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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Thanks, Clark, I will go with regular commercial Romex. There is no such a thing as “specialty AC cable” and the thing that they write about their cable is crap in my estimation. “Our custom high-end Power AC In-wall cable is a 10 AWG (5.27 mm2), spe...
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[quote user="rowuk"]Alex, I have a APC RT UPS which is a regenerator and UPS in one. I use it for on site recording as you never know what you get from the wall socket. Dimmed lights, PA and all sorts of other devices like air conditioning and refrig...
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I feel that shielding of dedicated power lines is kind of arguable
subject. First of it I do not know if it is necessary. What will you shield
from? The main point is what kind shielding
and how it affects sound. It might be shielding
that is i...
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We do have a cable thread somewhere on this site that might be better for cable-specific posts. As far as purely electrical "issues", in the end, better sound is still the main consideration. Shielding power lines is not only very difficult to do, i...
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[quote user="rowuk"]We really do not need reports of voodoo or a last wet dream. If you want to be taken seriously, describe the test procedure and outcome of each test. What does „better bass“ mean in this context? [/quote]Rowukif you have Pure Powe...
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When I use Pure Power then I hear no noise/buzz from Big transformers of Power amplifier.It seemd Pure Power 3000 blocks DC .I have no device for measuring DC voltage of AC line.I did not use any DC blocker before Pure Power and I have no idea about ...
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[quote user="RF at Ona"]Romy and friends,Reading about the sensitivity of your system to electrical power supply problems reminds me of the days when I used to make my own equipment as much for the learning experience as for the final result.One of t...
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A bit of the background. Before acquiring the PP, the whole system had been moved from it's previous location in Gdansk to a new one in Warsaw. New, busy city, new apartment, new electricity. Straight after the move and connected to the new house...
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[quote user="Paul S"]fiogf49gjkf0dWe do have a cable thread somewhere on this site that might be better for cable-specific posts. As far as purely electrical "issues", in the end, better sound is still the main consideration. Shielding power lines i...
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Romy,Try wrapping a copper wire around a power cable, then "inject" it into the power line through an isolation transformer. The wrapping only to help defeat the antenna event of other signal sources that only have one vector.et all,For cables, the m...
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It looks good to me. As you can see I have left plenty of room to add a couple of more channels.The bottom level contains the power transformers and relays. The diode bridges hang from the the middle shelf and the chokes and filters are on the top ...
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[quote user="Romy the Cat"]Hm, this is interesting. I my case nether neither CEC nor Bidat affect other of the tuners. Lavrys do but not Bidat. Try to put ferrite on ALL Sansui inputs: antenna, power cord, output cables. I have 3 bids on each leg of ...
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[quote user="Antonio J."]So I thought my tuner weren't properly adjusted. It has not been serviced nor recently aligned, I have no proficient technicians around who I depend to let them put their hands into the tuner. The damn thing always ...
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This subject is interesting but unfortunately there are more options then time in life to experiment with all of them. The idea to use fatter cable is right atop of surface. It is not about current caring but the lower impedance of the cable. Remembe...
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1) GND NOISE
After more experiments, I can proclaim a victory over the 100Hz noise on my End of life phono. For whatever reason the GND connection does not want to run in a close physical proximity of the line and n...
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I just had a conversation with the guy who runs this JPS Lab. I did anticipate much more idiotic presentation, similar to what they have at their web site. To my surprise the gay was rational. It is not that I agree with all that he was saying but it...
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Yeah, the power cord was nothing special. The Shunyata cord PLUS the Hyrdra conditioner represent the single best upgrades to my system aside from John's mods. I was skeptical about power cords and conditioners, but I'm a bit of a fanatic a...
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Hi All,Can anyone please help me with this?I have a client who has a Lavry Da924 and someone before him has heavily modified the power supply board.Could someone please help me identify the 4 requlators in the picture along with the power supply boar...
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I can only offer a simple solution to this problem.Decide on which row you wish to place digital services. I would also include anything that has a switched mode power supply because of the Y capacitor thing. Assume Row 1 will be used for digital s...
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...I recommend you take notes as you proceed.Also you might consider running specialty AC cable (not Romex), to wit this item from JPS Labs:Power AC In-Wall CableThe first high-end power cable for home or professional dedicated AC wiring. Dramatic im...
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[quote user="Romy the Cat"]I got my last PP2000, after the repair was done. My second new unit works since I got it repaired; it runs the whole playback, sounding very well and my attempts to add a second PP2000 led, as I described to worsening o...
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Jessie,
Actually the tendency of manufactures to isolate ground becomes almost common among any more or less serious manufactures nowadays. The main’s ground is so polluted in US hat it is scare… or even dungarees. I remember a few years ago when I...
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[quote user="KOTriode"]It's 60Hz hum, caused by both mechanical and magnetic field coupling to the output transformer. I used a toroidal transformer and thought it would not caused this problem but it did. When using an external power supply for ...
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drdna wrote :"...What was more concerning is today some 60 Hz hum also re-emerged in the system... As everything is plugged into the PP2000, I am not sure how to deal with it..."Before opening up AC outlets and breaker boxes, here's a way of disconne...
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This is very ugly topic as I have been looking a solution for years and I do not have a consensus with myself regarding this. I have 21 AC power consumers in my playback. Well, the 21 that require good power, another 8 might be plugged to the utility...
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I’d like to post some information about my own experiences with the new PurePower+ 2000 unit, and the customer service (or lack thereof) experienced under the new regime, so that people can be advised. I ordered and paid for my unit in October last ...
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[quote user="rowuk"]In live music, we have intermodulation. Two trumpets or a trumpet and oboe playing together create sum and difference tones that change depending on pitch interval for instance. For music in major keys, this intermodulation is add...
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...to obsess about speaker wire. Thinking about this a little more I realise that my preference for foil cables has always been in relation to speakers with passive crossovers. DSET is much more simple, the amplifier is driving the transducer direc...
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Thanks for the advice Romy.But actually, I may not need new tweeters after all (for the time being, at least, until the dreaded 'Autumn Sound' arrives).You see, when I connected them up, I didn't really think too carefully about the speaker...
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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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