Only one problem: do you have any data to show? Wait, since it is a "clearly hear", nobody cared to collect, right?
Hehe. T blows hot and cold, I don't know if I'm coming or going half the time, probably that artistic nature that I, more than likely falsely, presume he has. Still, I can handle it
What A/B tests? You frequently mention the large investment in time and money in valid scientific tests that won't happen. Did that happen with the sound of capacitors, I missed it? Besides the claim was distortion of a voltage signal with no AC component to distort, easily measured.
No need to wait. He already did. https://www.diyaudio.com/forums/the...wtorch-preamplifier-iii-2429.html#post5842341
If I can pass through the recent atrocious SN in this thread I would just thank Simon for the contribution on the topic of passive component distortion/noise, excellent, in essence we may now conclude that we can pretty much put the capacitor discussion more or less to rest, at least seen from THD pov., although I still wonder a bit over DA effect on non-harmonic asymmetric signals and jc's liking of polystyrene caps, perhaps also very small although some may still debate the significance of it.
BTW Simon, what Wima capacitor, ie. or more exactly, what dielectric material is the yellow line in your attached pic, post #32054, metalized PP?
BTW Simon, what Wima capacitor, ie. or more exactly, what dielectric material is the yellow line in your attached pic, post #32054, metalized PP?
Yes, most of the time quoted one star for the WAF. ;-)I can imagine their visual impact has quite an effect on the perceived sound
As a motor engineer, do you think that not everyone who buys cars has a driver's license?
(May-be not all, But I know a lot of datas from A.D., PMI etc. and then ?)
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The capacitor data was from more if a survey to see if it was worth doing a full scale set of tests, so I don't have full notes on those.
Scott,
The Rel-Caps do measure as far better than almost all others. I can say that here because even with RNM on vacation he normally ignores me and I see no need to feed the...
Scott,
The Rel-Caps do measure as far better than almost all others. I can say that here because even with RNM on vacation he normally ignores me and I see no need to feed the...
The name of the forum is DIYaudio. So, I suppose it is all about music ?
Music is played* with the ears. Many of the greatest modern musicians do not come out of the conservatory* of classical music. Those who were issued from it all said that it had taken them years to unlearn and transform themselves from the reader and the programmed automaton that the schools had made of them (instrumentalists unable to improvise) into a musician.
As nothing is perfect in the universe in which we live, as we dont know all of the laws of physics, as the materials our technology use are not perfect either, neither the way we assemble them, as we do not know a lot about psychoacoustics and physics (it should be stupid to believe this), there is an element of 'violin making' in the construction of audio systems. Violin making is not just a question of formulas, and limiting oneself to "objective" datas is an attitude of a small civil servant.
Nor does it imply that it is good to ignore the laws of music and harmony.
*Words that have a meaning.
Music is played* with the ears. Many of the greatest modern musicians do not come out of the conservatory* of classical music. Those who were issued from it all said that it had taken them years to unlearn and transform themselves from the reader and the programmed automaton that the schools had made of them (instrumentalists unable to improvise) into a musician.
As nothing is perfect in the universe in which we live, as we dont know all of the laws of physics, as the materials our technology use are not perfect either, neither the way we assemble them, as we do not know a lot about psychoacoustics and physics (it should be stupid to believe this), there is an element of 'violin making' in the construction of audio systems. Violin making is not just a question of formulas, and limiting oneself to "objective" datas is an attitude of a small civil servant.
Nor does it imply that it is good to ignore the laws of music and harmony.
*Words that have a meaning.
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I spent the day at an auction of a defunct machine shop. First they sold 300 or so boxes of misc. pieces parts and glaziravouts. I wouldn't have paid more than scrap value on virtually all of them. I did buy one piece from one of those lots winner.
I got two small sliding tables each on dual round rails for $20.00 delivered to my shop. Those might get to automate the back gauge on my press brake.
I did eye one machine for the digital readouts that were attached to it. The bidding started on that machine at $5,000.00 asked but it sold for $750.00. More than I would pay for the readouts.
As there were 650 or so lots to bid on and what I wanted was lots 561 or 562 or 563, I just left a paper bid as I had been there 5 hours and they were just hitting number 300. Yes I am a wimp not sticking around in an unheated shop with rain pouring in, puddles on the floor and generators used to power the mostly failing electric lights.
I did make arrangements to fix their broken wireless microphones and stop back to see if anything of interest was left.
Kind of surprised that the shop had been closed for 8 years with roof leaks and all the gear sitting there. Quite a bit was WW2 surplus machinery. As the weather was bad most of the folks were serious buyers knowing what they were looking at. (Apparently the previous operators of the gear were not quite properly gentle with most of it.)
I did speak to the owner whole told me how they moved much of the gear into place. Killed any remaining interest in those items. Moving a precision machine tool is actually quite critical. Pick up a lathe with a forklift under the middle and you have just made tons of scrap metal. Due to the trade war that has dropped to about $100.00 a ton.
I was looking to buy a Brown & Sharpe #2 surface grinder to sharpen my punches and dies. They had three. So I should know Monday if I got one. BTY that model used belt drive and these were converted to electric motors. Most importantly they were in a dry area and seemed in rebuildable shape. I offered $75 for the worst of the three and $150 for the better ones.
They also had some really nice small precision lathes that had been abused enough that many dropped their interest in them.
So the result is ruined shoes, a few bits of gear and introductions to machine shops that can make things down the road for very reasonable prices. (Particularly the Amish shops who were well represented. If course they don't use electricity in their shops! Meaning no telephones contact by visiting or mail.)
I got two small sliding tables each on dual round rails for $20.00 delivered to my shop. Those might get to automate the back gauge on my press brake.
I did eye one machine for the digital readouts that were attached to it. The bidding started on that machine at $5,000.00 asked but it sold for $750.00. More than I would pay for the readouts.
As there were 650 or so lots to bid on and what I wanted was lots 561 or 562 or 563, I just left a paper bid as I had been there 5 hours and they were just hitting number 300. Yes I am a wimp not sticking around in an unheated shop with rain pouring in, puddles on the floor and generators used to power the mostly failing electric lights.
I did make arrangements to fix their broken wireless microphones and stop back to see if anything of interest was left.
Kind of surprised that the shop had been closed for 8 years with roof leaks and all the gear sitting there. Quite a bit was WW2 surplus machinery. As the weather was bad most of the folks were serious buyers knowing what they were looking at. (Apparently the previous operators of the gear were not quite properly gentle with most of it.)
I did speak to the owner whole told me how they moved much of the gear into place. Killed any remaining interest in those items. Moving a precision machine tool is actually quite critical. Pick up a lathe with a forklift under the middle and you have just made tons of scrap metal. Due to the trade war that has dropped to about $100.00 a ton.
I was looking to buy a Brown & Sharpe #2 surface grinder to sharpen my punches and dies. They had three. So I should know Monday if I got one. BTY that model used belt drive and these were converted to electric motors. Most importantly they were in a dry area and seemed in rebuildable shape. I offered $75 for the worst of the three and $150 for the better ones.
They also had some really nice small precision lathes that had been abused enough that many dropped their interest in them.
So the result is ruined shoes, a few bits of gear and introductions to machine shops that can make things down the road for very reasonable prices. (Particularly the Amish shops who were well represented. If course they don't use electricity in their shops! Meaning no telephones contact by visiting or mail.)
Ironically I'll be spending a few hours this week re-capping my Hallmark Star Trek ornaments as several have died due to cheap electrolytics. For some reason you generally ignore work by folks like Samuel Groner, I guess that's the way it is.
Ed, I just got back from buying a 18" Craftsman branded bandsaw from the 1950s. My dad and I will be swapping around a few motors to best put them to use, so I'll get some practice with 240v with wiring. Would love a small swing precision lathe and mill with all the measurement trimmings, but in due time.
Maybe I can make some funky speaker boxes, but mostly I'm sure I'll be making sawdust. Good fun, imo.
Maybe I can make some funky speaker boxes, but mostly I'm sure I'll be making sawdust. Good fun, imo.
No I have even reviewed some of his work. I see no reason to criticize him here. Nor will I comment on where we disagree.
Now why would you need to replace parts others think are fine?
Thanks a lot Simon. I suppose no noticeable distortion in the source and no rejection of the 700hz level signal before measurement ?
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