This circuit uses a photo-SCR or LASCR that is not a common component today. The relay depends on the load, and the power is supplied by the power grid.
This is the project found in a 1981 publication, but it is still viable. It is a simple AM...
August 2017 - Rectron's Schottky Barrier Diodes can now be obtained from Mouser Electronics. The...
We found this AM radio in a 1957 transistor application manual, published by Raytheon. The...