Looking at Vda, above #66687;
Any portion of the original signal held in Cda cannot be released to the Rl (input of transistor amp) at the same time because of Rda. And, the voltage developed across RL depends on the Cda and Rda and the amount of time the signal is present.... to be 'soaked' up by Cda. And, in turn the value of Rl..... with a lower Rl, lower Vda is developed across it. The Vda waveform will partially depend on the waveform that created the charge.
THx-RNMarsh
Any portion of the original signal held in Cda cannot be released to the Rl (input of transistor amp) at the same time because of Rda. And, the voltage developed across RL depends on the Cda and Rda and the amount of time the signal is present.... to be 'soaked' up by Cda. And, in turn the value of Rl..... with a lower Rl, lower Vda is developed across it. The Vda waveform will partially depend on the waveform that created the charge.
THx-RNMarsh
I have to admire the tenacity with which people are fighting over precisely the words to use, and the mechanism which is responsible for non-perfect behaviour in capacitors, 😉. Me, I'm dumb - either a particular capacitor affects the audible behaviour of the sound, or it doesn't. If it does, I toss it, and try another one - for some reason, getting a worthwhile result is a touch more important ... silly me, 🙂.
Pavel
Thanks for showing the baseline.
Let me know if you want some old beeswax capacitors to test.
ES
Thanks for showing the baseline.
Let me know if you want some old beeswax capacitors to test.
ES
It doesn't walk, it doesn't look like, it doesn't quack. I see no stinkin' DA.
Well that is the bottom line for normal people. Even the cap makers dont go into the material chemistry ... just give the measured data for our apps. use.
So far, only V coeff of the C is in the running as the other source of 'distortion'.
THx-RNMarsh
My latest measurement (today) was not to show DA, but non-linear distortion easily measurable with a harmonic distortion test. I was supporting PMA, who showed similar material, and I wanted to rub SY's nose into what I can easily measure today. '-)
One of the refs in that good DA paper of Kundert, [10] Desoer and Kuh, Basic Circuit Theory, was an attempt to introduce students to more generalized network elements, right from the start, including time-variant and nonlinear elements.
I have that book and it was helpful to a point, but I think it never caught on that much as a text. There was just no time to teach it all, for one. But it was unusually good in getting the basics across clearly.
I have that book and it was helpful to a point, but I think it never caught on that much as a text. There was just no time to teach it all, for one. But it was unusually good in getting the basics across clearly.
Waly mentioned that my first important tests were 40 years ago, as if that made any difference, but I can still measure pretty well today. I am NOT going to redo a differential subtraction test that I did 30 years ago. YOU repeat the test (if you have the test equipment) and attempt to refute Walt and me. Go for it!
They havent been forgotten.... just ignored..... though high esr has secondary bad effects. Dont intend to spend time on those. Just the distortion from DA.
I already said the esr has a dc and ac component... the ac starts to become significant at higher freqs..... generally speaking above audio. But the esr if high enough along with high current will lead to internal temp rise and temp has an affect on most every parameter - to more or less degree.
-RNM
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Pavel
If you are up for one more test how about a three filter string CRCRCR with two input signals. Be interesting to see how many harmonics show up.
ES
If you are up for one more test how about a three filter string CRCRCR with two input signals. Be interesting to see how many harmonics show up.
ES
A little diversion from the current discussion.
Physicists Zap a Semiconductor with a Laser, Accidentally Produce a New Quasiparticle
Physicists Zap a Semiconductor with a Laser, Accidentally Produce a New Quasiparticle
Soon we will get someone saying distortion can only mean non-linearity. I use the word in original DA article as waveform distortion.
As I said before, I dont know if the measured 2H is 'real' or not real.... so i never talked about it and never published such DA affect.
A quantum droplet?
THx-RNMarsh
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Ahhh, it's gotta be fake ... they used the word "quantum" in the writeup !
I very specifically worry about non-linear distortion - linear doesn't bother me, especially because it is always fixable if one so chooses ...
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