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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Almost all such hum finds its way into your audio signal path through a ground loop, although it is technically possible for AC 50/60 cycle hum to enter from adjacent unshielded power cables. Make sure the AC cable to the phono is well shielded and i...
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We still maintain that the output is totally isolated from the input AC - which after all is the reason for a battery pack - to make sure the DC bus is always stable. We have done tests again and again in which we switch from battery to utility and...
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You can rest assured we did not make electronic design changes. We added new casework and a set of feature options from customer wish lists. One of the more significant is the availability of LiFePo4 batteries. They do provide higher discharge rate...
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Romy, I prefer you think us idiots than reveal the secret sauce to a man that wants to publish it to the world. But I have decided not to take it with me and a detailed technical explanation is safe with my executor and I bequeath it to you....
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Romy,
If
you didn't have children I'd suggest a new forum topic devoted to solar power
quality and Audio.
There
are lots of technical papers on solar inverter output quality, especially
related to harmonic dist...
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The situation reported has been presented unfairly we believe and includes completely false information regarding PurePower. We were working to solve a problem with a PurePower installation in California for over a year providing three replacemen...
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Dear Don C
A few facts you are missing, and a libelous statement that need correcting.
The PurePower product was designed and manufactured in Canada starting in 2003 by Audiophile APS Inc., years before any production was outsourced to Taiwan. ...
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Hi Dr
Most of the dealers listed on the Chinese Ppowerus page are not actually selling the counterfeit units and several have asked to be removed from the list without response. None of the US listings are real.
In fact, because the Chinese com...
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The electrical performance should be identical to the Schuko. Email me at richard@purepoweraps.com for details....
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The Hubble NEMA 5-15R duplex receptacles do not fit in the modular Schuko mounting space. You can either purchase a new back assembly already pre-wired with US style receptacles or we can supply much more cost effectively a modular Nema 5-15R recept...
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Hi Adrian,There is a bit of a misconception, here. Please let me clear it up.All North American 120 volt PurePower models including the 1500, 2000 and 3000, are available either from stock or with no more than a one week ship date and have been throu...
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HiFi store in the Czech Republic is an excellent, knowledgeable dealer and more than reputable. PurePower did have a 3 week shipping delay in December for the 3000 while we resolved a parts quality problem from a vendor. The engineering delay was exa...
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We did not intend bypass mode to be used as an energy saving technique - but Romy is correct - it can do that. However if the units is on standby with no load (all components off) the power usage is between 7 and 15 watts and obviously switching to b...
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We are very happy that in spite of your wishes for specific features, the new PurePower+ units are performing in your system the way we intended.You may find the appearance of the voltage sine wave a little less elegant, but is a small compromise f...
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Hi ManiThe UK 240 volt utility system does not parallel the North American 120 volt system - and is also quite different from the North American 240 volt scheme used for household stoves and dryers that uses split phase 120 volt legs to present a 2...
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Hi George,We did find an email response from Damian to you in early 2010, suggesting that we could think of no technical reason that a PurePower unit would have a problem with +/- 60 volt input. We routinely operate our 230 volt models with two phase...
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Hi Adrian,We look forward to your receipt of a shiny new PurePower+ 3000 as much as you do. You are one of about a dozen customers who had our previous 2nd generation units in need of repair under warranty.We had, for obvious reasons, severed our re...
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[quote user="SOS "]What about this issue of humming, this is a reoccurring theme that has not been addressed. Even my own 2000+ unit I sold to a gentleman that owned an original 2000 unit who said he would be able to figure the issue out had the humm...
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[quote user="Paul S"]... there really is no "affordable" universal solution to AC power correction from an electrical standpoint, especially not for hi-fi, where amplifier topology might be just about anything, and these amps might be running ri...
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In late December hifigirlgeek reported an error
message on the display of her PurePower+ that indicated our diagnostic system
had detected an overtemp reading, which caused the PurePower unit to go into protective shut down.
...
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PurePower is always happy to answer reasonable questions on this forum. Especially if the inquiries are provided in a spirit of advancing the discussion of the topic. It appears there are an awful lot of misconceptions about PurePower+ models vs the...
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I want to let Paul S know that if he found our QC to be not up to his standards in the past, that he give us a second look. Many of our response timing issues of the past few years were the result of time delays between our Canadian personnel and our...
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I am sorry that Steve is unhappy with the inability of PurePower tech support to resolve his phono hum. It is not because we did not provide adequate support. We brought the unit back to our plant and gave it as thorough a series of QC tests as possi...
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Hi Steve,This seems like a pretty simple problem. I'd be happy to straighten it out.It only takes a day to repair a PurePower+ 2000 and in your case it only takes UPS a day and about $19 to ship from your home to our pickup depot in Niagara Falls NY....
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We recommend strongly every PurePower 2000 be supplied from its own dedicated 20 amp isolated ground receptacle. For 2 units it is preferable that each will be separately wired directly back to the main panel, and if possible fed from the opposite sp...
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I think it might help LX_ 's ac problem resolution if I make one simple point.If his PurePower 2000 is operating normally, it is both theoretically and in practice impossible for his household appliance operation to have any effect at all on the AC o...
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I'm happy that I found out about LX_'s problem in France with his PurePower 2000 230 volt model. I'm sorry we had to hear about it on Romy's forum so long after the fact because his problems would have been solved long ago. Unfortunately his dealer w...
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LX_'s ground noise needs to be addressed - he should not have to put up with refrigerators and air conditioners interfering with his listening. However, it is important to understand that the solution to ground issues will have to be found in the hou...
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The PurePower 2000 claimed efficiency is in fact equal to or greater than 85%. Our 89% rating was published before we added the 2000 model so I will correct it immediately. The energy losses from efficiency are mostly expended in heat - and so cannot...
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