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ID = 8203
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Half-Wave Vacuum Rectifier   Text 
Identical to RK72 = RKR-72
Similar Tubes
Normally replaceable-slightly different:
  3B24 ; RX235

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Was used by Radar
Filament Vf 2.5 Volts / If 3 Ampere / Direct / Specified voltage AND current AC/DC

High-voltage vacuum rectifier. Anode to top cap. Used in T-2/APS-15 radar transmitter.

Thoriated-tungsten filament.

  • 22 kV anode PIV.
  • 20 mA DC

Replaceable by 3B24. Similar to RX-235.

Information source Babani, International Radio Tube Encyclopaedia   p. 288 & 289
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 50, p. 64 & 65
Taschenbuch zum Röhren-Codex 1948/49

rk72_sockel.png RK72: Raytheon Manual
Heinz Höger

Just Qvigstad
RK72: Raytheon Manual
Heinz Höger


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