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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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perhaps you need a rig like this to run things from[IMG]http://i75.photobucket.com/albums/i318/murrayjohnson/Picture073.jpg[/IMG]...
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Like I said above, I planned from the start to try battery power just because John Wright recommended it, and it seemed like up to that point we were talking the same language, which was borne out when i listened to the unit as I received it.&nb...
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I would like to offers some thoughts about possible avenues for Pure Power 2000 improvements. Those thoughts are no specific to the recent November-December events and have broader generic implication. I initially intended to write it to Pure Po...
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More days came, with different electricity and it looks l like the PP2011 hold its stand – I did not detect a significant change in Sound so far. I gave a scoop plagued in the wall all time and I did not see so far a relation between the wave profile...
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Above, talking about APS-like regenerators, I was skeptically referred to the battery back up functionality in the APS PurePower, calling it bogus and completely unnecessary. It was very funny to read at the APS site as the APS guys promote their uni...
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I agree with your observations, and my own misgivings swirl around exactly the points you raise. In addition, I have tried battery phono stage and all it had to offer was quieter "background", everything else was worse, despite the wild and exo...
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Mats, believe me, I'd love to get off the frickin' grid altogether. But if I'm looking at >20 car batteries just for the K&K phono stage, then how many angels will fit on the head of a pin? Ironically, the K&K also uses JFETs.....
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Hello i was told by the shop that sold me my pp2000 that the unit was not designed for battery back up in normal operation. That battery back up was added only for cases of power lost. Ive had that happen only once in the time ive used the unit. Now ...
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The PurePower batteries provide power to the AC regeneration whenever it is required. That could be during a black out, it could be during a brownout, it could be for a fraction of a cycle it could be for 10 minutes. The simple fact is the incoming U...
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True enough, Romy, and who knows, there might be a day or a late night when it sounds no different or even better with the wall power. Meantime, there is just no down side to using the battery for the iDAT-44+, despite my bad experience with th...
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[quote user="be"]Could you tell a bit about how does this:
"I end up with 360V on B+, 15K plate load, grounded cathode, 160V on plate and -3.5V on grid via a series battery."
sound as compared to the normal Milq bias?[/quote]
I did the following. ...
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I remember there was a guy in Chicago (Chig?) who covered Bidat to battery power – I juts do not remember already what was his comments. Chig, if you still around then say Meow.
I personally do not believe in buttery powered DAC like Bidat (IDAT). B...
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Like I said above, I planned from the start to try battery power just because John Wright recommended it, and it seemed like up to that point we were talking the same language, which was borne out when i listened to the unit as I received it.&nb...
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[quote user="Lx_"] Indeed when the battery gets charged the sound is different from when it is charged. I have noticed this especially after the battery is discharged completely (after PP shuts itself down when running on battery). I think this i...
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Do you mean a battery bias , Brian ? We didn't try it because of 1 V bias voltage - I don't know if the battery with this voltage does exist . I know only 1,5 V and 1,2 V cells ...... maybe using some chemical reactions we can obtain 1 V or little le...
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Electricity was very good for the K&K/vinyl today so I again compared the battery power to wall power for the iDAT-44+. To make a long story short, the battery was still better in terms of music, including better focus, which does not come ...
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[quote user="manisandher"] So, the PP+3000 arrived... and went pretty much straight back.As soon as I switched the battery pack on, it started hissing and emitting a God-awful smell. I packed everything up and had it collected the next day. The r...
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It's kinda fun every now and then to try to figure out a BEP solution on my own. The following will illustrate why I don't do this very often...One problem that is very hard to deal with is efficiency, in the broadest sense. Without "hi-tech" compr...
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All switch mode power supplies that receive a CE, UL or CSA approval have complete isolation from the wall voltage, across the dielectric barriers of a transformer, from primaryto secondary.The isolation of noise occurs because the incoming wall ...
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[quote user="TonyB"]The differences between the battery operation and AC operation are to be expected.One case is isolated (hopefully) from AC, the other case is not. If anybody thinks otherwise,they are fooling themselves. [/quote] Tony, the fact is...
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Not sure now what the problem with battery power was earlier. It might have been a tiny dab of solder on the input adaptor. .. Whatever it was, it's gone now, and I am back to battery power!Basically, the recent mod makes far better sense with batt...
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[quote user="manisandher"]I'm happy to compare the new PP+3000 to my old PP2000 and share my findings.[/quote]So, the PP+3000 arrived... and went pretty much straight back.As soon as I switched the battery pack on, it started hissing and emitting a G...
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[quote user="drdna"]Remember I am not systematically anti-battery. I am anti-"pro-battery" which is to say I do not view it or anything else as a panacea. Each electrical device accomplishes a goal and degrades sound. The goal is to work within your ...
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[quote user="Romy the Cat"]The recent LX’s posts made me to think about the PP2000 buttery. He reports that his buttery got way weaken from 2009. I used my older PP2000 from December 2008 and my currant problematic “upgraded” problematic PP2000 used ...
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[quote user="Romy the Cat"]Those 3 new units had huge between butteries and AC.[/quote]I don't really want to share my thoughts on the sound of the PP2000 until my dedicated circiut is in place. But I will say that fed from my current utility line, t...
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Not sure now what the problem with battery power was earlier. It might have been a tiny dab of solder on the input adaptor. .. Whatever it was, it's gone now, and I am back to battery power!Basically, the recent mod makes far better sense with batt...
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[quote user="PurePower"]The obvious corollary of this statement is that if he can hear sonic effects in his music system that are directly correlated to appliance turn on, then his PurePower unit is almost certainly not operating normally.[/quote] We...
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I would say that nothing has changed since last night. The sound still a bit harder then I would like it to have. This hardness is very interesting and in way different, it is not type of the hardness that I would discard as “bad” attribute of sound ...
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[quote user="manisandher"] Also, when I switch from AC to battery, the output voltage (as measured by a true RMS voltmeter) INCREASES by between 3-4V. Now, I am NOT suggesting that this increase in voltage is causing the difference in SQ. However...
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[quote user="Romy the Cat"]In my estimation our playbacks running from averages electricity I have here in Boston operates at 3-5% of abstract sonic quality scale. Use of the devises like PP2000 moves the “quality” to perhaps no more then 10-15%. How...
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Copyright © Roman Bessnow 2004-2013
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