This oscillator with emitter follower was found in an American documentation from the 80's. The circuit generates 100 MHz signals and the transistors admit modern equivalents.
This circuit is from 1982 documentation and has some interesting uses, despite its extreme...
This battery circuit provides a charging current of 500 mA depending on the solar panel. The...
This circuit cuts the audio spikes. It was found in an English publication from the 1980s....