This circuit was found in a 90s Popular Electronics. The circuit operates in the range determined by L1. The integrated circuit used is uncommon today.
This circuit for signals up to 30 MHz can improve your reception in the medium and short-wave...
This circuit can be used as a shield for transmitting the temperature of a sensor. The circuit is from...
This astable multivibrator follows the traditional configuration for use as a signal injector, found in...