This circuit was developed to find intermittent defects in an electrical control. In the event of a defect, the circuit fires indicating the moment of occurrence.
We found this oscillator in a documentation for radio amateurs from the 1970s. The circuit can use...
Many oscilloscopes have high impedance inputs that make it difficult to observe high frequency signals...
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...