I was behind the iron curtain until i was 13 years old so now i understand why we got the communist publications.Pif and Hercule were characters of a cartoon printed in the newspaper "L'Humanité" published by the communist party. That had a limited audience at this time (cold war: 20% ) and near no audience today (Berlin wall: 4,3 %).
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And you still think people are fully rational? Well, you could try Jonathan Haidt's The Righteous Mind.
Eventually, with enough input from different experts you should start to grok a new understanding of human brains vs the model you currently seem to have in use.
Surprising how you like to draw firm conclusions from a a few lines of words. I have read the Righteous Mind too. Something interesting about Engineering and Psychology difference is you need to read a lot of books to understand Science and Engineering, while for Psychology some people were just born with the knowledge in his head.
... A cold drawn copper conductor change its tensile strength and conductivity over time while a properly annealed one will exhibit less of a change. I have seen no study with relevant electrical properties measurement on effect of current flow, EM field, thermal cycling, grain size, fatigue, break in procedure or others in wires.
You almost make me wish I didn't skip the mandatory metallurgy class in school. 🙂
No, that does not happen at current densities that insulated wires can support.... And that, apart the phenomena of oxidation that can change its conductivity, the simple fact that an electrical conductor is submitted to a current flow produce a change in its physical structure, witch is proportional to the time it is exposed to this flow ?
It happens when current densities exceed specific thresholds, 10 power 6 0r 7 amps per square cm for copper. 10 million amps /cm^2 is what, 100 kilo amps in an AWG 12 wire. It is a consequence of momentum transfer, the electrons gain sufficient energy to bounce an atom out of the lattice.
It's quite well understood, and certainly does not happen at room temperatures for audio interconnects or speaker runs. I do worry about this for the solder interconnects between superconductors, but I'm running a kilo amp through #16 AWG sized wires
Wiki has a reasonable write up on this.
Jn
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But sometimes, in order to advance the current state of the practice, we have to move beyond the known boundaries. Then maybe we can call it "philosophy", as in PhD. A high school teacher I had once called it "the sum of all sciences".
All you need to know about philosophy:
YouTube
Tubes have a larger outside diameter than wire. Using really thick wire is limited by skin effect. High voltage power lines can run above 1,000 amps. Temperature rise is less of a problem in free air.
HV transmission lines typically have aluminum outer conductors spiraled around a steel cable. The steel supports, the aluminum conducts. When they make the cable, they draw the bundle through a die such that the aluminum wires are pie shaped and the outer surface is more of a cylindrical shape. That reduces external field gradients for higher voltage use.
As to temperature being less of a problem, remember the NE blackout IIRC was caused by overloaded high tension lines that heated up, sagged too much and touched treetops.
Jn
What I recommend is that you stay away from silver cables, unless you are willing to invest in their break-in which may take weeks to years. That has been my experience.
I would be astonished if the change is not measurable.
I wonder why there is little/no data on this from the scientific community. Experiments are typically instrumented until the noise/confounders are at or below what is computed as the minimum possible from the physics of the experiment.
As to temperature being less of a problem, remember the NE blackout IIRC was caused by overloaded high tension lines that heated up, sagged too much and touched treetops.
We had a big customer that wanted us to do a remote sag monitor. They wanted power and data via optical means (for obvious, 750kV, reasons). In talking with them it was apparent that this was a if not the major issue.
You did not use high purity dead soft annealed did you?What I recommend is that you stay away from silver cables, unless you are willing to invest in their break-in which may take weeks to years. ...
What I meant was a change of property of a wire resulting on a perceivable sonic difference in a domestic audio chain should be measurable.I wonder why there is little/no data on this from the scientific community. Experiments are typically instrumented until the noise/confounders are at or below what is computed as the minimum possible from the physics of the experiment.
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I thank the lord that I not share the same version of common sense as you do.Rsvas, I am world famous, I don't need your version of 'common sense'.
The question remains, world famous for what? the virtues of sound fidelity using silver wire and teflon pcb's, why not become more famous, when you explain to the world why that is.
It is, he heard it, haven't you been paying attention 😉 You must have heard the quote from Toole Planet 10 trots out at every opportunity.What I meant was a change of property of a wire resulting on a perceivable sonic difference in a domestic audio chain should be measurable.
Subject to new scientific discoveries concerning the properties and constitution of conductive materials, I am, of course, of the same opinion.No, that does not happen at current densities that insulated wires can support
Anyway, John has mentioned that silver cables produce, on his experience (that I do not question), a "brighter sound".
In everyone's mind, this implies a modification of the response curve with a relative increase in the level of the treble. We (he) know how to measure that. If this proves to be effective, it is advisable, in a second time, to explain the causes.
If it turns out that the measures contradict this impression, we have to look at psycho acoustics. Silver is often considered more brilliant for two reasons,OMHO.
The first is its color, white being considered more "light" than dark red.
The second, that some tweeters whose moving coil was made of silver go higher in frequency than their copper counterparts. This is, of course, because Silver being better conductor, the weight of the moving coil can be lower for the same resistance.
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That could have an undesirable result of placing it squarely as the mundane and lost the aura of mystic. Blame Tolkien and Rowling. 🙂... explain to the world why that is.
You did not use high purity dead soft annealed did you?
What I meant was a change of property of a wire resulting on a perceivable sonic difference in a domestic audio chain should be measurable.
It would be measurable if it existed, there has been no evidence presented that would survive reasonable scrutiny.
A high school teacher I had once called it "the sum of all sciences".
He was wrong about that, IMHO.
Regarding Science, Natural Physical Science is perhaps the term you were looking for (from the Wikipedia article you linked):
"Natural science is concerned with the description, prediction, and understanding of natural phenomena based on empirical evidence from observation and experimentation. It can be divided into two main branches: life science (or biological science) and physical science. "
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...while for Psychology some people were just born with the knowledge in his head.
Not really. Most people mis-read Kahneman, some more so that others. Apparently, some do to an extreme.
Personally speaking, my science and engineering library was far more extensive than for any other subject. The rows of bookcases are long gone, the internet having made paper copies unnecessary.
You need to look for asymmetric current noise properties, standard full wave rectification sensing will return averaging results.It would be measurable if it existed, there has been no evidence presented that would survive reasonable scrutiny.
Dan.
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There is signal frequency dependent velocity behaviour (dispersion, Hawksford) which causes resonance and dynamics behaviour anomalies and PIM.Anyway, John has mentioned that silver cables produce, on his experience (that I do not question), a "brighter sound".
In everyone's mind, this implies a modification of the response curve with a relative increase in the level of the treble. We (he) know how to measure that. If this proves to be effective, it is advisable, in a second time, to explain the causes.
Dan.
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