This circuit is from a July 1970 Radio Electronics magazine. The sensors are metal probes. The 18 V power source must be isolated from the mains.
This simple circuit tests both monophonic and other two-wire audio cables. The circuit is powered...
This circuit was originally designed to operate with the CB18751E which transmits its signals via...
This configuration has already been found in other manuals, as the LM117 is manufactured by...