Contactor Unit BC-608-A of RC-96A System Pipsqueak NOS PV-2 Harpoon Thermometers

Thermometers

This particular BC-450 was matched with a system comprising of receivers for frequency ranges of 3-6 MC

botton-mounted handle unlocks when flipped up

whereby upon decent

The small pointer indicates engine RPM around the inner scale up to 50%

Contactor Unit BC-608-A of RC-96A System Pipsqueak NOS PV-2 Harpoon ThermometersHere is an excellent example of the WWII era Contactor Unit BC 608 A, a component of the US Army Air Force's RC 96 A Contactor System intended to work with the the British RAF "Pipsqueak" system. Pipsqueak was a simple radio navigation system used by the British during the early part of World War II. Pipsqueak used an aircraft's voice radio set to periodically send out a 1 kHz tone which was picked up by ground based high frequency direction finding