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In Reply to: Re: load resistors & shunt components posted by Mart on June 29, 2001 at 00:25:01:
Dear Mart,
I must say that our conversation is quite interesting. I would almost like to do it in person.
Unfortunately, it also seems that either you or me read different things from the other's writing.
This time I will have to be short since I am about to go on a training trip.(For your first comment) Do not get such impression. The way that I attack scientific problems is that I divide them into small parts and analyze them. Then I look at the overall to see if the model stands. My description was only of a part of a cap. Notice that I didn't use absolutes about inductance being only in one part of a cap (as opposed to the rest of it). In simple terms, the signal going through a capacitor is constantly exposed to the tendency of jumping across the dielectric (in electrostatic form) and the tendency to flow through the foil (which will be opposed by inductance and resistance). Then, if it jumps across the dielectric (again due to electrostatic) it will again have the tendency to flow through the foil (which will also be opposed by inductance and resistance). The degree of each tendency depends of the design of the capacitor. This would work even if you were to use a chunk of twisted pair wire as a capacitor.
Dear Mart, I get the impression that you prefer to pick on little corners of my arguments while not paying attention to the fact that I do not use absolutes. I do this precisely to prevent being misunderstood. It has obviously not worked. But be assured that I am not one to make "laws" out of everything that I say. It wouldn't be correct.
This impression is brought on by your second comment. Here I feel that you are talking about old style low voltage Caps being used for high voltage applications (like for tubes). I must admit that this is a topic that I didn't have to battle with since I have no problem sourcing high voltage Caps. This means that I do not have to end up using caps in series-pairs for a much larger voltage-application. Cat7, in case that you were not aware, is not used for high voltage applications (by a very long shut). So, I am sorry, I am not going to discuss this issue. One: I am short in time. Two: it was taken out of context. Besides, an unanchored shield around a twisted pair would build up a capacitor in parallel with the load (reference to a floating ground value) and not in series as your comment says.For your phase-related comments, do you know if the phase correction in the Adcom is done in the digital domain (I hope)? I will audition the difference with it, anyway.
Who said anything about a positive component not being mirrored by a negative one? Check this out: single driver as a source, nothing to compare (reference) against. Now, change the absolute polarity. Doing so would place an instrument’s fundamentals in phase with its decay information. It is the whole system (not only parts) that has been reversed in polarity.
View Fourier series “xâ€. Then flip it upside down. The time axis remains. The graph just looks upside down. Remember that since there are no other outside elements being introduced (or referenced to) there would be no further distortion (or change) of the system and its resulting response as represented by a complex waveform.
None the less, I will try the Adcom piece.Thanks for the comments about testing shield directionality. As I thought, the kinds of environments that I usually use for testing are not “noisyâ€. None the less, it is my job to try it.
Well, now for to the trip. I won’t be able to post anything until the end of next week.
Have a happy 4th of July.
AL
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Follow Ups
- Re: load resistors & shunt components - alberto a lopez 15:29:56 06/29/01 (1)
- Re: load resistors & shunt components - Mart 02:35:19 06/30/01 (0)
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