Dual Diversity Receiving Terminal RA.133

This dual unit is to receive broadcast transmissions to rebrodcast by local transmitter or wire relays networks.
Two RA-117 receivers are incorporated in this unit.
Frequency range from 1 to 30 Mc/s or 2 to 24 Mc/s with RF pre-selection. With pre-selection an interfering signal 5 per cent off tune is attenuated about 100 dB.
Upper or lower side band may be selected, and in d.s.b. the sideband with less interference can be used. 
The RA-117 receivers can be separately tuned or work in a master-slave relationship.

Here you find 113 models, 62 with images and 18 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Racal Engineering / Instruments / Electronics Ltd., Bracknell