Unusual Radar Detector - This unique anchient design uses a chopper amplifier HOME

The microwave diodes are chopper-gated by a multivibrator so the RF signal level can be detected by an audio frequency amplifier.

Circuit Diagram aka Schematic reverse engineered from circuit board

Here should be the picture of the antenna:

Image description goes here

I do not gaurantee the accuracy or safety of any information herein.
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Do not experiment with or build any of the above circuits.