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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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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="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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...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="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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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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Romy,Try running the left and right signals from the stereo arms, one at a time, into the known-good mono phonocorrector. If the problem is not present then you know the stereo corrector is to blame.Are both left and right channels in the stereo cor...
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I think this topic is very very interesting to me and it is a opportunity those 90% audiophiles (like josh) think more about their objectives .I have pointed it many times in my weblog that romy recommendations (both methods and components) can not h...
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[quote user="Amir"]fiogf49gjkf0dfi guess the problem come from usb cable. these designers like AC Conditioner designers just kill dynamics. they remove noise but then kill the dynamic.[/quote]the dynamic increased after power cord break-in and using ...
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[quote user="Lx_"] The second sentence is my own conclusion. It was not my intention to imply that it is yours, sorry for the misunderstanding this may have caused. We both agree that PP can be sensitive to incoming AC. The context and circumstan...
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[quote user="JJ Triode"]Romy,Try running the left and right signals from the stereo arms, one at a time, into the known-good mono phonocorrector. If the problem is not present then you know the stereo corrector is to blame.Are both left and right ch...
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Paul S wrote (originally posted in the thread discussing noise cancellation for Romy's HP servers)http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=12957#12957"...Jessie, are you saying that the RAID system is "quiet" with respect to regular o...
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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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I think it needed to be expended what I mean by “new smart layout of the power cables”. What you run a large system than you have many circumstances when power cables cross signal cables. Not only that. The PDO cables are liquid filled and they do no...
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Dear Romy, I'm not surprised at your disappointing results as I have experienced the same with a variety of power filtration or generating devices. Your surmise is correct that such devices work much more easily with AV equipment or computers than t...
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It has been 1 year since I started working with the ML2s with all new tubes installed. The ML2s have been, by far, the biggest step I have taken in hi-fi in 45 years, and the "upgrades" I have done since the ML2s have necessarily been in a...
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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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[quote user="steverino"] I'm not surprised at your disappointing results as I have experienced the same with a variety of power filtration or generating devices. Your surmise is correct that such devices work much more easily with AV equipment or com...
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[quote user="rowuk"]The whole idea of an earth wire is a path to ground if something fails in the unit. In most countries the (metal) case is attached to this pin on the power connector.It is incredibly stupid (and in many countries illegal) to lift ...
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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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Thanks all for the replies! Looks like a very risky business.Given the work involved and highly unsure effect, I'll happily skip the shielding. Your comments suggest that the high capacitance line to ground (which the shield would happily provide) is...
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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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[quote user="drdna"] It is not exactly correct. There is 60 Hz hum eliminated by lifting the ground to the amplifiers. The neutral is connected to the ground prong and chassis in the amps, so I assume it is setting up a loop. However, there is a seco...
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[quote user="JOHNR"]One of the things that I picked up in this thread is the fact that if you use 2 PSUs in series, the sound degrades.This is typical of one unit generating common mode noise and this adds to that produced by the second unit.Even if ...
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[quote user="JOHNR"]One of the things that I picked up in this thread is the fact that if you use 2 PSUs in series, the sound degrades.This is typical of one unit generating common mode noise and this adds to that produced by the second unit.Even if ...
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This evening I took myself to performing additional tests with the entire system completely disconnected from utility ground. Following Romy's considerations about different grounds, and Richard's absolute belief in the capacity of a properly working...
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