This automotive circuit was found in the September 1992 issue of Radio Electronics magazine. The circuit directly drives a relay that must have a coil resistance greater than 65 ohms.
The two circuits shown show how to obtain an SSB / CW control for receiving this signal top at a...
This variable voltage regulator circuit has a power stage capable of supplying currents up to 1 A....
We find this encoding circuit in an American 1980s amateur radio documentation. The circuit can be...