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R.A.F. Henlow Signals Museum Exhibits for disposal

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Transmitter_coils^for_SWB=0347.jpg Transmitter_coil_for_Marconi_500W=0255.jpg

Transmitter_Marconi_500W=0254.jpg Transmitter_Part_of_TR1143=0041.jpg
Transmitter
coils
for SWB		Transmitter
coil for Marconi 500W		Transmitter
Emergency
Type T-74A		Transmitter
Marconi 500W		Transmitter
Part of TR1143

Emergency Transmitter
Type T-74A/CRT-3(SCR-578)

This unit, known as the 'Gibson Girl', was used in a rubber dinghy to transmit SOS messages on the international
Distress Frequency of 500kc/s. Its aerial wire was hoisted aloft by kite or balloon.

It sent Modulated CW (Morse) transmissions, or a signalling lamp could be keyed either manually or automatically.


Power was supplied by a hand-cranked dual voltage (28V/330V) generator.

Transmitter<br>Emergency<br>Type T-74A

Transmitter Emergency Type T-74A (Photograph Number 0329)

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