....yet the ear apparently can...
Can you post one and only proof( DBT result)?? Or only claims..
Back in the beginning of the 1980s we were able to find some evidence for sound differences between two film capacitors compared as coupling caps between a MC head amp and a MM stage (including the RIAA network) in a controlled listening test.
Of course amateurish as it was our first attempt at "blind" listening tests - as described earlier - after i´ve read two articles by Dan Shanefield about the necessity of these tests.
A/B test and five correct identifications out of 5 trials. MKS4 (polyester) compared to Polypropylen film, measured value <2% , input impedance 47kOhms,output impedance <100 Ohms .
That's a rule of thumb in this thread, isn't it? One of the reasons why it was put in the "Lounge". What do you expect after all these years?
Lots of people claim that crystal healing works, they can divine for water and talk to ghosts. Just because lots of people say it doesn't mean it's true.
That's because SCIENCE was used to extract the active ingredient. Henry Wellcome spent much of his life travelling the world to collect local remedies that he could then extract active ingredients from. Good science not flooby, at least until things went badly wrong with fudging results or not testing properly.
yes. Its all been said before ---
meanwhile. I ran across an old system file from old HDD. I'm using 2Tb SS now. 10+ yrs ago.
3-way DynAudio esotar drivers. 400W/8 mono-blocks. 2- rear loaded and folded transmission lines with 18 incher. even a TT.
I am saving those CFA mono-blocks for the 2 way JBL M2 and a new CFA for mid-HF. .. Still being built.... done this summer.
THx-RNMarsh
meanwhile. I ran across an old system file from old HDD. I'm using 2Tb SS now. 10+ yrs ago.
3-way DynAudio esotar drivers. 400W/8 mono-blocks. 2- rear loaded and folded transmission lines with 18 incher. even a TT.
I am saving those CFA mono-blocks for the 2 way JBL M2 and a new CFA for mid-HF. .. Still being built.... done this summer.
THx-RNMarsh
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Two years ago I tested Mundorf M-Cap ZN 3.3uF against MKT1813 3.3uF Vishay capacitor in a high pass filter circuit, 3.3uF + 4ohm, at 1kHz, distortion vs. amplitude. I found no difference between these 2 caps, though one is MKT ("mylar") and the other one is polypropylene Mundorf - Inner Excellence
3.3uF + 4R makes 12057Hz cut off (-3dB), so 1kHz is deep in range where there is a significant voltage across the cap.
That's interesting. I thought it was well known that conventional measurements with ordinary test equipment show that mylar/polyester is a slightly nonlinear dielectric. In some cases sufficiently non-linear that in some circuits you can hear the difference. No need to invoke DA at all. Used correctly you should hear no difference.john curl said:
Why give an example which undermines your own case?
Must read information on achieving state of the art 1/f noise and offset in the uvolt region by the choice of a CMOS chopper amplifier rather than a jfet opamps for servo cicuits by Monte McGuire in the following diyaudio thread.
http://www.diyaudio.com/forums/parts/319471-opa-140-ad-4625-op-amps-servo-1-5-noise.html#post5358304
http://www.diyaudio.com/forums/parts/319471-opa-140-ad-4625-op-amps-servo-1-5-noise.html#post5358304
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The huge die area Ccomp.You mean the intended Ccomp or the parasitics?
George
The converse is also true...ie just because Mr Randi conducted one 'famous'
test does not prove that dowsing is not real.
Dowsing is no big deal, it's just understanding and using the senses that you were born with, and told in day one of school that you don't have.
A whole lot of health problems would evaporate if we all understood and recognised the positive and negative effects of ground radiations....the churches are guilty of great deception and misuse of this 'esoteric' knowledge.
Bill, try learning dowsing....hint, you have it in you already and the rods are unnecessary and are merely indicators.
Peoples over long periods noticed and empirically proved that particular plants provided remedy and cures for particular ailments.
Mr Welcome merely tapped into that time proven knowledge, isolated and synthesised the principal active constituents and marketed them without the sometimes important cofactors....a perfect recipe for deleterious 'side' effects and not by definition 'good science'.
The medical drug world and the agrochemical world is full of fudged results and inappropriate/inadequate testing.....many unfortunates pay the price of this profit or ego driven dishonesty/folly.
In a similar vein to empirical medicinal plant knowledge, so it is that empirical audio knowledge has it's place.....the task is to discern what the ear detects and current testing methodologies do not.
Dan.
I have thought of this test equipment/measurement conundrum myself....and agree that this discord is a distinct possibility.
As to what is 'wrong' and not sounding 'right', imho it's all to do with the materials involved in a typical audio recording/reproduction chain.
Ime materials act as 'filters' of sorts....each has a characteristic energy absorption spectrum and energy return spectrum and this is audible because of modulation and intermodulation products.
These low level modulations may be pleasing or may not be pleasing, and may give rise to preferences.
Some of these products are within the audio band and also out of audio band, maybe way out of audio band....who knows how high frequencies.
Perhaps audio test equipment needs to go all the way out to millimetre wave frequencies to capture the subtle differences that ears/body/mind/brain detects and conventional audio test equipment does not.
Dan.
It is unfortunate that a discussion examining the truth of this rather peculiar assertion would rapidly gain the attention of the Mods. Let us just say that I have never come across any genuine church which even mentions "ground radiation", either to encourage or warn people. It seems that your knowledge of theology may be similar to your knowledge of science.Max Headroom said:
Chris, I do have direct experience of dowsing and ground radiations, I do sense that minerals and crystals have characteristic 'feel/'vibe' (try holding a piece of high grade uranium ore), but I don't subscribe to seeing or hearing spirits or ghosts.....my feet are firmly planted on the ground, thank you.
Regarding churches concealing knowledge, I accidentally stumbled onto an uber strong 'healing' spot in the entry of an 800 yo cathedral in Switzerland.
I subsequently dowsed this as an intersection of two very strong energy (ley ?) lines that the congregation was forced to pass over twice per church visit....think it through, this is a conspiracy of the highest order.
The earth's crust is riddled with fault lines filled with concentrations of beneficial or deleterious minerals and compounds....these act as moderators/modulators and concentrators of the earths inherent radiations.
These modulations couple to elements/compounds within the body and alter physiological processes, and are well capable of causing disease and also the contrary.
Nothing magical about it this is old knowledge, Australian aboriginal elders are well versed in this 'hidden' factor, ignore or deride it at your own peril.
Dan.
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