This circuit was obtained from Linear Technology documentation from the 80's. Powered by 5 V it can be used as a shield. The components are from the era.
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...