audiojoy said:
Never deterred by the better argument, are we?
The mysterious turntable that really needs a sine (presumably to make sure there are no harmonics in the rotation?!?) still needs only 5W or so. You can create a good clean sine and use a chip amp (if necessary + transformer) to drive that turntable.
You ain't heard nothin' yet. You need two piezos, one for each supply rail, and then you need to phase-couple them mechanically. Of course they must be wired 180 degrees out of phase electrically so that the bad tachyons turn into good muons. Best results are usually achieved with an unused viagra pill as the mechanical element.
wine and dine thank you for your comments.
ultimately this thread will be of more interest for those who have heard the benefit of ac regenerators be it on turntables or preamps. Please see Stereophile reviews about their potential benefits in these equipments. If they like the outcome then they can use my method to achieve a very close outcome at a much lower price.
Same with the Piezobee a cheap substitute that really works.
ultimately this thread will be of more interest for those who have heard the benefit of ac regenerators be it on turntables or preamps. Please see Stereophile reviews about their potential benefits in these equipments. If they like the outcome then they can use my method to achieve a very close outcome at a much lower price.
Same with the Piezobee a cheap substitute that really works.
star882 said:
Exactly.
There is no vodoo in the original mains waveform and no black magic to protect from it inside a sinewave inverter.
wine&dine said:
Done that. Some motors need more than 15W to spin and chip amps hate the combined inductance of the motor and step-up transformer. Driving impedance is no longer low and if you need separate phases you also need two transformers. Class D?
I experimented with regenerators several years ago. Had a phono preamp powered by regenerated low voltage AC. Could still hear different power cords to the regenerator, so obviously mains noise was entering in the usual way. Which makes me think a never-connected type PS is probably more useful.
Batteries are hardly a universal solution. Same as capacitors, their sonic flavour varies a lot.
It is all very well using what we understand from science to refute potential benefits from various tweaks e.g BYBEE Piezobee ac regnerators, but like my ears and the ears of many other people who use such 'gadgets' the influence these tweaks have on the souind is undeniable and repeatable. Arguments should perhaps be pointed more in the direction of explanation of the findings.
The noise which is most difficult to filter is the one produced by placebo effect on your brain. In untrained people it seems that the data gathered by their senses becomes altered before they have a chance to consciously process it... 😉
Think old-school...
Perhaps a high quality inverter (whether stand-alone or as part of a double-conversion online UPS) might provide cleaner power than the grid, but in most cases I doubt it. But "cleanliness" isn't the only factor to consider. What about load regulation and impedance?
In any case, how about an old-school solution, such as a dynamotor? This is a motor/generator pair - they were used for isolation, voltage or phase conversion. No noisy electronic inverters. Use an oversized set (and maybe a flywheel) and regulation should be excellent. Or what about driving a DC generator? That could be interesting.
Perhaps a high quality inverter (whether stand-alone or as part of a double-conversion online UPS) might provide cleaner power than the grid, but in most cases I doubt it. But "cleanliness" isn't the only factor to consider. What about load regulation and impedance?
In any case, how about an old-school solution, such as a dynamotor? This is a motor/generator pair - they were used for isolation, voltage or phase conversion. No noisy electronic inverters. Use an oversized set (and maybe a flywheel) and regulation should be excellent. Or what about driving a DC generator? That could be interesting.
the persistent consistency of the characteristic audible effects heard by thousands of audiophiles (who have extremely well trained ears in the majority) suggests that the factors inherent on the sound changes are externally created and certainly not placebo. Our differing experiences with sound and the vast complexity of the brain suggests that placebo effects would produce more random findings in the description of the sound changes heard with these gadgets.
Psychological effects are probably a big factor. Simply enough, just the thought of making an improvement can affect the perception of the quality.audiojoy said:
One way to avoid that is to set up a system in such a way that none of the parts being changed can be seen. Then have someone evaluate the quality. Then "make a change" (which could be upgrading/downgrading a part or even not actually making a change at all) and ask that person to reevaluate the quality. Repeat this a few times and collect data.
audiojoy said:
Well, there are those who claim telepathy works, so let's start to explain these findings!
Repeat your findings in a controlled double-blind experiment (including e.g. a control that injects arbitrary low-level noise for comparison) and we're talking.
Until then, the majority of technically-minded users here will regard the "piezo ac regenerator" stuff as gobbledygook based on the pseudoscientific language used to describe it, which my complex brain, being highly trained to detect BS, immediately correlated with the usual snake oil pitches.
You are of course perfectly entitled to your opinions about what parts attached to your kit will make the output more to your liking. Just don't throw words like undeniable around here or someone will take up the invitation.
the easiest and cheap method is to use a 100V distribution amplifier which can work off 12 or 24 V DC like a battery.
then you need a low distortion 50 or 60 Hz oscilator.
you just have to turn up volume till you get the voltage you need.
then you need a low distortion 50 or 60 Hz oscilator.
you just have to turn up volume till you get the voltage you need.
Promitheus
did you try your suggestion??
more importantly was there any beneficial effects on the sound measured or unmeasured???
did you try your suggestion??
more importantly was there any beneficial effects on the sound measured or unmeasured???
wine and dine
only just got round to reading your last post
Yes, undeniably is the apt phrase. Audiophiles can repeatedly replicate a sound change over and over and over and over again without fail. That is undeniable. Hell 10 of us can sit in a room and hear the changes over and over again. Have you never sat in one of these audiophile evenings at all??? If not then what is your purpose for doing 'diy hifi'. I suspect you are not into the art of being able to listen to hifi with an extremely critical ear and probably not really a lover of the art of music so you would not really grasp any of these concepts.
Sorry to dissapoint you but whether it can be measured or not the Piezobee works and can be proven repeatedly in double blind trials. I bet i could demonstrate a change in resistance or inductance or capacitance that was contrubuting to the change in sound. that is obvious as the piezobee has a number of effects on these electrical perimeters
only just got round to reading your last post
Yes, undeniably is the apt phrase. Audiophiles can repeatedly replicate a sound change over and over and over and over again without fail. That is undeniable. Hell 10 of us can sit in a room and hear the changes over and over again. Have you never sat in one of these audiophile evenings at all??? If not then what is your purpose for doing 'diy hifi'. I suspect you are not into the art of being able to listen to hifi with an extremely critical ear and probably not really a lover of the art of music so you would not really grasp any of these concepts.
Sorry to dissapoint you but whether it can be measured or not the Piezobee works and can be proven repeatedly in double blind trials. I bet i could demonstrate a change in resistance or inductance or capacitance that was contrubuting to the change in sound. that is obvious as the piezobee has a number of effects on these electrical perimeters
How cheap DIY PURE AC regenerator compare with PS audio AC regenerator which costing US $3000-5000 ?
regnerator pure sine wave 12v to 240v about £60, plus 12v regulated power supply from 5-20 UK pounds.
What is the performance of DIY PURE AC regenerator VS PS audio AC regenerator which costing US $3000-5000 ?
I have tried several brands, all have worked well, all labelled as pure sine wave 50w and 100w for cd players and preamps. Cannot remember their brand names as it has been a while since i have used one. Not that keen on them for reasons explained in the very first post.
MBL It really is that easy!!!!
$$$$$££££££££
Please give some feedback. It is very rare that I get any feedback on any of the free money saving ideas I give away, either because of a commercial interest or because of the lack of subjective objectivitiy as oppossed to objective objectivitiy that can be so restrictive by physics and emotional connectivity
$$$$$££££££££
Please give some feedback. It is very rare that I get any feedback on any of the free money saving ideas I give away, either because of a commercial interest or because of the lack of subjective objectivitiy as oppossed to objective objectivitiy that can be so restrictive by physics and emotional connectivity
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