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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="manisandher"]This is very disappointing to hear.
But in a way, it makes little difference to me. I had decided that I would only use the PP2000 from battery power when listening to music (or making vinyl transfers to digital). I'v...
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The information is almost certainly "out there" already, so it's really "just" a matter of rounding it up. And I disagree that power supplies remain a mystery; it's more like our idea of critical listening seldom factors in during "development". Wi...
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Paul, I'm happy to compare the new PP+3000 to my old PP2000 and share my findings. The new unit has arrived in the UK from Canada and should be at my place this Friday.It's true, I didn't particularly like the sound of the PP2000 running from its reg...
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I followed exactly Romy's advice. I disconnected EVERYTHING from PP1500 apart from the Endoflife phono. The phono output was monitored via RTA software on a battery powered laptop. There was only phono connected to the PP. [I don't have GND loop...
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[quote user="manisandher"] eli8888 wrote:The 3rd party, who is an official distributor of the product for Europe is telling me he will prepay me as soon as pure power send them the money they paid back. This was agreed with PurePower and the distribu...
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[quote user="Paul S"]Back to APS troubles, I can't help but think that some plain, old-fashioned, forthright honesty would go a long way. I recently read some posts from an APS wonk claiming outright to an HT group that there is absolutely no di...
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Somebody from AA was asking about electromagnet. The subject pup up here from time to time but this time Bruce Edgar uploaded an interesting comment. Bruce is not a typical AA Moron and if he says “inaccurate things” then it is not due to ignoran...
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It took a LOT of time in CAD using what I had learnt from building the power supplies and then adapting it to match the requirements of the rest of the system. I have decided to mount the DSET on the horn stack and direct connect the speaker cables....
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Adrian Thank you for helpI think i should 100% agree youDid you compared class ab vs class a power amp when you connect them to pp3000?xandcgI have read about romy experience with paralleling capacitor with battery but it seems it does not help .I ha...
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The noise problem in pp is not related to audio system ground and lifting ground will not make it silent.The only way you could get silent pp is to unplug it from the wall.I have heard (in this topic before page 44) the battery charger in pp is cause...
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Et Voila! Perfect sound forever.I am ready for a subwoofer sized battery pack by the house electrical service feeding the audio dedicated lines. Whats wrong with this solution? It doesn't exist yet? Heck, $15k in the grand scheme of things...Steve...
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Mani, I did find it was strange that you were getting from insulation transformer better result then from PP2000. They are very different devises with very different results. The difference is like to play a CD from an audio output of a consumer $50 ...
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This reminds me. Back in the days, twenty years ago, when we were experimenting with small portable players like the 3400 -- we found they sounded best with a quality battery shunted with capacitors. We used oil types. The results were better than al...
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I certainly have my hands full with those dams PP2000. As I least last night UPS lost one of my units I send to PurePower to repair. The shipment was insured but the saddest part is that it was the best sounding PP2000 of mine. So, I will not be get...
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Another noteworthy effort might be the battery operated, solid state amplifiers with input and output transformers from Serge at www.audio-consulting.ch , available with copper windings. I keep thinking this might be good for Paul in his ...
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After seeing Paul's recent lament that classical records are getting harder and harder to find, I noted that I listen to only a small portion of my collection. I have my favorites, but I wondered about everyone else.What are your favorite performance...
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[quote user="Romy the Cat"]So, you feel that high voltage filedcoil do excite the electromagnets driver somehow?[/quote]I will not call this exitation, let say it dynamic stability.[quote user="Romy the Cat"]What voltage you feel is appropriate?[/quo...
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Adrian, can you confirm whether you were using cable with shielding or without? Like you I had the buzzing go away when on battery or without PP2000 in system. It became dead silent. Then with PP2000 back in system there was buzzing. I went to all sh...
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[quote user="manisandher"] So why do I now prefer the sound with the PP2000 as opposed to last year when I stopped using it? I think it's because last year I never plugged all the components into it. Playing around with various configurations the...
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Hi!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?Thanksbe...
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Well, that does not tell what sort of power your inverter wants/draws when you hook it up to your hi-fi, though it seeems like that is what you'd want to know in order to calculate how long you can listen with a given battery.Paul S...
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Hello !I have a question for the APS users regarding the unit's operation...Is the battery system an ACTIVE component of the double conversion process (AC - DC - AC) or is there just for back-up purposes in the case of a blackout event ?In other ...
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Not sure if SLA batteries can be charged and used at the same time. After all there are just two wires connected to the battery and voltage will either flow to or from the batteries. Not 100% sure about this but I think it's right....
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Hello Romy a long time visitor now a member. I have always been interested in what improvements can be made to my incoming power. I use a BPT 2, PS noise harvesters and quite lines through out the house. My system has always had very good sound...
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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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I used a cheat plug to lift the ground but that did not help. What helped was either unplugging the unit from the wall or turning off the breaker to run from battery. The noise does not fluctuate with volume or source. Ill take some...
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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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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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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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Robin, I think there are quite a few audiophiles in SE Asia who use fairly large and/or complex battery "back-up" systems, and I'll bet some just go ahead and use battery power for listening, or this is effectively what they do. As far as research o...
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