It takes a physically large box to contain an effective power line filter. A line cord is not a filter. And because it's construction is rather similar to a Cat5 pair it better not be a filter at all.
IME you can always measure a change, for instance, the 50th harmonic of the mains goes from -80dB to -80.5dB. I don't think this leads to any productive conclusions.
These threads are like dropping little surprises to attract the flies.
EDIT - I forgot to mention you do need to move the mains cord around to different positions with respect to the wiring in your walls, if things change then all measurements should be questioned.
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It might be a matter of semantics, but a line cord (mains cable) can work as a filter, or did you mean something different?
You can beat gordon rankin's from sound practices:
Power Cord Plus The good stuff for your AC interface. Article by Gordon Rankin, Wavelength Audio Sound Practices Magazine Online
When I've built a nice project and its passed a few month's break in and is way more than tolerable, i' make once of these to top it off. Its added clarity to my: His 'majesties noise' phono stage, Alan wright's FVP - the last version, Parabee's and subsequent mods, mono bugles, Pete Millets's HA-2, and the speed controller for my garry-401 and i will probably make on for the DAC thats going thru the paces now. Man, there is a lot sh)(&*^) in the line these days, and the 4-5 feet of shielded quiet seems to clear a good part of it out. Coming up fast on my list of to do projects is an isolation/regenerate AC power supply for my whole system, this is the only way I can imagine doing better what these power cords do.
Power Cord Plus The good stuff for your AC interface. Article by Gordon Rankin, Wavelength Audio Sound Practices Magazine Online
When I've built a nice project and its passed a few month's break in and is way more than tolerable, i' make once of these to top it off. Its added clarity to my: His 'majesties noise' phono stage, Alan wright's FVP - the last version, Parabee's and subsequent mods, mono bugles, Pete Millets's HA-2, and the speed controller for my garry-401 and i will probably make on for the DAC thats going thru the paces now. Man, there is a lot sh)(&*^) in the line these days, and the 4-5 feet of shielded quiet seems to clear a good part of it out. Coming up fast on my list of to do projects is an isolation/regenerate AC power supply for my whole system, this is the only way I can imagine doing better what these power cords do.
Sorry I added an edit if the measurements are not one dimensional (i.e. the measurement depends on the position in space of the DUT) the problem is much more complex. With power cords and IC's this is often easily observable.
No, it just has to be 1.7m (or a multiple thereof) long!
Black Rhodium STREAM: A Power Cable, riding the wavelength - The Audiophile Man
No I meant as a filter.
A filter is a circuit that reduces a problematic frequency by a reasonable amount.
This is funny only 3 orders of magnitude off. Meters for kilometers should someone tell them?
Excuse me that makes more sense.
BTW does that mean you have to stretch them out straight between devices????
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Three orders..pffft
Had two diodes fail. Three inches in diameter each. Silicon brazed to a .090 thick molybdenum disc. Failed at 6300 amps, 4.5 kelvin.
Used a laser scriber to cut then into 125 dice .2 inches sq. Probed them to map vf. Put together a setup to keep errors to 100 microvolts during probing, didn't want heating to cause drift.
Radiation damage caused vf increase. Rad source was one inch from edge, so line source rads caused huge vf gradient.
Expecting .770 millivolts +/- 100 microvolts..what was I thinkin???
4.2 volts close to beam, 1.8 volts 2 inches away.
3 orders...pffft
Jn
There will be papers written, big time stuff.
I don't care.
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Excuse me that makes more sense.
BTW does that mean you have to stretch them out straight between devices????
It seems to make sense if you're a Connie Francis fan!
By buying a 3.4m length you can lay it in a curve, while insuring that the straight line distance between power outlet and device is 1.7m!
It seems to make sense if you're a Connie Francis fan!
By buying a 3.4m length you can lay it in a curve, while insuring that the straight line distance between power outlet and device is 1.7m!
Ok. I give up...
Connie Francis??
Jn
A Connie Francis pressing was used in the review of the mains cable!
Black Rhodium STREAM: A Power Cable, riding the wavelength - The Audiophile Man
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