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

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