This circuit was found in a 1965 Radio Shack documentation. The transistors are from that time. The circuit can be implemented with current transistors and lower voltage supply.
This circuit has already been explored in other articles on this site. The high power is due to...
This circuit was obtained in a 1978 magazine, but it can be easily assembled. What the circuit does...
This circuit is from a 1988 documentation, but uses components quite common today. The circuit...