This receiver circuit was found in a Hands On Electronics from the 90s. The circuit uses a PLL 561B that is not a common component today.
This circuit comes from an English publication of 1976, consisting of an experimental touch key....
With a mains-rated transformer and 1:1 winding this benchtop circuit was found in the January 1995...
This power source was found in a 1969’ Electronics World. The version is too sophisticated by the current it...