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 can be controlled by an external signal which allows its use as a shield. The circuit...
This simple SCR alarm circuit was found in an old Poptronics, but can be easily assembled as all...
This circuit was obtained from a 1966 magazine but can be easily assembled using the 2N2646 as a...