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Old 23rd April 2013, 12:34 PM   #11
The Dastardly Dad of Three
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The blind test regulator reviews in Linear Audio on these were interesting I thought and well worth a read if you're looking for some impartial info. Cheers
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Old 23rd April 2013, 12:40 PM   #12
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Originally Posted by kasey197 View Post
The blind test regulator reviews in Linear Audio on these were interesting I thought and well worth a read if you're looking for some impartial info. Cheers
where is it? I looked but didn't find.
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Old 23rd April 2013, 12:55 PM   #13
qusp is offline qusp  Australia
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its in the magazine, worth a read. the dac PCB layout is quite terrible (scary), its not surprising they managed to make an ESS dac that performed at a level able to be clearly distinguished as bad. funny they talk about EMI, the thing looks like an EMI nightmare. 2 layer PCB punctured with hundreds of PTH, because SMD parts, except for the dac itself of course, are so abhorrent and dont get me started on the evils of ground planes

the test result worse than 7805 was what I was talking about, quite funny, that takes some effort
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Old 23rd April 2013, 01:23 PM   #14
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[QUOTE=mr_push_pull;3465245]where is it? I looked but didn't find.[/

A comparative overview of power supply regulator designs with listening tests
John Walton

Volume 4
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Old 23rd April 2013, 01:42 PM   #15
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thanks.
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Old 23rd April 2013, 01:58 PM   #16
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Originally Posted by qusp View Post
dont get me started on the evils of ground planes
Click the image to open in full size.

and since it seems that the regulator shooutout is only available in the printed version of Linear Audio, here's a table and Thorsten L's opinion: DIYHiFi.org • View topic - Power Supply testing/debate at Linearaudio & Pub...

I'm rubbing my eyes in disbelief. I mean... is anyone surprised that a regulator which, well, seems to not regulate too much is imposing something on the signal? therefore changing the signal? (at which point we should remember that different sound = better sound). why is it even called a regulator when in fact it seems to be an effect box?
or why even consider the fact that the behavior of that thing is clearly circuit-dependent and it will likely sound different in other implementations? "but is has electrolytes!"
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Old 23rd April 2013, 03:10 PM   #17
godfrey is offline godfrey  South Africa
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Looks like total nonsense to me
What did you expect? It says "Burson" at the top of the page.

Best bit:
Quote:
To learn more about the fabrication process of Intergraded Circuits please visit the following links:
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Old 23rd April 2013, 03:23 PM   #18
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this is really too much. I mean, measurements don't tell everything, we know it etc.

but when one designs regulators which don't regulate in order to modify the signal, something is certainly wrong. ok, I get that with op amps there's the slightest trace of logic in it, because signal passes through them. but when one intentionally gets to alter the signal by altering the power supply, it's the Apocalypse of common sense.
"but it has electrolytes!"
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Old 23rd April 2013, 04:08 PM   #19
godfrey is offline godfrey  South Africa
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Originally Posted by mr_push_pull View Post
this is really too much.
Meh, I've seen worse. Have you seen any of Chris Daly's creations? e.g. this: Light Dependant Resistor Current Control

Take a long hard look at the schematic in post 5. Nope, no mistakes, that really is what the circuit looks like. The explanations of how it works were hilarious.

And yes, it counts as a commercial product - He actually built those and sold them on eBay, along with opamp upgrade modules based on this idea: Powering Opamps???
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Old 23rd April 2013, 04:39 PM   #20
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let me see if I get this right. guy said to himself "I'll draw a schematic so that everything suggest current instead of voltage, because current is good and voltage is bad. I'll put a LM317 in current source configuration and throw diode connected transistors all over the place. just throw them together and make it as weird as possible. maybe it even works".

PS: thanks for the Pease articles on Howland current sources though there's a good part in everything I guess.
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