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ID = 17825
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to RX235
Similar Tubes
Normally replaceable-slightly different:
  72 ; CV709 ; RK72 ; RKR-72

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, similar to 72 with stepped bulb and with large anti-corona top cap.

Thoriated-tungsten filament

22 kV peak inverse voltage, 20 mA DC.

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

72_1.png RX235: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad

Collection of



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