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:
https://drive.google.com/drive/folders/1bXbmbsXSajq51i3YMTP31BAc2OODJGaI?usp=sharing
Thanks for watching and subscribing to my channel on vintage radio repair.