On April 9, 2024 at 14:44, SWFLMike said...
For sure, it just sounds like this isn't amplified (maybe I missed that). The 1 pin would be a 'ground' less than a 'shield'; I'm not sure how the whole common mode rejection thing would work with a conductor that's not a shield...so I probably should have put a heavier emphasis on the 'try' part.
Most Category cable isn't shielded, it's twisted. That twist rejects common mode interference.
The OP mentioned that it would be for a 20 meter RCA lead- Pin 1 is for grounding/lifting ground if needed and pins 2 & 3 carry the signal, on a twisted pair but by original design, with balanced LoZ circuits. There's no need for large conductors but the cable usually has shielding of some kind, as you probably know.
I agree that it's worth a shot, but I'm not confident that it would be noise-free. Some kind of balun/isolation would be a good idea, too.
