metall-ceramic;
  • Cooling method: forced air;
  • Dimensions: 90mm x 71mm;
  • Mass: 0.55 kg;
  • Filament voltage: 12.6 V;
  • Filament current: 3.3 - 3.9 A;
  • Mutual conductance: 26 to 38 mA/V;
  • Output power: 0.6 kW;
  • Maximum anode voltage: 2kV/4kV in peak;
  • Maximum operating frequency: 150MHz.

    Tube is New, Old Stock. Each tube comes in factory box. Never used! Made in USSR.


  • Available quantity: 0 pc.

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