In order to receive the now super low power signal, I had to add another amplification stage to the receiver.  The new stage is identical to the first stage.  I’m using a TL081 JFET input op amp, but any decent op amp will do the job (note that a 741 isn’t decent!).  The op amp […]

…..and I can’t decode it anymore!
The signal has moved from being transmitted 60 miles away from me, to being transmitted 360 miles away from me, and my receiver isn’t having any of it.
I’ve tried a few little things to try and improve the sensitivity of the receiver, but so far to no avail.  I also […]