RSGB British Army, Navy
and Air Force Prefixes

BRITISH ARMY VALVES

        ACR     Army Cathode Ray Tube
        AR      Army Receiving Valve
        ARD     Army Receiving Diode
        ARDD    Army Receiving Double Diode
        ARH     Army Receiving Hexode
        ARP     Army Receiving Pentode
        ARS     Army Receiving Tetrode (Screen-Grid)
        ARTH    Army Receiving Triode Hexode
        ARTP    Army Receiving Triode Pentode
        AT      Army Transmitting Triode
        ATP     Army Transmitting Pentode
        ATS     Army Transmitting Tetrode (Screen-Grid)
        AU      Army Rectifer
        AW      Army Gas Filled Valve (Stabilizer)
         

ROYAL NAVY VALVES

        NC      Navy Cathode Ray Tube
        NOT     Navy Gas Triode
        NR      Navy Receiving
        NS      Navy Stabilizing
        NT      Navy Transmitting
        NU      Navy Rectifying


ROYAL AIR FORCE VALVES

        VCR     Valve Cathode Ray
        VUT     Valve Gas Triode
        VI      Valve Indicating
        VR      Valve Receiving
        VS      Valve Stabilizing
        VT      Valve Transmitting
        VU      Valve Rectifying

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