This is a circuit suggested by Linear Technology in a 1980s documentation. The integrated circuit is from the era. Observe the input and output voltage.
This simple MW radio does not need an external antenna to pick up local stations. It was found in a...
This metal detector circuit uses an AM radio as an indicator. The radio is placed off-station and tuned...
This simple expandable circuit was obtained from a Popular Electronics from the 80's. The supply...