Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics.

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TSK TSK John Curl....perhaps you should carefully read the questions

Posted by jneutron (A) on June 8, 2003 at 15:11:20

In Reply to: Re: John, you were sucker-punched, then piled on, by the Usual Suspects. posted by john curl on June 8, 2003 at 08:52:26:

""I am being 'heckled' by Jneutron by a series of 'sophomoric' questions that potentially have little or nothing to do with my test procedure""JC

The effects I speak of, is the interaction between electron transport, and heat transport..
Nickel/copper interfaces produce 21 uVolts for every degreee C rise.
When a current is passed through the same junction, the transport electrons crossing that junction will cause heat flow..Reverse the current, reverse the heat flow..
The relation between the two is not a 100% efficient process...And relates to the valence/conduction bands of the metal..

To assume that process is totally reversible, with 100% energy extraction and recovery, would be inconsistent with all known processes..

How many times am I going to have to say I'm not talking about DC???

You are correct that it is sophomoric.

I learned of Carnot cycles in sophmore year, under Kestin..

I learned of thermoelectric conversion in sophmore year under JJ Loferski.

And, by sophomore year, I learned that it is very important to read a question slowly, and understand what is being said, and what is being asked..You can continue to rant about "sophomoric" questions, and continue to talk about how my question is nitpicking, or heckling.. I have been told by several that that is how you deflect questions you are unable to understand..And, you have not demonstrated that those observations of your behavior are inaccurate...

Now, perhaps I should go over the questions in detail????READ THE WHOLE QUESTION FIRST...

""What I'm thinking of is this... Have you tried to correlate the types of metals used in the IC's you test to the amplitude of the "distortion".
What materials are used for your input and output jacks of your test equipment..""JE

Now..you claim a non linear interaction that resides wholly within your cables..What could it be???Lets see..

Materials?? Geometry??? Or Magic?

Let's cover geometry...

Coaxial? twisted pair.. Are you claiming coaxial is causing this distortion?

What about materials? Are you claiming it's the dielectric? the plating, the bulk conductor??

If you see differences in cables, what next??Do you simply correlate performance to NAME BRAND?? As in this manufacturer is good, this one bad?? Or color??

Or, do you go one step further, and say "what is different in construction or materials that would cause this..
Or, are you happy to just pretend it's magic??

An effect which converts electron flow to heat flow, is already known to exist..Is it possible for that effect to be producing the distortion you report?? The -120dB levels you report are consistent with the levels of this thermoelectric effect.

It would be "sophomoric" for you to ignore it...It IS "sophomoric" for you to not have attempted correlation between cable construction and materials vs. cable measurements...That would have been step two for any competent engineer or scientist..

Now, for the next question...

""Does your equipment reside in a room that has tight temperature control, or does it wildly fluctuate (like my condo)?""JE

I have central air..The air temperature in my condo will fluctuate 3 to 5 degrees C as a result of the constant cycling..For metal film resistors, that would represent a 150 ppm minimum resistance change, up to a maximum of 500 ppm, based on specs alone..

-120dB is 1 ppm...The summation/cancelation circuit I need to eliminate the fundamental to 1ppm is not possible if I cannot keep the resistor ratios to that tolerance..So, for my environment, I could not possibly null out the fundamental and have it not drift..

And I wonder how your equipment would handle that type of thermal drift, given that you have stated the unit indeed uses metal films..

Now, for the question you REALLY SHOULD HAVE PAID ATTENTION TO...

""I'm wondering if Seebeck/Peltier effects are capable of consuming signal energy, and if so, causing a sine squared loss component..""JE

Notice that I have asked how Seebeck/Peltier effects may affect signals, with a non linear response..Not how DC signals may result, but HARMONICS of the test signal..

So, as ALL AT THIS SITE CAN SEE, MY QUESTIONS WERE RELEVANT TO THE TOPIC AT HAND.

You have expressed a "desire" for information exchange on this forum, but your response to my question is entirely against what you "supposedly want".

You have responded in an entirely unprofessional, uneducated, unwarranted fashion, and by reading all the way down to here, you have found that you have indeed provided all who read here a very good example of what is required to QUASH any desire for intellectual discourse, because you slammed me for easily understood technical questions.

I've said it before, John Curl...You have to read the posts completely, slowly, and understand what is being asked...

Your completely inappropriate response to my questions are consistent with your previous actions here..

After a few more years of you acting this way, I may begin to think you really don't want to discuss anything..

TTFN, John

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