This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.
This circuit includes the amplifier for the signals, being fully transistorized and using varicap...
We found this amplifier in a publication of 1990, but it can be mounted today with some exchanged...
July 2017 - The new touch switches from Alps SKPS series for surface mounting can now be purchased from...