The Passive Aircraft Receiver is basically an amplified “crystal radio” designed to receive nearby AM aircraft transmissions. The “passive” design uses no oscillators or other RF circuitry capable of ...
I’ve been told all my life about old-timey Army/Navy surplus stores where you could buy buckets of FT-243 crystals, radio gear, gas masks, and even a Jeep boxed-up in a big wooden crate. Sadly this is ...
Marked: "Tuner Air / R.A.F. Type 10 / No. A/621 / General Electric Co., U.S.A. / N.P. 18119", and "Control / NP 17987-E / 17987-F". World War I era military unit, a two section receiver consisting of ...
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