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Interconnect BS vs Science |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Only £57.75... Great for electronic design engineers - after reading it you will know how to spot dodgy cables. Here's a randomly selected page showing some of the types of interference. Unfortunately, record players / turntables will never comply and that's why there are no enforceable standards for them. But there are enforceable standards for the electronics which I have to follow. It is however very difficult to comply fully because the downright silly way turntables have not progressed toward any EMC, and so it is a case of trying to marry up electro-magnetic incompatibility with the electro-magnetic compatibility I must follow. Now, I do that and at the same time try and increase the musical performance, and that also depends on correct shielding, which the above book clearly explains. Unfortunately, single sided signals of the type used in playing records do not lend themselves to the EMC techniques required by law, but other than those unsurmountable difficulties our products meet with EMC regulations (most having been tested by an accredited EMC test lab, paid for by a distributor, and hence owned by them). The customer is kept in the dark over such things by the wine tasting press, because, I guess, it would not be good for advertising business. I will add, that these things would have been of interest to hi-fi enthusiasts years ago, before the BS settled in. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Now, the chap in the picture on the book cover was used by the ASA as an independent expert in a case against a cable manufacturer's UK distributor.
But when it was my turn to be attacked by the ASA, I started quoting chapter and verse from that independent witnesses book, and verbally accused the ASA of hypocrisy. The explanation for the Lautus USB cable is in that book, but I was expected to produce measurements taken by myself rather than state the theory that the scientific world states is proof. You can't argue with a reprobate mind. At the same time, large corporations that have the legal muscle, ARE getting away with FAKE descriptions which state their cables are shielded - that they contain a shield - but hide the fact that it isn't properly connected electrically. Some of the wriggle-out words used are laughable from the engineer's perspective, but look plausible to the non-technical consumer. It helps if the cable manufacturer has a large following, even if that manufacturer got its position by cheating.
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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As part of my upgrades on my SL1200 (The last One I hope), I have made a phono cable based on image 1. The cartridge tags will be wired directly to the RCA sockets I will be fitting, and the phono cable will connect between the TT and phono amp. I am currently using the cable between my phono stage and pre-amp, and to be honest it sounded a bit flat at first. A day later it sounds better. What has changed, the cable or my brain? How can a small signal change the way a cable affects the sound? Is there a scientific argument that backs up cable burn in?
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Kevin
European loan coordinator, based near Toulouse, France. |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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All I know is the dielectric will have been subjected to dielectric strength testing using a 3kV "flash" test. Then re-reeled onto drums containing a particular length. You make a cable and it is then first used, and if left in position passing nothing, which is in reality, noise (if the equipment is left on), and then a day later it sounds different. So, what is the scientific difference? As I've mentioned before, the "flash" test is getting a bit closer to HVDC than signal, and grid engineers know of a thing called space charge. It is known to cause acceptable damage to the dielectric, but if a HVDC cable burns out, it is known it is at the point of that acceptable damage. HVDC cables are hefty, but CT100 coax is tiny by comparison. Could it be "harmed" in a similar way? The "flash" testing is required by law. Now, as I don't want to be ridiculed for making suff up, so I need to refer you to this page: And then you can understand clearing voltages in a dielectric, which is a posh name for insulation in proximity with conductors. As for the noise signal being sufficient to be able to clear the fault, I have no evidence one way or another, but if it did, I'm sure it would take a heck of a long time than the very short time required by a self healing capacitor? After all, a cable is a capacitor, isn't it?
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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You were given a brain at birth that is equipped to understand great things using powers of observation. That's where the physics we know so far came from - observation - using the senses connected to the human brain. Everything mankind knows in fact. Such that it can design a radio telescope and iron out every fault and launch it from a rocket to its position one million miles away, to a particular position in space, that is known by observation spanning many years, to be the Goldilocks spot. What's more, it works!!! So, observe things and test all things, and chuck out anything proven to be marketing BS. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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CageyH
Senior Member Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1678 |
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My point is that the brain is able to adjust.
A good example of this is when you change your prescription for glasses. It may seem strange at first, but after a few hours/days/weeks, you get used to it. Is it the same with a cable?
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Kevin
European loan coordinator, based near Toulouse, France. |
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Graham Slee
Admin Group Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16298 |
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Obviously. However, by selecting reference points where mood doesn't come into it, we can then hear a difference if there is any. A bit like calibrating test gear. |
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That none should be able to buy or sell without a smartphone and the knowledge in how to use apps
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