The circuit was designed for 300mv pk-pk input. Here is the result.
One last shot with 30mv pk-pk showing the RF amp output and the audio output.
I can across this last night and wanted to store it before I lost it. I will have to look up the patent for the rest of the story.
300mv pk-pk input-Clean RF out-Good detected signal with low modulation.
I added a 200 Ohm resistor and 100n cap to decouple the power supply and the signal cleaned up nicely with the 10% modulation. It will probably go crazy at higher modulation levels. An RF choke would be better but that will be a later post.