[Milsurplus] History of the GO-series of USN Long-Range Transmitters

[Mike Morrow]

Summary of Characteristics of All Eleven GO-series Transmitting Systems

Data for all models:

Power Output:   125 W
Modes:          A1, A2
Power Supply:   115 vac, 800 Hz
                12 or 24 vdc

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GO      1933      CHS = Hygrade-Sylvania

CHS-52020    HF Transmitter,   4000 to 13575 kHz
CHS-52021    IF Transmitter,    300 to   600 kHz
CHS-?????    Rectifier Power Unit

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GO-1    1934      CW  = Western Electric

CW -52033    HF Transmitter,   3000 to 13575 kHz
CW -52034    IF Transmitter,    300 to   600 kHz
CW -20021    Rectifier Power Unit

NOTE:  GO-1 was canceled.

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GO-2    1935      CW  = Western Electric

CW -52053    HF Transmitter,   3000 to 13575 kHz
CW -52054    IF Transmitter,    300 to   600 kHz
CW -20042    Rectifier Power Unit

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GO-3    1937      CAY = Westinghouse

CAY-52070    IF Transmitter,    300 to   600 kHz
CAY-52071    HF Transmitter,   3000 to 13575 kHz
CAY-20054    Rectifier Power Unit

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GO-4    1938      CG  = General Electric

CG -52107    IF Transmitter,    300 to   600 kHz
CG -52108    HF Transmitter,   3000 to 26500 kHz
CG -20079    Rectifier Power Unit

NOTE:  This is the first transmitter capable of operating higher than the associated RU-series receiver upper limit of 13575 kHz, motivating the development of receivers with coverage above 26500 kHz:

  RAT    1939  13500 to 27000 kHz, plus RU-11 (224 to 13575 kHz), 12 vdc
  RAT-1  1939  13500 to 27000 kHz, plus RU-12 (224 to 13575 kHz), 24 vdc
  RAV    1940    190 to 27000 kHz, 24 vdc
  RAX-1  1940    200 to 27000 kHz, 24 vdc

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GO-5    1939      CG  = General Electric

CG -52117    IF Transmitter,    300 to   600 kHz
CG -20083    Rectifier Power Unit

NOTE:  GO-5 appears to have become part of GO-6.

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GO-6    1939      CG  = General Electric

CG -52118    HF Transmitter,   3000 to 22000 kHz

NOTE:  It appears that GO-5 and GO-6 made one complete transmitting system under GO-6 system nomenclature, consisting of:

CG -52117    IF Transmitter,    300 to   600 kHz
CG -52118    HF Transmitter,   3000 to 22000 kHz
CG -20083    Rectifier Power Unit

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GO-7    1940      CAY = Westinghouse

CAY-52144    IF Transmitter,    300 to   600 kHz
CAY-52145    HF Transmitter,   3000 to 13575 kHz
CAY-20103    Rectifier Power Unit

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GO-8    1940      CAY = Westinghouse

CAY-52187    IF Transmitter,    300 to   600 kHz
CAY-52188    HF Transmitter,   3000 to 13575 kHz
CAY-20103    Rectifier Power Unit

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GO-9    1940      CAY = Westinghouse

CAY-52192    IF Transmitter,    300 to   600 kHz
CAY-52193    HF Transmitter,   3000 to 18100 kHz
CAY-20103    Rectifier Power Unit

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GO-9a   1944      CAY = Westinghouse

CAY-52192    IF Transmitter,    300 to   600 kHz
CAY-52193a   HF Transmitter,   2200 to 18100 kHz
CAY-20103    Rectifier Power Unit
CAY-50178    Noise Modulating Unit

NOTE:  Modified from the GO-9.

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Principal Sources:

NAVSHIPS 900,109 Navy Type Number Book  - September 1945

1.  List of Type Numbers Assigned to Naval Electronic Equipment
    NAVSHIPS 900,109, September 1945
2.  List of Naval Radio, Radar, and Sonar Equipment
    SHIPS-242A, January 1945

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This may be the first attempt made to address development of GO-series transmitters.  Of course, I welcome comments, discussion, suggestions, and corrections to the above.

Mike / KK5F