2. cables
  3. 158348-11297

A challenge to the "measurement" camp

I’ve watched some of his video and I actually agree on some of what he said,
but he seems too confident on his insistence on measurement. For those
who expound on the merits of blind test and measurement, why not turn
the table upside down?

Why not do a blind test of measurement? That is I will supply all the measurement
you want, can you tell me which is a better product?

For example, if I have a set of cable, and a set of measurement for each
individual cable, can you tell me which is the best cable based on measurement
alone? I will supply all the measurement you want.
After all, that is what you’re after right? Objective result and not subjective
listening test.

Fast forward to 8:15 mark where he keeps ranting about listening test
without measurement.  
https://www.youtube.com/watch?v=katmUM-Xelw

By the way, is he getting paid by Belden?  Because he keeps talking about it
and how well it measures.  I've had some BlueJean cables and they can easily
bettered by some decent cables.  
andy2
andy2 OP
1,573 posts
 
but you could give djones51 whatever it is that she/he is asking for
The finger :-)

Sorry but I couldn't resist. 


roberttdid
534 posts
 
  1. DC resistance can be found at the low frequency point.
  2. AC resistance due to inductance is proportional to frequency.
  3. AC resistance due to capacitance is proportional to 1/frequency
  4. AC resistance due to skin effect is proportional sqrt(frequency)

Absent intentional magnetic materials in the cable, inductance will be highly linear, and for these dielectrics and fields strengths so will capacitance.

djones51, asked for a frequency response of the cable. That means just the cable and the frequency response will give you the AC resistance (impedance) over frequency. If you are doing it properly, you are also providing a phase shift into a given load, so now you have made it even easier to extract L and C from skin-effect.
With an essentially infinite number of data points at reasonable precision as would be expected in any response plot, I have more than enough data to extract the characteristic R, L, C, and the skin effect characteristics. Heck, there is even enough data to create reasonably accurate models of non-linearities in L.

When you said "Nobody on this earth has any clue" what you really meant is that YOU HAD NO CLUE.

he has no clue is nobody on this earth has any clue how to


glupson
7,842 posts
 
andy2,

"The finger :-)

Sorry but I couldn't resist. "
From up there where the fans sit, it seems that djones51 just scored the point.
andy2 OP
1,573 posts
 
^^^by getting you duped.  
glupson
7,842 posts
 
andy2,

" ^^^by getting you duped. "

No, by you lowering the level of decent discussion.
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