This is a transmitter-receiver used in airplanes like Lancaster etc. It is a four channel unit. For the receiver, as well as the transmitter, four crystals are used.
It is remote controlled by a switch box. On the picture a replica controll box is used. But the whole unit is working. Supply voltage is 12 volts, which indicates it is an earlier one.
Transmitter receiver TR 1196 a
Left the connection for the oxygenmask earphones and microphone. In the front the crystal types. At the right the replica remote control box, for choosing one of the four channels and controlling the transmitter.
Inside the unit.
Left receiverpart and right the transmitter part. See also there the HF coils for matching the energy to the earial.
At the right front the alternator power supply.
In front a good view on the crystal board of the transmitter.
In front the earial- and ground connection and the type plate. Also the Air Ministry mark. The white earia is a modification chart.
Left the transmitter with HF earial coils, for each channel one coil. In the mid the four tuning knobs for pre tuning the HF stages of the receiver for each channel.
An overview of the chassis.
A side view.
A nice paper layout picture inside of the housing. It showes the components layout of the transmitterpart for service.