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.
-- We find this configuration very simple in a previous American publication of 1973. The...
This JFET amplifier was found in documentation from 1958. The circuit has voltage gain of 4 and 10...
A square signal of about 1 kHz is produced by this astable multivibrator. Frequency is determined...