So where now is Kiriakos' adjustment capacitor theory? Maybe your BNC plugs are microphonic? 😎perfeu said:
perfeu: Where did you conenct that coax that you hit? Couldn't understand what you actually did. Scope cable is also a coax cable, just more flexible.
My experiencewas that some interconnects did offer better frequency response than others. This was audible on both the Quad ESL-63 and Yamaha NS-1000M, but not on any others I've had. This was not do to any magical properties, but only as the result of the conducting medium's own reactive and resistive components when inserted between a source and load impedance. It's not a matter of gear resolution, it could be found even on lower end electronics, provided the impedance properties were there to allow it. I found speaker cables to be pretty negligible, however. Admittedly, I haven't delved far into speaker cable listening because I was satisfied with what I had already.
I have wired my whole system with cables from Blue Jeans Cables. Not because of any supposed audible differences, but because they sell well made cables, using wire from Belden and other quality manufacturers, at a good price. Very satisfied with their products. Buy well made ICs made with good parts and then forget about them.
I started using Mogami W2534 with Cardas GRCM6's (they will squeeze in) or any of the larger Cardas RCA's.
About $1 a foot for the wire and between $10 and $15 for the ends.
I'm slowly weeding out all other cable.
About $1 a foot for the wire and between $10 and $15 for the ends.
I'm slowly weeding out all other cable.
Low noise translates to high shielding as protection against electrical intereference from near by sources.
There is no preamplifier in this planet who senses the changes in capacitance of a cable as one Oscilloscope does.
The dead cable horse will never be burried. I was looking at a 9000 dollar (yes three zeros) power cable the other day and it made me speechless 😱. I for one do not and will never buy into most of the cable hype. Quality metals and solid connections are mostly whats important here and that can be achieved with much much less in most cases.
I would recommend those $9000 cables for your electric kettle as well as the hi-fi. You get enhanced 'floral notes' in your cup of tea. 😀
so while over their anticipated lifetime, you'll save only .000001% of their cost on reduced electricity cost (OK, make up your own fictitious number - it won't matter 😉 ) , everything will taste better - especially your flavoured Nescafe /coffeemate
Isn't there an insanely expensive coffee-bean that's passed through the digestive system of a civet? You'll need fancy materials in your kettle-lead to appreciate the unique texture. 😀
Only if it does not contain any magnetic material because of the cow magnets.
Cow magnet - Wikipedia, the free encyclopedia
I haven't read all six pages of this trainwreck, as I would like to make a serious suggestion.
Instrument cable. It's coaxial, it's meant for line-level signals, it's cheap, it's easy to find, it's easy to terminate. I like Canare F-09 connectors, they come with a strain relief, are not bulky like many DIY connectors, they are easy on RCA jacks many high end connectors like to stress jacks with weight and a tight grip. All of my RCAs are constructed this way, coaxial line is nearly dead silent in my experience and the piece of mind of having a quality cable that will last is all I need. YMMV.
Instrument cable. It's coaxial, it's meant for line-level signals, it's cheap, it's easy to find, it's easy to terminate. I like Canare F-09 connectors, they come with a strain relief, are not bulky like many DIY connectors, they are easy on RCA jacks many high end connectors like to stress jacks with weight and a tight grip. All of my RCAs are constructed this way, coaxial line is nearly dead silent in my experience and the piece of mind of having a quality cable that will last is all I need. YMMV.
I try not to read cable threads these days, as they inevitably all end up in chaos and muck slinging...... to no avail. In general terms, it is always those who believe against those who "probably" understand - with the odd exception in both camps......
I've spent my whole professional life ( 38+ yrs) in geophysical and sounding rocket instrumentation, ELL optical detectors and stuff like that, some at signal levels that would be totally messed up by most of the strange cable effects described here. Still I have yet to see anything but ordinary good quality cable, - for a 1-3 conductor shielded cable, probably at 10$/meter at the very most. Some of these instruments have been concipated and designed by scientists and engineers that are absolutely hysterical about signal quality.
Obviously there is bad and good quality cable, high capacitance mostly not wanted, but the rest is just mumbo jumbo.....
Anyone remember the naked conductor cables in the deuterium filled hoses...
I've spent my whole professional life ( 38+ yrs) in geophysical and sounding rocket instrumentation, ELL optical detectors and stuff like that, some at signal levels that would be totally messed up by most of the strange cable effects described here. Still I have yet to see anything but ordinary good quality cable, - for a 1-3 conductor shielded cable, probably at 10$/meter at the very most. Some of these instruments have been concipated and designed by scientists and engineers that are absolutely hysterical about signal quality.
Obviously there is bad and good quality cable, high capacitance mostly not wanted, but the rest is just mumbo jumbo.....
Anyone remember the naked conductor cables in the deuterium filled hoses...
Then you had an antenna. Did you hit the cable in the middle? Maybe touched the end? If it was not terminated, then it is a anything can happen measurement.
My father worked with telecommunication devices a lot and they also had to get decent coax cables from germany as the locally available cables were not up for the task. So the cable does matter, but not to cost hundreds and thousands. Only have to be decent quality.
Good shielding is only part of the story. As we keep telling you, low microphony is also an issue. Why are you so adamant that we are wrong?Kiriakos said:
The change in capacitance is negligible. The shift of charge is noticeable. Changing the cable design to reduce triboelectrical effects (while leaving any capacitance change unaffected) seems to stop the handling noises. Can we deduce anything from this?
No. An unterminated coax cable is not an antenna. If he touched the end inner conductor then he becomes an antenna, but he didn't do that; he hit the cable.mrWagner said:
When an event, fully explicable by standard physics/chemistry, is reported why do people who presumably have never come across it before seem so unwilling to accept it at face value?
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I mean if you don't conenct the earth of the scope to anything, it picks up any near signals.
If the coax outer is ungrounded (which it wasn't, if I understand correctly) then you may get weaker tribolectric effects, not stronger. I think we can assume that peufeu knew what he was doing, and stop finding reasons to dismiss an experimental finding which accords with known theory. He took a piece of coax, attached it to a BNC plug and put it on a scope input. He then hit the cable outer.
It wasn't an antenna, as the outer was grounded. He wasn't an antenna, as he didn't touch the end.
It wasn't a microphonic scope probe compensation cap, as there was no probe.
It wasn't a capacitive change, as that would require a DC bias via a high value resistor.
It wasn't an antenna, as the outer was grounded. He wasn't an antenna, as he didn't touch the end.
It wasn't a microphonic scope probe compensation cap, as there was no probe.
It wasn't a capacitive change, as that would require a DC bias via a high value resistor.
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