Build this simple, but effective Audio Frequency/Radio Frequency Demodulating Probe that requires no switching between input sources. The Probe feeds an external high gain amplifier w/ 60dB of gain (x1000) to detect those weak R.F. signals.
As-built drawings:
[ Ссылка ]
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![](https://i.ytimg.com/vi/OGrkIC-Mov0/mqdefault.jpg)