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 circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...
Pulses in sequence can be generated from a clock input using the circuit shown bellow. Outputs A,...
This transmitter for the 7 MHz range, as we can assume by the number of turns of the coil, since the...