Although it uses a dual-channel FET, which is hard to find today, this circuit was released in a Radio Electronics issue in April 1986. It serves as a signal booster for a wide range of frequencies.
This circuit is from a 1975 publication. The components are from the time, and modern equivalents can be...
This battery-powered emergency light circuit was published in an April 1962 Radio Electronics...
This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today....