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R.A.F. Henlow Signals Museum Exhibits

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Panel_Type_327=0345.jpg Panel_Type_327=0430.jpg

Power+Unit_for_R1471_(Homemade)=0337.jpg Power+Unit_for_TR1133=0044.jpg
Type 327
Type 327
Pip SqueakPower Unit
for R1471 (Homemade)
Power Unit
for TR1133

Contactor Unit BC-608A.

Pip Squeak This unit was used to control the operation of a transmitter that sent out a signal for 14 seconds in a minute on a specific frequency. The intention was to identify an aircraft as friendly to the ground controller. It pre-dated the IFF MkI system that was developed by 1939.
Pip Squeak

Pip Squeak (Photograph Number 0400)

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