Found in old American documentation, this receiver transmits signals via the power grid. We can use it on links or remote control. The components admit equivalents.
This low power circuit can be powered with voltages from 1.8 V. We find it in a 80s Hands On...
This simple unijunction and bipolar generator appeared in Radio Electronics magazine in September 1865....
This circuit was obtained from an old American documentation having a limited adjustment range....