C
Colin Bigam
- Jan 1, 1970
- 0
Hey all;
What started as a thread over on rec.audio.tech got me wondering about
how shielding works in different configurations.
Basically, in an unbalanced connection (remember, the original discussion
came from consumer audio), you typically see the following:
1) single shielded conductor (not usually coax, but could be)
2) unshielded twisted pair
or...
3) shielded twisted pair, with the shield connected at (only) one end
of the ground return
Now the question is, how do all of thse work, and how WELL do they
work?
For example, if shielded pairs work by inducing the same (stray) voltage
equally in both of the (opposite) conductors and thus cancelling it out,
then can shielding them accomplish anything at all?
Another ponderable: Why tie the shield to the conductor at all?
Hope someone can answer these for me. My curiosity is burning. BURNING,
I tell you!
Thanks,
Colin
What started as a thread over on rec.audio.tech got me wondering about
how shielding works in different configurations.
Basically, in an unbalanced connection (remember, the original discussion
came from consumer audio), you typically see the following:
1) single shielded conductor (not usually coax, but could be)
2) unshielded twisted pair
or...
3) shielded twisted pair, with the shield connected at (only) one end
of the ground return
Now the question is, how do all of thse work, and how WELL do they
work?
For example, if shielded pairs work by inducing the same (stray) voltage
equally in both of the (opposite) conductors and thus cancelling it out,
then can shielding them accomplish anything at all?
Another ponderable: Why tie the shield to the conductor at all?
Hope someone can answer these for me. My curiosity is burning. BURNING,
I tell you!
Thanks,
Colin