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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Jarek, When you say "not 50 Hz hum" it reminds me very much of my troubles I had with my Pure Power 1500 -- (before it "blew up" and needed to be repaired ... ultimately replaced with a new PP 2000 plus by Damien) -- but in any regard, the hum was ca...
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Batteries are either designed for, or by default are better suited to, specific tasks/routines. Likewise, a given "smart" charger more or less suits a given battery. Caveat Emptor.Paul S...
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2) OUTPUT STUDY
I decided to check what my PP outputs. After some listening my HF is harsher than I would like plus on older equipment (like Sansui TUX1) I can sometimes hear a gentle transformer whistling, suggesting high harmon...
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He has mine now. Of course, I don't give a crap about the "power supply", since I am happy with the battery. And it's hard to imagine anything on my VERY basic unit getting further "simplified"; but bass is nice. We'll see.Paul S...
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I've tried a couple of transformer-based lights, but they made noise in my system; so I go back to cheap battery-based lamp (flashlight...). Of course, noise probably does not matter for CNC... While I'm dreaming, I'd like a quiet, ignorable plug-i...
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Yes, decoud, looking at it like this, it does seem like it would just be a matter of time, money, and some working electrical knowledge before one found an acceptable alternative. One bonus of the DIY route might be that it could incorporate a larger...
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Paul,I finally received my unit in February 2010. After installing it there was an immediate improvement to the sound of my system. I live in an apartment near downtown Boston. My playback varied from day to day. It proved to be very frustrating ...
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Romy,I looked at your Melq schematic : http://www.goodsoundclub.com/PDF/Melquiades_SET.pdf regarding the 6E5P bias. Would it be simpler to use two alkaline battery in place of R5 to provide 3V , or 3 Rechargeable for 3.6V in place of R5 ? Did you tr...
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If in the basement next to the failed Chevy Volt battery experiment and my fresh grave you had a massive flywheel spinning at a constant velocity powered by a motor attached to the grid and then used magnets embedded in the flywheel to regenerate the...
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I was thinking about the same but with delivery beginning just this summer and I read somewhere, at the point of the announcement, there are already a huge queue, will take a while before someone test it for audio purpose unless luckily an "audiophil...
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this weekend I plan on taking the cover off and giving my 2000 a good cleaning. its been almost 4 years and ive been getting some ac sounds at the speaker recently. I need to replace the battery as it has ran its life cycle. hoping this cleaning make...
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It's a newish device, the website reads intelligently, and "We’re so confident in the sonic benefits you’ll experience using Black Lightning Battery Power Supplies that we offer our 30-day money-back guarantee."http://www.redwineaudio.com/products/bl...
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Well, there is always a field for concern regarding the size and internal resistance of the battery. Relatively small power bateries do make negative impact. Another field for concern - musical quality of the mains power in Russia an...
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I would also like to know more about this behemoth than the "What is Best?" proclamation tells.Meanwhile, I keep thinking that another "all-out" approach might be much smaller, with discrete circuits and a large-enough battery (or batteries). Why no...
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Fremer reviewed the Monaco : http://stereophile.com/turntables/1107gp/FWIW I have greatly enjoyed the abilities of my direct drive turntable to negotiate complex passages of symphonic music. I assume it is because it is less sensitive to ...
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Hi Emanuele,FWIW, I've been disappointed with my PP2000 (the 230V model). I love the sound then it's running from battery, but think it totally destroys the sound when running under 'regenerator' mode. And as Romy has pointed out, this is totally una...
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[quote user="manisandher"]Romy, this is very interesting indeed. I'm assuming that the sonic difference between these two files is in line with the sonic difference you hear between bad and good 'electricity' days when you're just listening to music,...
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About this time last year I decided to stop using my PP2000. It has been sitting in my basement gathering dust all this time. I even put it up for sale last year but only received stupid offers for it, so decided to keep it.I've been having problems ...
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I have pretty well convinced myself that it is important to have a battery as an "active" element between the up and down converters. Of course, the PS units do without this, though I have not tried the newer ones in my own system. Obviously, a big,...
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[quote user="RF at Ona"]Romy and friends,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 t...
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[quote user="Bud"]Yes. Their is a direct correlation between surge current and dielectric materials dielectric constant. The voltages in question are high enough to use a thick dielectric material and just as with the effective resistance of the capa...
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Well I don't know for sure about nirvana but we need to keep remembering that we have comparisons of battery operated (AC disconnected) audio devices that provide a control or criterion of sorts as we do in cables with bypass devices. So the maximum ...
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hi RomyNice bias battery gimmick for the el-caps!But, i see the hardcore analogue teams are having a hard time with room modes and time alignment :)I wonder what it takes to admit one day that you can’t neglect DSP anymore, and just having so much ea...
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[quote user="Lx_"] The second sentence is my own conclusion. It was not my intention to imply that it is yours, sorry for the misunderstanding this may have caused. We both agree that PP can be sensitive to incoming AC. The context and circumstan...
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Well, I finally found and implemented a digital front end that I can live with. I have been so cynical about digital up to now that I have kept and used an old, cheap Sony player (albeit one actually made in Japan...) because up to now it seeme...
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[quote user="drdna"] It is not exactly correct. There is 60 Hz hum eliminated by lifting the ground to the amplifiers. The neutral is connected to the ground prong and chassis in the amps, so I assume it is setting up a loop. However, there is a seco...
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[quote
user="steverino"] Later after the PP battery was replaced hum disappeared
forever.
[/quote]
Interesting. What made you
to replace the battery? The reasons I ask is a because an old buttery would not
be different for powers supply then ...
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[quote user="joaco"]Hello all , i know this topic is almost about pp experience but since im experimenting with electricity i like to share some thoughts here . I builded a dac using very high quality components . As you know the power supply is crit...
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[quote user="Antonio J."]I suspect the APS does more or less the same that my friend proposed. It probably has a class D amp which makes some kind of PWM with a so so smoothing circuit, hence the tooth saw trace of the voltage line, some PS which pro...
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[quote user="Canuck"]Romy Do you plan on trying the new PurePower Plus and if so when? Maybe they should send you a loaner to try for a decade or so. [/quote] Canuck, I do not know. I am for sure would like to try it and I most probably will. I hav...
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