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In Reply to: RE: The Physics of The Battery Ground Tweak posted by Maxamillion on December 12, 2015 at 15:44:53
You wrote, "It seems logical that a chassis ground with more available electrons packed into it's surface might result in more dynamic, punchy sound than a chassis without such extra electrons."
Why?
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Electrons are charge carriers, and the flow of charge is current. Having more charge carriers available to respond to current demands certainly seems like it would help with dynamics, no?
I don't claim to know what the heck is going on with the BGT, but the gospel says that charge "moves" when it is in a circuit. Ok, so the electrons that can flow to the positive side of the circuit from ground can only exactly equal the electrons that can flow FROM the positive side of the circuit TO ground. Somebody's Law of Conservation must say that better. In this simplistic view (I admit), the electrons sitting at ground potential at any point in time would not move (do no good for the sound) unless they were replaced by electrons flowing to ground potential. If indeed they were there in the first place (see the other guy's comment), they would sit there, and ground would have a net negative charge over and above its negative difference from the positive rail. I don't mean to be antagonistic; I learn something from making myself think about it.
Where is the complete circuit when charges move from a Vandegraff generator to a person on an insulated platform?
The other thing to think about are all the "unseen circuits" in any system, the ones that don't appear on the schematics, formed from all the parasitic capacitances and inductances that litter any real system. They can make complete circuits exist where the schematics say they don't, especially when you talk about transient events.
Also not being argumentative, just looking for a discussion.
I do enjoy the discussion, too. Do you perceive that any such "unseen circuits" are at work in the BGT? Anyway, you previously posited a pool of electrons sitting at ground potential as a consequence of their being no circuit with respect to the BGT and the component being affected by the BGT. This is what I responded to. Can you have it both ways? (Typical logical argument says no you can't, but my knowledge base is weak when it comes to electronics and certainly to quantum mechanics.) It seems that if there were an unseen circuit between the BGT and the component, then those electrons would not sit around in excess at ground potential.
I'm trying to stimulate discussion of the various possibilities, not trying to have it both ways. I haven't decided which if any of these I believe.
Is the BGT interacting with/charging hidden parasitic circuits?
Is the BGT a steady state subcircuit that resonates with the AC of the music signal to cause perception of enhanced dynamics?
Does the BGT somehow pump electrons into the ground plane, more than would normally be present, allowing the circuit to react to transients more quickly?
Is there no effect at all and all of us who hear something are suffering from expectation bias?
I made a bunch of the newest versions for the stereo and TV and, on a lark, gave one to a co-worker who plays electric guitar. He plugged the BGT into a parallel input of his amp and, over the space of several days, tried a number of different guitars. His main comments were that it seemed the amp picked up more drive with added detail and that the midrange, always being a little weak, was suddenly filled in. (Like an EQ shaped like a smile is now a flat line.) He even forgot it was plugged in one time and wondered why his axe sounded different. And he likes the change in sound - or at least, I haven't gotten the BGT back after about 2 months!
Now, here's the clinker: the BGT did this on all of his guitars but one and with that one he could not tell any sound difference, with or without. I had built up a pet theory that it was acting on the equipment it was plugged into, but if it shows no difference on one sample, the BGT is not filling in a deficiency of the guitar amp but would seem to be heading upstream to influence either the signal or the guitar producing that sound. And what is it that makes that one guitar immune, so to speak?
Others are free to ponder and suggest ideas; I find the whole thing fascinating, even though I haven't a concrete clue how it works - but it does. On some things.
Interesting. Same thing I hear - fuller mid-bass and more impactful bass.
Now if we can only figure out why...
My favorite physicist Richard Feneyman once said if anybody tells you the understand electricity they are lying. This from the creator of quantum electrodynamics, a theory that has been proved by experiment over and over again
Alan
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