| Christian |
Why would one be twinning all the cables togheter, for example in the internal wiring of an amp? Why is this good, and what pairs are you supposed to spin togheter?
I've read a little about induction in physics-class, so I thought the best thing to do was to keep wires as far apart from eachother as possible, to lower inductance between them.
What is the overall view of this, and would it make a difference in my amp if I spinned certain(as I said I don't know which) pairs togheter?
Best Regards
/Chris V |
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| tiroth |
| minimize loop size. reduce radiation from differential lines. |
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| MRehorst |
Wires that are "pairs" in the electrical sense (one a source and the other a return for current) should be twisted together to minimize their radiating into other circuits, and to minimize their susceptibility to radiation from other circuits. That means power leads and signal leads (unless you use shielded wire).
Closely coupling the wires by twisting them together increases the capacitance between them, and since the currents are moving in opposite directions, the magnetic fields created tend to cancel each other. Also, if the twisted pair passes near a radiating source, the radiation will tend to hit both wires about equally, with the induced currents cancelling each other, especially at the input to a differential circuit.
Separating wires that are electrical pairs increases the inductance of the loop.
MR |
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