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Old 18th August 2012, 08:32 AM   #1271
marce is online now marce  United Kingdom
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AC Signal transmission through cables is quite well understood, my earlier (simplified) posts were a reference to it, it is the electromagnetic wave that dose the travelling the electons jiggle in its presence (a very very simple explanation, physicists). It is TEM wave propagation. As stated quite often here it is physics.
Thanks for the links, its good to laugh, there is not enough humour in the world as it is.

Last edited by marce; 18th August 2012 at 08:35 AM.
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Old 18th August 2012, 09:51 AM   #1272
tvrgeek is offline tvrgeek  United States
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In the audio chain, there are lots of small distortions that add up. Granted.
Now which to work on? The 99% problem, or one of the .00000000001% problems?

I am an engineer, so you can bet I work on the 99% problem first.
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Old 18th August 2012, 01:43 PM   #1273
DF96 is offline DF96  England
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Yes, thanks for the humour. Why is it that audio widgets now always have to have some vague connection with military technology? Maybe the link is that the military seem willing to spend eye-watering amounts of money, on the assurance from others (e.g. vendors) that this will be money well spent? Soldiers and defence civil servants are often rather non-technical, so can be easy prey.

As an example of military 'technology', many different countries with insurgency problems (including Iraq) bought expensive 'bomb detectors' from a UK company. They are supposed to detect nearby explosives, and were used at checkpoints etc. The device appears to be little more than a plastic box containing a circuit board with a couple of short telescopic antennas connected. An engineer inspected this for a TV news programme, and concluded (as expected) that the device could not possibly work. The designer has, a few years later, been charged with fraud. I am not saying that all military technology is fraudulent, far from it, but I am saying that you can't use 'military' as a guarantee that the technology actually works because clearly they haven't a clue how to test things.

Last edited by DF96; 18th August 2012 at 01:50 PM. Reason: add example
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Old 18th August 2012, 01:44 PM   #1274
RJM1 is offline RJM1  United States
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I think that this is a good example of electron flow in a cable.
3D Newton's Cradle Animation - YouTube

"and they all rolled over and one fell out"
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Old 18th August 2012, 02:22 PM   #1275
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The RAF guy . I was annoyed he was being used . I didn't have time to study the methodology as I was ushered out for asking difficult questions . I did feel it was complete nonsense . Time will tell if the pun can be forgiven ? DF I wished you had been there .

As far as I could tell the signal was re-digitized and the error measured .

I asked Tim de Paravacini about it . He said approximately , been there , done that and it doesn't work.
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Old 23rd August 2012, 04:39 PM   #1276
JoeDJ is offline JoeDJ  United States
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Quote:
Originally Posted by Tony View Post
preconditioning or pre-heating is the correct term, the FTC mandated a 1hour at 1/3 full power preconditioning or pre-heating of claimed power spec before testing is done on the amplifier......

burning-in is very much a part of ic manufacturing process...and i know for a fact that AMD do a 100% testing of all their parts before these ic's are tested, marked, packed and shipped to costumers.....
I was speakeng to the psychology behind it, not the science.

A tiny bit of misinterpreted knowlege can be a "dangerous" thing when dealing with the general public no matter what the subject may be .
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Old 24th August 2012, 08:39 AM   #1277
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Quote:
Originally Posted by JoeDJ View Post
I was speaking to the psychology behind it, not the science.

A tiny bit of misinterpreted knowledge can be a "dangerous" thing when dealing with the general public no matter what the subject may be .
I think this is where advertising men write the texts ? I suspect the " burn in " is only a reliability test . The words perhaps convey the true meaning to the engineer and something romantic to others . My guess is a hang over from the old days ?

The number of times I have written a simple and honest text only to find it translated into hype .

One thing I would say about cables , be gentle with them especially if solid core . Solid core kinks .
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Old 31st August 2012, 06:52 AM   #1278
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[QUOTE=nigel pearson;3130567]Pymble Hi-Fi - Nordost Cable Burning

I note that according to the literature the Vidar "neutralizes spurious charges that build up around the cables and the insulation."

I have just invented a unit for those of us forced to listen to such nonsense.

I have christened it the "Vidal"

Much like the old Zerostat, simply point it at whatever snake-oil salesman is making the pitch and it "neutralizes spurious claims (static) that build up around events where boutique manufacturers, audiophools, and audio reviewers are gathered.
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I have yet to see any problem, however complicated, which, when you looked at it in the right way, did not become still more complicated. (Poul Anderson)
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Old 31st August 2012, 11:04 AM   #1279
marce is online now marce  United Kingdom
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lol
One of my favorites, the best bit being "do not reverse your cables" or you will have to burn them in again, obviously havn't heard of the A.C. nature of the signal!!!!

Cable burn in & Fine Tuning | Atlas Cables

Having fun though,looking around the internet at all the nutty things they try and sell "audiophiles".
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Old 31st August 2012, 11:16 AM   #1280
DF96 is offline DF96  England
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It is worse than that. If cable-burning means anything (which I doubt) then you must not move them at all without re-burning. No hoovering behind the speakers!
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