In the article How To Wire an Audio Amplifier by Andrew Russell, the author advises minimizing the separation of single ended interconnects to minimize loop area that can be affected by magnetic fields. Carrying this to its logical conclusion, would not a single cable with four conductors provide the optimal loop area? I've never seen a single-ended cabled designed in this way, besides phono cables with a 5-pin DIN connector on one end. Why not expand the concept to an entire system?
Many cables are made with multiple foil shielded twisted pairs. Without the foil shielding for each pair,
crosstalk could occur.
https://catalog.belden.com/techdata/EN/8774_techdata.pdf
Some stereo cables are made with two shielded cables attached together throughout their length.
Many turntable and tone arm cables are made in this way.
crosstalk could occur.
https://catalog.belden.com/techdata/EN/8774_techdata.pdf
Some stereo cables are made with two shielded cables attached together throughout their length.
Many turntable and tone arm cables are made in this way.
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So you need a foil shield around each pair. But the +/- wires do not need to be separately shielded from each other. So A Cat5 style cable would be susceptible to crosstalk?
And a design like this would be no good for two signal pairs because the pairs aren’t twisted or shielded https://www.soniccraft.com/images/Neotech_NEI-3001_Mk_III-960.jpg
This is a known problem with Cat5 and has an interesting solution: Individual twist lengths
https://en.wikipedia.org/wiki/Category_5_cable#Individual_twist_lengths
So each colored pair would carry the same signal, therefore not requiring twisting? Or because the built-in noise cancelation of balanced connections negates the need for the twist?
Before your edit you mentioned the spacing of the pairs; how far apart would two wires need to be to effectively eliminate crosstalk?
Thank very much for your comments here 🙂
They don't discuss the theory behind the design of that cable.
Crosstalk between twisted pairs of a would depend on the details of construction,
like the twist pitch, dia of conductor and insulation, mean distance between centers, etc.
Crosstalk between twisted pairs of a would depend on the details of construction,
like the twist pitch, dia of conductor and insulation, mean distance between centers, etc.
The loop in question consists of the ground connections in the mains cables of each item of your equipment, the mains earth between the mains sockets they are connected to and the audio cables between your items of equipment. Changing the form of the audio connections is going to make very little difference to the loop area.
Cheers
Ian
Cheers
Ian