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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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CJ Yes I have assessed AC polarity in my system.Romy says "I took today my large
3kW isolation transformer and place it between my dedicated line and
PP3000. I lost my lower bass, simple as that. "Speaking of isolation transformers, I have not h...
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Yes, this is kind of strange. This is a cheap Blue Ray player; I think it is Sony BDP-S790 for $279. It played anything and supports live stream for pretty much anything. It is very comfortable to have it in opera room as video source. The picture is...
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Denis,
There are objective characters of electric wave and deviation from it sinusoid profile impact sound. Leaving the HF noise aside I would say that there are also some unknown characters of electricity that impact sound. What you report shell no...
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[quote user="Romy the Cat"]Finally, the PurePower regenerator does not address problems of playback with electricity .. [/quote]The last few days I had a chance to look deeper into the nature of PurePower’s Sound, particularly in an ability to modera...
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This is very interesting, Anthony. I do think that absolute polarity has own role to play. Also, do check the DC that might be sent out of your preamps, certainly with Placette and with your 10Y before the transformer. Chas it with disconnected Milq ...
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Paul, after a month of vacations I've tried you advice:[quote user="Paul S"]If you can do it, try isolating both cases/chasses from your "ground plane(s)". Use one inclusive "ground plane" for both the PS and the gain/RIAA sections, and ground this "...
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Apparently, TTs are so mysterious that anything goes, as long as it's long, convoluted, and circular. Multiple DC motors "make sense" if one starts by believing that an AC motor naturally slaves to its sine wave and polarity, and that this behavior ...
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Ok, you are getting somewhere. I am not sure why I used the 100R, 50R and 22R resistors. It is good idea in some cased to list the potential of some circuits but it need to be used ONLY what it necessary. Do not forget that in your case you have 5 ch...
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[quote user="JOHNR"]One of the things that I picked up in this thread is the fact that if you use 2 PSUs in series, the sound degrades.This is typical of one unit generating common mode noise and this adds to that produced by the second unit.Even if ...
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[quote user="JOHNR"]One of the things that I picked up in this thread is the fact that if you use 2 PSUs in series, the sound degrades.This is typical of one unit generating common mode noise and this adds to that produced by the second unit.Even if ...
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Lx, you do not need to convince me that PP2000 has problem or problems. Of cause it is way beyond the sophomoric solutions like lift the ground and AC polarity. No, I did not try the cascading PP2000, I did ask PurePower about it and they were no...
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[quote user="Lx_"] Well, this is consistent with the behavior I have. I can hear electrical devices behind the PP, especially those of the switching PS type: computer screen, laptop charger, DSL box, printer, SAT decoder... Good luck finding electron...
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A few weeks back I created an account at AA’s PS Audio forums. I was uploading there a few posts and had no problems. I presumed that the sponsorship of the PS Audio is kind of shielding me from the idiocy of the assholes what runs AA site. Eve...
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For those seeking convenience or the plain lazy there's an interesting and very affordable gadget from Van den Hul:
POLARITY CHECKERWorks without a battery, thus is always ready for use !
Its liquid crystal display safely senses and indicates the v...
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[quote user="Lx_"] Another example of cannot-measure-it-but-can-hear-it? [/quote]Oh, yes, there is plenty of it in the audio electricity world. It is not that “cannot-measure”, everything might be measured the problem is that we have no idea wha...
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Jessie,
Actually the tendency of manufactures to isolate ground becomes almost common among any more or less serious manufactures nowadays. The main’s ground is so polluted in US hat it is scare… or even dungarees. I remember a few years ago when I...
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We all agree that acoustic polarity (phase) and AC polarity are important. Stop already.
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[quote user="clarkjohnsen"] Then you haven't looked close enough. [/quote]
Or perhaps the equipment that I used was not made by clueless people?
[quote user="clarkjohnsen"] This is where you veer off course. The AC polarity under discussion...
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I have drawn up my 20Hz subwoofer horn in Google SketchUp 3D. This horn is more for home theater than for music. My smaller 40Hz loaded with B&C Speakers 8PE21’s is more musical and articulate. The 20Hz tapped horn is loaded with two Tang Ban...
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[quote user="Romy the Cat"]You decided to go with mA or are they mV against 1R resistors?
I prefer the second approach personally and I feel that I can moderate the quality
of resistor and I can’t moderate the quality of the milliampere meter coil....
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This thread has been pretty interesting overall. I've read most of it and would at least like to provide some feedback on the technical side of designing with the 45 and 2A3 DHTs... at least from my personal experience. A few years back I decid...
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[quote user="Chirag"]The 6E5P is an interesting device (I did some research after you dropped the "tetrode" hint and bought a few :-)), but the bias scheme with the OA2's is still incomprehensible to me. [/quote]Ok, I will try to explain.
The...
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[quote user="RF at Ona"]Reading about the sensitivity of your system to electrical power supply problems reminds me of the days when I used to make my own equipment as much for the learning experience as for the final result.One of the mundane things...
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[quote user="clarkjohnsen"]Since all audio folks know that the wall gives us highly variable power (voltage being just about the least important aspect), it occurs to me that a way to measure it that includes all the various parameters would be highl...
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[quote user="Romy the Cat"]I did not say how my saga with APS Pure Power regenerator finish but it never finished. Since the end of the last year the regenerators is sitting in my closet and I have sent the unit’s main board to APS people for the “re...
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You decided to go with mA or are they mV against 1R resistors?
I prefer the second approach personally and I feel that I can moderate the quality
of resistor and I can’t moderate the quality of the milliampere meter coil.
The whole thing looks l...
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