This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...
This circuit provides an output voltage with approximately twice the input using two power...
This transmitter for the 40 meter or 7 MHz band was found in a magazine 73 for radio amateurs of...