Eastern Portables
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  139

Is a Chinese receiver with seven tubes. The same receiver is used in the Chinese shortwave radio S 1031.

It also can be used as Telephone.

S 1031 and 139 have the same usage, frequency range and number of bands as the Western Transmitter / receiver GRC-9 and the Western receiver R-77: Transmitter and receiver are devided sets, to be tuned independently. The receiver 139 was used, like the R-77, for airraid warnings, ABC warnings etc.

Frequency range:
3 bands:
  • 2 ... 3.8 MHz
  • 3.8 ... 7 MHz
  • 7 ... 12 MHz
  •  


    Technical data:
    Mode:
    CW, AM, Telephone
    Tubes:
    7
    Sensitivity:
    CW: < 7µV
    AM: < 14 µV
    Battery:
    Internal or external
    Voltages needed:
    1.5 V and 90 V
    Antenna:
    Wire antenna
    Accessories provided:
    Tubes, fuses