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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: I'll have to ponder thisPosted by Lx_ on: 3/9/2011
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 Romy the Cat wrote:
Possibly that you are right but it might be something else. My last year unit did inject back to power line a LOT of dirt. I just measured my new fixed unit and I was VERY surprised the it out back to the wall significantly less than older model, In fact what it is full load it outputs back to wall virtually nothing. I made a quick measurement test with how one PP2000 impact another. What the second PP2000 idling it tossed back to the wall huge amount of very nasty shit. As load grow it does it less and less, I use passive load however. When I look at the first unit out what the second one is running I see no evidence on scoop that second unit impact anything.

Another example of cannot-measure-it-but-can-hear-it? Anyway, the fact that output noise decreases with load seems an interesting lead to me. Less load means less current through the AC-DC input stage. Why would that generate more noise (unless noise is generated further down the PP, but the input stage seems more likely)? Could you be more specific about what you mean by "huge amounts of nasty shit" -- especially the what rather than the how much?
 Romy the Cat wrote:
Sonically however it sound very much like brand new BG caps use. You know that sound when HF feel like coals of 4-5 tweeter and all of them are not time-alighted? The HF are compressed but at the same time infinitely thin, like super sharp balde. I had very same effect from PP2000 3 years back when I exchanged the polarity of hot and neutral at PP2000 input. So, I wonder of possible that Pure Power accidently confused hot and neutral in one of my unit and this give me the ugly BG effect?

Also interesting. I never tried to invert AC input. Do you know if this also inverts PP outputs? If not I can easily try changing input polarity and listen to how it sounds.
 Romy the Cat wrote:
BTW, Lxm did you consider to add shunting capacitance to your buttery?

Yes, I even started to look at the CDE parts catalog online but could not find what I was looking for. I'd be glad if you could send additional details about what you have used.

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