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ID = 80566
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Transmitting Triode, air cooled 
Identical to TYS5-3000
Similar Tubes
Normally replaceable-slightly different:

Base Wires only.
Was used by Transmittertube (Radio)
Filament Vf 20.5 Volts / If 26 Ampere / Direct

RF amplifier or oscillator. Silica bulb, flexible flying leads. Intended for use in RF heating or industrial equipment.

  • 3.500 W anode power
  • 6 kV max anode voltage at 3.0 MHz
  • 4 kV max anode voltage at 20 MHz, forced-air cooling required
  • 2.800 mA cathode current max
Dimensions (WHD)
incl. pins / tip
104 x 542 x mm / 4.09 x 21.34 x inch
Weight 1300 g / 45.86 oz
Information source - - Manufacturers Literature   
TYS5-3000: Ebay auction, October 2020
Emilio Ciardiello


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