Found in documentation from the 1970s, this circuit uses an oscillator and a display to warn of speeding. The circuit applies to cars with contact breaker.
The signal itself captured by the (long) antenna serves to feed this simple experimental circuit....
This voltage level-triggered circuit was found in a 1969 Ferranti English documentation. Modern...
This amplifier makes use of a simple 12 to 30 W source, having been found in the SGS manual of...