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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="Romy the Cat"]PP has the ultimate tool that allows detecting a LOT about its operation. Do you observe the same behavior as you describe when you pull out the power cord and let the unit to run from internal battery?[/quote]I made experi...
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[quote user="Romy the Cat"]... if it cost nothing to you and if you initially wanted to try PP3000+ then I do not know how that misfortune you had did changed your mind.[/quote]Well let's just say that I find the retailer's version of events difficul...
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Paul, perhaps I did not understand your posts correctly, but observing your battery obsession throught the time I cannot get one thing: why the freak you are hooked up to the idea of a small, neat battery powered phonostage so much that you start to ...
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[quote user="deemon"]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 ob...
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While I am very cynical about any PS "protecting the unit from bad AC", I do think a PS can be "better" or "worse" in practical terms. In other words, not all PS are created equal as they affect/effect Sound. It may well be that my iDAT has a c...
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It seems the pure power 3000 diagram is like below :The battery voltage in new pure power+3000 is 72v (6x12v in 230v version) and the battery voltage convert to 330v by a switching dc to dc converter if i am not mistaken.What is your idea if we remov...
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[quote user="david82"]I purchased a PurePower 2000 many years ago and it worked fine, but I decided to sell it as I switched to a different power conditioning solution. I sold the unit to someone, and he claimed it would not work on battery backup. A...
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what does your inverter require from the battery (in terms of both voltage and current) to put out it's own rated AC voltage and current? It seems like one would want to know this and take it into account before purchasing a battery for the inverter,...
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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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And I wish I had looked more carefully before taking the cheap way out - which turns out to have become the more expensive way since I have no idea if anyone will buy a month old used battery.From the graphs the traditional lead acid batteries all pe...
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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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I am sorry I do not want to pollute the PP2000 thread with battery options.Right now I am in the process of testing a lot of different comercial amps to see what I will stay with, or which route I will be taking with my system in the near future for ...
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Exactly, Romy. Also, it is not so easy to come up with an alternative where the charger keeps up with the battery drain! But because I have a short memory I have been wondering again about taking one's time to charge the battery (or, batteries).One...
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[quote user="PurePower"]Without its own source of power it would be impossible to truly isolate the PurePower output from the incoming utility power. That is why there is no difference in sound when the PurePwoer is on battery or it is on utility sup...
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[quote user="PurePower"]I'm sorry if my post seemed to be directed at your acoustic noise issue. It was meant to reply to 2 other postings that simply asked if the battery only turned on in a blackout and whether there was a difference in the audio s...
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In my unit there is definately a change in sound running from wall from early in the day to late evening. In the late evening being the better. Before the Purepower this was much more noticeable but to quantify it, the worse day with the Purepower is...
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[quote user="Paul S"]I suppose there are the usual strong strictures against it, but has anyone tried lifting the (3rd wire) ground only during wall-powered operation? Best results, whatever that might mean, would require a "dedicated home run" for ...
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Another thing to think about along with larger batteries for the PP is the charging process, which needs to be "shaped" to make best use of the particular battery or batteries, including maximizing battery life. Also, if the stock PP2000 uses se...
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[quote user="Romy the Cat"]Rakesh,I think you’ve missed the accent of my battery post. We do not argue abstract topologies but we argue the validity of topology in respect to sonic results. I hope we all agree that we do not exactly know WHY affect...
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If I say that it was horrible with San Audio 2A3 driven with buttery biased 6E5P then I really meant it. I got home today tune it on and it was so bad that decided that it shell not use it as is. Even though it an experimental amps but still it...
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I have a long story about battery output and life not coming close to manufacturer's promises, but I will not tell it. Suffice to say, it may well be that you have a defective battery, as it happens all the time; or, it may be that your batteries do...
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With the rapidly increasing technology driven by the electric car industry, lithium cell battery prices have come down. Tesla is now offering battery units for home use that can provide continuous AC power from an isolated battery source for as littl...
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... then I feel it needs to be addressed not shielded cables but by searching the source of it. if it is the case then I'm pretty sure that somewhere in battery charging circuitry there is some kind of pulse transformer or any other magnetic dispersi...
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PP is a toy compared to what is needed.A. Buy a damn Chevy Volt.B. Carefully remove the beautiful battery and it's 115v 60Hz AC charging system.C. Install in the battery in your basement and connect it to a DC --> 115v 60Hz AC generator.D. 40 mile...
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Romy:You may in the meantime build your own battery pack to increase the playtime you get from batteries. When I last spoke to PurePower (I placed an order for a PP2000 in another life and then cancelled the order), I asked whether they would pro...
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I don't have a scope, so can't measure the output of my particular unit. However, if I were to guess, I would say that my unit probably falls alongside your #2 unit. When run from AC, the bass disappears and the sound becomes bright and edgy, to the ...
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Hi AdrianI'm sorry if my post seemed to be directed at your acoustic noise issue. It was meant to reply to 2 other postings that simply asked if the battery only turned on in a blackout and whether there was a difference in the audio system performan...
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Sounds to me like your switch mode transformer is doing the buzzing. I recently purchased an APC product that charged the battery constantly, so long as it was plugged in. This caused quite a bit of heat and stench, from the hot switch mode power sup...
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Dear Romy,Thanks for the information that the sinewave form is only generated when the battery power takes over. The pdf is a good article. I did more research today and located a schematic which backs up what you have said despite t...
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Jumping the bridge would only get one the PP's "pure" DC (I hope...), and the question that churns in my mind is, how does the PP's DC/AC converter not mess up the sound? Yes, there will likely be switching noise, and it is also quite likely tha...
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