Solosender S 100/100B (for 100 MHz)

It also was built for 80 MHz: Solosender S 80/100

"Solosender" is a transmitter used for railway tasks. It is a transmitter only, transmitting call tones and voice. An answer, if necessary, comes by loudspeaker, signs etc.

When assembling a train, a shunter could test the brake installation of a complete train. The call tone of the Solosender was received in the engine. The receiver opened a magnetic valve which in turn operated the brakes. An instrument at the end of the train showed the 100 % operation of the brakes.

The built-in microfone was meant for warning purposes. A receiver was connected to the station's amplifier; warnings could be given out directly to the loudspeakers.

The small "roof" of the antenna in the first place is meant for protection of the operational elements, since the radio is a "momentary" radio only. In addition it has the useful side affect, that the additional roof capacity shortenes the antenna to a size smaller than lambda/fourth and still is resonant.

Frequency range:

about 100 MHz

HF output:

100 mW ( you also could order 50 mW)

Mode:

F3

Channels:

3

Channel spacing:

50 kHz

Call tones:

Call 1: 1750 Hz;

Call 2: 2135 Hz

Antenna:

Extendible antenna lambda/fourth; electrically shortened

Powered by:

12.5 V; 150 mA

Operational time:

3 hrs transmitting time

Active elements:

10 Transistors ( 6 HF-; 4 NF- )

2 Germanium diodes

1 Zener diode

1 Capacity diode

1 Crystal / channel

Weight:

600 gr with batteries