This RF amplifier step has a dynamic range of 140 dB and can amplify signals from 0.5 to 40 MHz. FET is old, but modern equivalents can be used.
This high-powered battery powered flasher was found in General Electric documentation from the...
Suggested by a 90’s Radio Electronics, this circuit automatically activates the recording switch of an...
This simple alarm with latching uses a relay as the main element. The circuit is from a Radio...