Anyone Build a Power Regenerator?

[Fred Dieckmann]

"It could be probably quite easy to modify it into true power regenerator"

Tell us how then........

The fews UPS I have played with sounded pretty bad. I think it might be a total waste of time to modify one. The money would really be better be spent on a decent power transformer and a DIY amp and oscillator. This is really a pretty simple project I have seen plently of one op amp oscillator circuits around that you can probably build with Radio Shack parts. Do not use a funstion generator IC they have an incredible amount of distortion. it is not that hard to build an analog circuit to very the shape of the waveform to lengthen the diode conduction time either. I guess it is time for some people to do some actual R and D.........

[Peter Daniel]

I don't know how without schematic. But I happen to like that UPS for my line sources. Maybe yours was more crappy.

It doesn't work well with amps though.

[Peter Daniel]

Originally posted by Fred Dieckmann
I guess it is time for some people to do some actual R and D.........

When was a last time you did some actual R&D, if you insist on mentioning it so often?

[NickC]

Anyone
Do you have a suitable circuit for the oscillator preferably low distortion that i can use
thanks

[fdegrove]

Hi,

I guess it is time for some people to do some actual R and D.........

"A person with a deluded view of life is like a dog chasing his own tail. He believes that it is another dog’s tail. He chases the other dog around and around a tree thinking only, 'Just let me get that dirty dog!' He will never catch his own tail, just as neither wealth, power, success, nor prestige will guarantee our security. Eventually the dog dies, as do we. At that moment the dog dies, he does not know what he was about or why he dies. He is unaware that he has been chasing his own tail. Such is the deluded view of life, and many, many of us live this way."--Master Sheng-yen.

Time for some soul searching, perhaps?

Cheers,

[Tony]

"A person with a deluded view of life is like a dog chasing his own tail. He believes that it is another dog’s tail. He chases the other dog around and around a tree thinking only, 'Just let me get that dirty dog!' He will never catch his own tail, just as neither wealth, power, success, nor prestige will guarantee our security. Eventually the dog dies, as do we. At that moment the dog dies, he does not know what he was about or why he dies. He is unaware that he has been chasing his own tail. Such is the deluded view of life, and many, many of us live this way."--Master Sheng-yen.

amen...

[Peter Daniel]

Originally posted by Fred Dieckmann
Tell us how then........

I guess it is time for some people to do some actual R and D.........

I'm afraid Fred's becoming another millwood

[Da5id4Vz]

If you guys don’t mind, I’ve a few things to say about UPS's that may be mildly related to audio.

Most affordable UPS systems have inverter outputs specified as a modified sine wave. Most of us would call this modified wave form a square wave, saw tooth or ramp wave. Butt loads of harmonics. You need to spend some serious cabbage to get something like a best or Leibert UPS that has a low distortion sine wave output.

I think similar things can be inferred about the quality of the filtering and line conditioning of cheap vs. quality UPS.

These cheap things work well for our PC's because the PC's have switching power supplies that don’t care too much about sine wave distortion.

[Peter Daniel]

Originally posted by Da5id4Vz
You need to spend some serious cabbage to get something like a best or Leibert UPS that has a low distortion sine wave output.

Actually my UPS is a Best and when I looked inside it's indeed some serious stuff. That's why I didn't want to touch anything, it just seems too complicated.

I wouldn't be using it, if it didn't improve the sound. Works very good with my DAC, I didn't notice much improvement with a transport and I didn't like it with Zen or GC amps.

[analog_sa]

Peter

You may be absolutely right that your ups improves the sound, but admit it: it's a dead end.
For anyone willing to experiment, a good start is a Wien-bridge oscillator as found in Art of Electronics or any other basic electronics text. Choose the circuit with a miniature lamp as amplitude stabilising element - it's usually better than the ones with fets. Use a decent opamp (5534 is perfect) and when setting the output amplitude check the distortion with one of the many freely-downloadable spectrum analysers and your computer sound card. The only real problem the Wien bridge has is the difficulty of varying the frequency - that's what prompted me to choose the AVR.

cheers
peter