This circuit was found in a Dutch documentation from 1970. The circuit makes use of semiconductors that have current equivalents and is indicated by a 0-5 mA milliammeter.
With this name, we find in a documentation by Hugo Gernsback from 1960 this small transmitter for...
This simple receiver, which requires a good antenna and grounding, was found in an Argentine...
This sinusoidal oscillator was found in Radio Electronics in 1989. It uses a 741, but other...