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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Joaco, all this will probably be moved back to the "Electricity" thread, which is not really an APS Forum, as it has appeared for a while, now.No one supposes that other alternatives do not exist; it is rather just a case where everthing has not yet ...
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A few post above Bill mentioned that he run his PP2000 from AdeptResponse power conditioner. I am not familiar if AdeptResponse helps to separate one PP2000 effect another. I am not also familiar with AdeptResponse itself. Looking it up it appears t...
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One of the reasons I no longer use a tube tester. They make a measurement at a specific target operating point(s). You don't really know what it is, so what are the chances they will be close to your actual circuit operating point? So choosing a clo...
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I chose the 170V point as midway between the 250V supply I had for the CCS plate load. The choice was for maximal signal swing in both directions. [quote]in a properly designed amplifier a transformer should clip before the active stages[...
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@
montesquieu yes , the informations are from Silvio , this is the full text ??
Some
technical information regarding the different versions o...
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Very interesting… Earl Geddes just posted his thoughts for the Morons at the AA. I do not know is he was inspired by my post of by the completely foolish nose that the AA’s idiots razed around the Cogent’s Steve and Rich experiments but still – it wa...
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Paul. GSC = goodsoundclub I have worked with Richard (pure power owner) and i know the problems of customers but i think paypal is a good way to shop from Richard. Ask Richard to send you video from the unit before paying to him. Recently 3 or 4 pure...
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Stringreen, what an interesting series of posts. I generally enjoy musicians' takes on hi-fi, especially as these relate to sound (versus music). In all performances there are so many things to listen for and to. What I have mo...
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As a new concert season is coming up with BSO opening night next week I was sprucing up my recording studio. The machine is 3MHz with 2G memory – plenty run SoundLab5. The SoundLab just record and play, I do absolutely nothing else in this software, ...
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Never had a 100kg power supply to play with, but I have certainly noticed that changing the power source affects dynamics (along with plenty of other things, too). I prefer my friend's system's dymanics when "grid power" is connected, vs giant batter...
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Paul, don't get me wrong--normally I'm not choosing a tube by the power, but this situation is somehow special.There are very few tubes which have the right electrical parameters (gm, mu, power, etc) to start with. In thesmall tubes word one can glaz...
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Decoud, this is a delayed response to your most recent post in this thread (posted 11-14-11): Indeed, why is it "beneficial" to add DC/AC to a battery only to rectify it again? This has never made sense to me, except with my fuzzy "theory" that the P...
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[quote user="thrang"]I will take what you've posted back to Purepower/Wyred. Excure my ignorance, but are you saying the manner in which the Wyred's draw power might, in higher volume listening scenarios, exceed the capacity of the 2000? Or by droppi...
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I had some free time which I'd decided to waste with this "project".For some unknown to me reason (I'm an idiot when it comes to filters)the Sallen Key topology needed one more 12AX7 stage, unlikeI happily drew some posts ago. The resulting SPICE'd p...
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I've had a new PurePower APS 2000+ unit for just over 5 months and recently the battery will not charge. After Damian of PurePowerAPS helped diagnose the problem they said they would do a call pick-up to send back to the factory in Canada for rep...
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Adrian, the more I read on the subject, the more it looks like the "universal" approach to solving power problems is a notion only consumers would swallow.As for "the difference in the power supply design" between your amps and Romy's making a differ...
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Paul, Please be careful here because good ol' USA is quite different when using residential pole mounted feeder transformers.What you may have is a neutral wire coming off of the 0 volts tap of the 120-0-120 secondary. This center tap is connected ...
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Scott, Do not pay any attention to the moron advice given on the Audio Asylum. The issue is not with the quantity of the power you have, it is with the quality of power you have. Genn makes some very good points. Most circuits...
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[quote user="rowuk"]Do we simply not want a non-changing target? As regeneration does not seem to be „the“ solution (especially if the AC cord behind the regenerator changes bass), what does better AC even mean?Perhaps the designers of great equipmen...
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Just finished one mono block 6C33C SE amp.To keep things simple (power supply only need 220V), I used a single driver tube (the second tube is there for backup if not going as planned) through an interstage transformer...
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Due to this thread, I called the friend upon whose boat I heard the Vox Olympian in order to find out precisely which DCS DAC he was using with his TLOX to get the sound that I found so remarkable. It turns out that whilst the DCS unit was indeed pre...
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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 probably is a swit...
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I wish it would be true and I would be busy to build my loudspeakers. Unfortunately it is a lot of work and I did not have even time to look at my site. The r22, the power resistor is not necessary the one which mitigate voltage in your tube....
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To my big surprise the Pacific tuned out to be an absolutely wonderful 16-bit DAC - the only one that migh compete with by Bidat. It does not go into max weigh of lowest end as some other best converters do but it has such an interesting and reach “e...
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This question had a second bottom so to say. In reality I was not seeking any suggestion: crocodile clipended leads and the chokes are bybassed in few seconds on the fly. Ripping the filters of would be another few minutes. I do have some spirit of a...
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Last year I had the chance to listen to the Vitus SP-102 Phono Stage. When I remember right, it was ok, some of the better modern Phono Designs. It wasn't as thin and dead as Pass Phono for example, but it was also not able to go out of the way in re...
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I think what actually happens it that the dielectric, when it gets most fully discharged, simply takes some time again to get 'FULLY' recharged. The perode inbetween will make the loss angle (or power factor) become a lot worse. This means the caps' ...
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[quote user="jessie.dazzle"]As a way of forcing myself to see the thing as a whole, I will start by converting this schematic to a 3D CAD model, illustrating each component and its relation to the others (with more distance between the parts than in ...
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I regularly visit 6moons News Section that lately became quite good sources for audio news. It is same that Srajan not willing to share the news in RSS or compatible format, anyhow…
The today new is Elina Lamm announces that "we are extremely please...
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Well, I have post able a number of articles about different aspects of Purepower 2000 operation and sound. I could make a few more but I think it is enough for now. I would like to drop a few general observation and conclusion.
It was a good sign th...
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