The two circuits shown show how to obtain an SSB / CW control for receiving this signal top at a common receiver. The circuits were found in an old American manual from the 80's.
This sensitive circuit can be designed with FETs such as BF245 and MPF102. The sensor is a silicon...
The presented circuit uses a symmetrical power source to supply an amplifier with the LM139 or...
Using the CMOS IC 4046 we found this VCO in the November 1984 Radio Electronics magazine. The...