Single-crystal OCC Wire - Can It Make a Difference?

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#121
Pano said:
@Jakob2 The key to the files is here.
https://www.diyaudio.com/community/...bout-a-potato-or-even-mud.236248/post-3509865

Did I score all the listeners? Don't remember.

But that's enough - I don't want to hi-jack this thread. Just pointing out a test that I had posted. Read it and make of it what you will.
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I was mistaken then, as I read your post about the new FLAC-files on page 17 and thought in there the correct order was revealed.
But, of course you're right, it doesn't help the OP.
 
#123
Pano said:
I thought they worked simply by sensing an imbalance between neutral and hot. Ground has no actual role. In France it's called a differential, and is on the main power panel. I've had GFI with no ground connected, and they stilll worked properly.

Or are you talking about something else?
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You are both saying the same thing. Since the ground does not go through the toroid with hot and neutral, any current that does not return through the neutral will be sensed.
 
#125
PRR said:
That's the original function, since around 1972 (when they got smart enough to not need an Earth reference).

Some years ago the problem of local E/N shorts diverting current was attacked by even smarter brains. The hallmark may be two doughnuts inside. The one I busted open a few years ago had that, and did not like being too close to the fusebox (to the main E/N jumper). Here is a TI paper.

https://www.ti.com/lit/ds/symlink/afe3010.pdf
"...In addition to a ground fault leakage detection, the AFE3010 can detect a grounded neutral condition which can also lead to a harmful shock from a connected appliance."
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What an interesting circuit, thank you for the link. I never knew about this. And your observation that proximity to load panel causes trips looks totally spot on and logical. The 200 turn toroid pulses hot and neutral together , and if a ground path is there to complete the secondary, the 1000 to 1 picks it up.
I imagine it might be sensitive to line filters also, as they can by design return some current to ground. I had a test rack with a few instruments onboard, and the sum of the line filter currents was tripping a line cord GFI. Turned out the GFI was tripping at 3 mA.


John
 
#127
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#128
heyitsmedusty said:
Nice! I love Amir at ASR. I feel like he provides a uniquely valuable service to the audio community on the objective measurement side of things. There’s so much nonsense in the audio world, and he does a great job exposing it.
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He pretty much has a pretty clear agenda and in another place there just was a discussion about spotting the mistakes in his measurement setups and how they show that he doesn't know how to use his gear. He's just another type of snakeoil monger.
 
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#132
Markw4 said:
Please see previous post: https://www.diyaudio.com/community/...cing-true-occ-copper-wire.383820/post-6964150 ...Post#73

EDIT: Also of possible interest, findings by Hans Polak in a zip cord speaker cable thread: https://www.diyaudio.com/community/threads/zip-cord-for-speaker-test.371099/post-6686399 ...and continuing along from there.

Comment by jneutron in the same thread: https://www.diyaudio.com/community/threads/zip-cord-for-speaker-test.371099/post-6661806
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RLC sets impedance, which is NOT a simple value at audio frequencies where R often dominates jwL
Dielectric absorbtion is insignificant when you work out the stored energy vs the load energy.
I did once work out the energy storage of the mechaanical distortion of the dielectric from the motor effect of the two conductors and again its tiny
 
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#134
davidsrsb said:
RLC sets impedance, which is NOT a simple value at audio frequencies where R often dominates jwL
Dielectric absorbtion is insignificant when you work out the stored energy vs the load energy.
I did once work out the energy storage of the mechaanical distortion of the dielectric from the motor effect of the two conductors and again its tiny
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All true from a physical perpsective. However, being judged as insignificant and or tiny is not the same thing as being inaudible under all conditions.
 
#135
Ultima Thule said:
Wut? I thought Amir have done commendable job with all the measurements, making mistakes is a humane thing, or did I miss something?
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His site is a business endeavor. Mistakes: look for example at that review https://www.audiosciencereview.com/...fire-cinema-grand-review-5-channel-amp.31078/
Modern Equipment doesn't have 60Hz noise. The 60Hz noise + associated harmonics point to common mode noise. The Audio Prescision 2 has floating differential inputs but earth linked grounds. The noise is not caused by the DUT but by the test setup.
The weird "SINAD" that doesn't doesn't correlate with any standardised testing confuses matters.
Sometimes (when it fits the narrative that makes the patreons happy?) power amplifiers are measured with loads different from the loads given in the manufacturers data sheets (say 8R at 1% THD) and then there's complaints, that the power output measured (with a random load and at 0.005% THD+N) is not was is stated.
 
#139
Pano said:
Explain, please.
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If it's on the internet, it must be true right? If somebody claims to make some measurement, it must be true right? One should question snake oil the same way one should question when someone else has claimed he/she has done some particular measurement.

I see some so called "objectivists" are too ready to believe and just are as guilty as those who believe in "subjectivism".
 
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