I'm still hoping Pano figures out the fundamental flaw in his perspectivity reasoning.
(elementary, my dear Soni. Most people look at the orange crate, not the orange)
I'm Pennysavior Dutch.
You can use a harmonic neutralizing ferroresonant transformer which will knock distortion down typically to less than 1%. However, they run hot and tend to be noisy audibly.
Google shows quite a few. You can use filters composed of caps and coils for starters. I suggest you don't call others naive considering you endorse Bybee fraud products. You are correct ,discussing results rather than showing "before" and "after" does leave you open to criticism but since you aren't going to share your precious results, who cares? You seem to have quite the chip on your shoulder if anyone brings up that perhaps you are wrong about something.
Utilities cannot guarantee noise due to local high current spikes from motors like from washing machines, refrigerators, dryers, woodworking tools, compressors, etc. and larger switching power supplies. One approach to reduce noise on a single supply phase is to wire the house so that most appliances operate off the other phase.
I actually took to running the motor of my LP12 turntable from a sinewave output from a Dynaco Stereo 70 channel stepped up through a 12VAC transformer wired backwards. I gained the ability to run at 45rpm also, and the sound did definitely improve compared to powering directly from the mains supply.
Another thing I've done is design tube regulators for my phono preamp that have unusually high rejection of input noise, including using a nulling trimpot with an input rejection network. I found that doing that gives a sonic improvement better than using a ferrotransformer. My DC coupled OTL is fully balanced so tends to have relatively good supply rejection overall.
Another thing I've done is design tube regulators for my phono preamp that have unusually high rejection of input noise, including using a nulling trimpot with an input rejection network. I found that doing that gives a sonic improvement better than using a ferrotransformer. My DC coupled OTL is fully balanced so tends to have relatively good supply rejection overall.
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In the late 90's, IBM did a series of measurements of different power lines in various cities and published it in an IEEE Journal.
They found it both different for different locations and to be cyclic with the time of day.
My associates and I, then being in the business of making an effective ac line filter, made several measurements with spectrum analyzers for various locations. We found that the remote countryside was usually pretty low in added garbage, but cities and the suburbs can be VERY dirty, will all kinds of stuff out to channel 5 or more.
Actually, Richard Marsh and Demian (on this website) have even more experience than me on this problem and its solutions.
We DID find where the Bybee devices did virtually nothing, because of the location, and I have personally heard when a simple pair on Bybee devices (one in the hot, one in the neutral) made a BIG difference at a hi fi store not 6 blocks from where I used to live in the suburbs (Walnut Creek, CA).
Jack is pretty realistic that they have to be tried in specific locations in order to hear if they make any difference. Even Jack and I can be surprised.
Now, I am not recommending to any of you to try Bybee devices. You simply don't have enough invested in your hi fi playback to make this relatively expensive component, worthwhile.
Now, the way that you actually need to measure the AC line is to first find a way to isolate it, so that you do not get shocked, then you have to make a passive 50 or 60 Hz NOTCH filter, to filter out the main frequency, and THEN a spectrum analyzer to show the individual components. A scope, alone, will not do, just like it is inadequate to show typical distortion at normal operating conditions.
People here might be surprised what they find, IF they did this test.
They found it both different for different locations and to be cyclic with the time of day.
My associates and I, then being in the business of making an effective ac line filter, made several measurements with spectrum analyzers for various locations. We found that the remote countryside was usually pretty low in added garbage, but cities and the suburbs can be VERY dirty, will all kinds of stuff out to channel 5 or more.
Actually, Richard Marsh and Demian (on this website) have even more experience than me on this problem and its solutions.
We DID find where the Bybee devices did virtually nothing, because of the location, and I have personally heard when a simple pair on Bybee devices (one in the hot, one in the neutral) made a BIG difference at a hi fi store not 6 blocks from where I used to live in the suburbs (Walnut Creek, CA).
Jack is pretty realistic that they have to be tried in specific locations in order to hear if they make any difference. Even Jack and I can be surprised.
Now, I am not recommending to any of you to try Bybee devices. You simply don't have enough invested in your hi fi playback to make this relatively expensive component, worthwhile.
Now, the way that you actually need to measure the AC line is to first find a way to isolate it, so that you do not get shocked, then you have to make a passive 50 or 60 Hz NOTCH filter, to filter out the main frequency, and THEN a spectrum analyzer to show the individual components. A scope, alone, will not do, just like it is inadequate to show typical distortion at normal operating conditions.
People here might be surprised what they find, IF they did this test.
Welcome to all of Europe!
Once upon a time we had different voltages from country to country.
In Germany it was 220V, in the UK 240V for example.
Now it is all harmonized to 230V but instead of changing the voltages the different power generators fed into the net to more or less exactly 230V the powers that be just increased the allowable error margin so everything from 210-250V is perfectly legal.
Personally I have no noise issues that I am aware of.
I used to get some noise when my fridge kicked in but that stopped the moment my entire system used balanced interconnects.
Put an end to the horrible noise coming from my computer screen as well.
Ahh-hmmm.... (cough, cough) I was trying to be polite and not squash your orange. 😱
Read your example again:
http://www.diyaudio.com/forums/lounge/234829-funniest-snake-oil-theories-141.html#post3562988
and think about it. Think orange, think Earth, think featureless sphere. Think sphere without poles.
http://www.curtisind.com/files/pdf/RFI-Filter-Catalog-June_2012.pdf
http://11junk.com/jeffl/crud/EMI-Filter-Design.pdf
Took maybe 5 minutes searching and there are of course plenty more.
Now we come to the Bybee website where it is stated........"These new products were created based on a breakthrough in quantum purification technology: a new kind of device incorporating carbon fiber and nanotechnology. Plus, all Bybee Quantum Purifiers are cryogenically treated to enhance performance"
Golly Gee 🙄
http://11junk.com/jeffl/crud/EMI-Filter-Design.pdf
Took maybe 5 minutes searching and there are of course plenty more.
Now we come to the Bybee website where it is stated........"These new products were created based on a breakthrough in quantum purification technology: a new kind of device incorporating carbon fiber and nanotechnology. Plus, all Bybee Quantum Purifiers are cryogenically treated to enhance performance"
Golly Gee 🙄
Yes they do nothing in systems where the people listening do a simple ABX DBT or even a SBT.
They are effective in systems where the person auditioning is gullible, doesn't bother with a blind test or just doesn't care to find out.
Love the sarcasm and snide remarks as usual from you in the last part about us peasants.🙄 I guess we will have to go through life deprived of the Bybee magic. 😀
Interestingly enough, the first Bybee's that I got, WERE used as doorstops, by my ex, who was then a reviewer for TAS. I first thought they were expressly made for CD, and were phase correcting filters of some kind, and since I did not like CD, I didn't think that I could make use of them, even to evaluate.
She apparently didn't bother to evaluate them, either, and used one as a Doorstop.
I found this out, later. Sort of a source of embarrassment to me, to be so cavalier about such an expensive device.
She apparently didn't bother to evaluate them, either, and used one as a Doorstop.
I found this out, later. Sort of a source of embarrassment to me, to be so cavalier about such an expensive device.
Only thing you had to think about was the validity of the influence of air on observations.
Aka : Objective reasoning.
Think orange, think earth :
If air was an essential factor, it's influence decreases in colder areas.
A mast would take longer to vanish.
Reality is that it dissapears sooner => makes the theory of perspective invalid.
Think sphere without poles : subjective reasoning.
That earth has poles was prior knowledge (from visual observation) thousands of years before it was proven that earth is spherical, and not flat.
Think you're blind, speak no language, never learned a thing, then claim to be able to rationalise.
Look at the relevant things- the output of the power supply and the output of the overall box of gain.
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