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In the Forum: Melquiades Amplifier
In the Thread: Staxquiades project
Post Subject: A bit more on the stabilizersPosted by N-set on: 9/27/2012
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 Romy the Cat wrote:
I very much doubt that we need any AC line dedicated stabilizers; even though I do feel that it is good to have more or less stable line.
Well, this is a very general statement, perhaps too general? I'd say that *purely theoretically* DC coupled designs cry for a line stabilization, but what's on paper and in the real life can be two very different things...
 Romy the Cat wrote:
The mechanical line stabilizers might be a bit too sensitive. If you have a voltage spikes for a few does of person you do not want the unit to react to it immodestly. The AC regulation has to be very gentile and you do not want to yank voltage too much by switching the transformer turns. Also, the transformers that those units have are usually very bad for sound. I did use a number of manual stabilizers and they all were sub-acceptable. There is another twist. Most of the mechanical line stabilizers has common mode and differential filters that made not for the “injected” voltage but for full load. Most of those filters not good, I mean were not good for sound. I agree that the mechanical solution is very simple and elegant, this is basically taping the transformer but the valuable transformers that I used did not sound right. I still have a few of them in basement and I do not see any use of them outside of my testing lab.

I think those points can be addressed...with a DIY design of course as I do not believe the industry is able to produce anything reasonable these days.
The speed of reaction can be easily controlled in the servo by some sort of integrating circuit with variable int. time.
Common mode and diff mode can be left aside. The autoformer and the buck-boost transf. can be made custom to good specs.
Then putting it all together nicely would be a challenge.

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