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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Update on my ground loop posted by DC STEVE on June 26, 2007 at 18:39:17:
1. Better line regulation: Ground and supply references get more stable. This is hugely important to accuracy. For example much of the so called "digital hash" caused by sharing analog equipment with digital, like a PC as an extreme example, is likely mostly ground bounce from the digital loads causing crosstalk in the analog systems through it's power supply rails.
2. Better load regulation: Power is more readily available to power hungry devices. Peak load demands are more accurately satisfied leading to better load driving capaility. In English....your high power amps won't be nearly so likely clip and thus distort in demanding musical situations if you do it right.
As has been pointed out by previous posters the tradeoff is ground loops are created, but you can do stuff to minimize the effects of this tradeoff which in most cases make it wa worthwhile tradeoff. Flea power systems might be the exception that can better get away with the single outlet approach.
Minimizing impedance between points in the loop keeps loop symptoms down. Why? Because a lower impedance is harder to develop a voltqage across. If no noise voltage can be developed due to ultra low impedance interconnects, then no noise contribution due to this ground loop is then negligible. This is accomplished by using the fatest guage wire possible and guaranteeing top quality connection points.
The other problem with dedicated lines is the noise immunity is not as good. Deal with this problem as follows: When routing the lines remember to keep loop area as small as possible when concerned with nearby fields, but this must be tempered with making sure the inductive coupling between each line is not high meaning they can't be too close to each other either. I think if you can manage to seperate each seperate line by several inches from the others while at the same time routing the whole bunch free of strong electrical disturbances you can achieve the best noise performance this seperate line tradeoff will allow.
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Follow Ups
- The advantage of dedicated lines over single outlet are to reduce AC ckt line losses to each individual load. - Ugly 20:01:25 06/27/07 (0)
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