This multi-wire cable continuity tester is indispensable for electrical ... 1. Fig. 2 shows the circuit diagram of the multiwire continuity tester. The circuit is built around the CD4047 (IC1), the ...

So far I got the best result by connecting to the vcr mechanism chassis rather than the test point ground and putting a 0.1 uf film capacitor between the env wire and wire for capturing. May still ...