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Author Topic: Microdiodes in copper conductor  (Read 22460 times)

Sahib

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Re: Microdiodes in copper conductor
« Reply #45 on: December 18, 2007, 07:21:24 PM »

If the oxygen is indeed in the form of Cu20 around the copper crystals and theoretically constitutes a semiconductor, then I don't think that there is anything wrong with this idea, as my cousin (in law) refers to it as a proposal. It may well be, but unfortunately the directionality of speaker or even the mains cable is sold on this very idea. What also bothers me is that industry professionals are becoming instrumental in this snake oil business. Otherwise why would you touch that subject in your book and leave it hanging in the air without taking it to a conclusion?

Very recently my 27 years of friendship has ended. Although it appeared to be for a different reason but I know it was because of this cable issue. Unfortunately he has been in snake oil cable business for sometime and had been feeling uncomfortable with my open critisism in our Turkish forum. It became obvious that he was distancing himself from me for sometime and eventually the rope broke. Good job that it wasn't my wife. Imagine the reason for a divorce being the microdiodes in copper.

Cemal



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John Roberts {JR}

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Re: Microdiodes in copper conductor
« Reply #46 on: December 18, 2007, 08:31:33 PM »

Speaker wire nonsense has been debunked by industry professionals for decades. I wrote a column about it in a recording magazine back in the '80s. I was not the first or last to cover that well trodden ground.

Snake oil vendors still sell this stuff because it's very profitable and there is an endless line of fools willing to be separated from their money.

It doesn't speak well for us as population to properly evaluate the important science issues we must deal with regarding climate and energy policy.

JR



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Larrchild

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Re: Microdiodes in copper conductor
« Reply #47 on: December 20, 2007, 02:52:20 AM »

I don't subscribe to skin-effect within the aural passband, and I don't subscribe to this crystal issue due to the swamping shunt resistance.

So what's left?

Just use big wire for low-ohmic paths.

All the science you really need in the speaker wire business.

The grandest non-linearities occur in the transformation from electrical to acoustic, in the speaker.

Why don't these "scientists" solve some of those glaring problems first?!
Must be harder to fake.
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Larry Janus
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bruno putzeys

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Re: Microdiodes in copper conductor
« Reply #48 on: December 20, 2007, 04:03:27 AM »

Larrchild wrote on Thu, 20 December 2007 08:52

Must be harder to fake.

Nails it exactly. I can fake being a "bleever" but they can't fake being a scientist.
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Larrchild

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Re: Microdiodes in copper conductor
« Reply #49 on: December 20, 2007, 09:45:49 AM »

They are "seekers'.

And there is a seeker born, every minute.
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Larry Janus
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John Roberts {JR}

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Re: Microdiodes in copper conductor
« Reply #50 on: December 20, 2007, 12:59:26 PM »

Larrchild wrote on Thu, 20 December 2007 01:52



The grandest non-linearities occur in the transformation from electrical to acoustic, in the speaker.

Why don't these "scientists" solve some of those glaring problems first?!
Must be harder to fake.


I like to look at larger venue sound reinforcement as it's harder to fool thousands of people at the same time.  Laughing

While that technology is pretty slow changing I've seen two recent advancements that look promising. One is the use of DSP to correct for some known problems in horn-manifold systems. Another is a clever configuration where multiple drivers feed into a single horn and play nice together.

Some folks in the know, understand the weak links and are working on it.

Perhaps a little off topic for this forum.

JR
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bruno putzeys

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Re: Microdiodes in copper conductor
« Reply #51 on: December 20, 2007, 01:47:31 PM »

John Roberts  {JR} wrote on Thu, 20 December 2007 18:59

Perhaps a little off topic for this forum.

I daresay this whole thread... Twisted Evil
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Sahib

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Re: Microdiodes in copper conductor
« Reply #52 on: December 20, 2007, 03:58:49 PM »


Say it Bruno, say it. Very Happy

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Larrchild

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Re: Microdiodes in copper conductor
« Reply #53 on: December 20, 2007, 06:52:46 PM »

I'm all for grilling-up sacred cows, and Bruno does them well-done.
But he's right.
This was a total bait-job, Sahib! Very Happy  Very Happy
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Larry Janus
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Andrew H

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Re: Microdiodes in copper conductor
« Reply #54 on: January 09, 2008, 11:20:39 PM »

At this point, does anyone have any comments about stranded vs solid core?

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johnR

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Re: Microdiodes in copper conductor
« Reply #55 on: January 10, 2008, 09:55:34 AM »

Andrew H wrote on Thu, 10 January 2008 04:20

At this point, does anyone have any comments about stranded vs solid core?


If the stranded wire has individually insulated strands (Litz wire), it will have lower resistance at high frequencies due to reduced skin effect. If not, it won't, regardless of what marketing people would have you believe.
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Larrchild

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Re: Microdiodes in copper conductor
« Reply #56 on: January 10, 2008, 10:39:54 AM »

The burning question is: "Does skin effect exist in the audio passband?"

Clearly, it does at RF.
Where does the transition occur?
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Larry Janus
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bruno putzeys

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Re: Microdiodes in copper conductor
« Reply #57 on: January 10, 2008, 10:50:39 AM »

That's like asking at what speed do relativistic effects come into play? Answer: as soon as it's moving. The better question is: when does it become significant? That depends what you consider significant. We launch rockets to Mars without ever bothering about relativity, but GPS satellites' orbits are calculated using relativity because there a couple of inches really matter.

One thing is certain: in speaker cables and at audio frequencies the lumped inductance will outstrip the effect of any skin effect by orders of magnitude.
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Larrchild

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Re: Microdiodes in copper conductor
« Reply #58 on: January 10, 2008, 11:05:31 AM »

Then it sounds like it's down to: Just use Big Wire.
Solid, stranded, no matter. The current is going through the entire cross-section of the conductor.
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Larry Janus
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Tomas Danko

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Re: Microdiodes in copper conductor
« Reply #59 on: January 10, 2008, 11:17:46 AM »

Larrchild wrote on Thu, 10 January 2008 16:05

Then it sounds like it's down to: Just use Big Wire.
Solid, stranded, no matter. The current is going through the entire cross-section of the conductor.


Although strands would be easier to twist and bend, should this be required, I'd wager.
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