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 experimental good sensibility radio was obtained from a 1968 magazine. The magazine no longer...
This simple musical instrument was obtained from a 1967 magazine. If the original transistors are...
This circuit triggers a relay when the phone rings. An application is like remote doorbell. The circuit...