WWII Radio Altimeter, BC-788-C

 I wasn't sure whether to call it a "Radio" or "Radar" altimeter. In WW2 radar, could have transmission frequencies below 30MHz, but nowadays radar is confined to the microwave bands. This set probably uses something between 100MHz and 300MHz?

waiting for better pictures...

This set uses a 6J6 transmitter and a similar valve for receive, each in a tuned lines configuration

The set used a DC input which powered the valve heaters and drove a rotary converter for its HT and connected to a small circular display unit which gave the aircraft's height.


Interior view showing typical high standard US construction

Alas, aluminium corrodes easily... I should consider cleaning it up maybe?

I wonder if it could be made to work??

Return to Reception