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Post by iceman16 on Sept 18, 2020 17:53:09 GMT
I also have some diy mains cable. I use Viablue X25 and X40. Very well made and shielded from Germany. The mains plugs and IEC I use are Furutech + SR fuse.
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Post by Deleted on Sept 18, 2020 17:57:48 GMT
They would be no use to me. I live in France, and history says that nothing can shield France from Germany.
(I’ll get my coat....)
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Bigman80
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Post by Bigman80 on Sept 18, 2020 18:05:48 GMT
I also have some diy mains cable. I use Viablue X25 and X40. Very well made and shielded from Germany. The mains plugs and IEC I use are Furutech + SR fuse. See, I looked into Viable before, but when they claimed their speaker cables separated the frequencies being carried through the cable, I decided they were mad as a box of badgers. |
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Bigman80
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Post by Bigman80 on Sept 18, 2020 18:37:04 GMT
Have a chat to Mr Brook, and see if he will let you trial one of these, already made? linkHad a chat, he said - "no." That'll be that then. No surprise really lol. |
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Post by iceman16 on Sept 18, 2020 18:48:18 GMT
I also have some diy mains cable. I use Viablue X25 and X40. Very well made and shielded from Germany. The mains plugs and IEC I use are Furutech + SR fuse. See, I looked into Viable before, but when they claimed their speaker cables separated the frequencies being carried through the cable, I decided they were mad as a box of badgers. I have no experience with their speaker cable. |
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Post by Deleted on Sept 18, 2020 18:57:02 GMT
Have a chat to Mr Brook, and see if he will let you trial one of these, already made? linkHad a chat, he said - "no." That'll be that then. No surprise really lol. That is surprising. He has sent me stuff I never asked for before. Obviously I had to send it back. |
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Bigman80
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Post by Bigman80 on Sept 18, 2020 19:43:49 GMT
Had a chat, he said - "no." That'll be that then. No surprise really lol. That is surprising. He has sent me stuff I never asked for before. Obviously I had to send it back. Well, it's not really a surprise is it?. He knows I won't buy one, and I'll likely try anf build something as good for less cost, so there's no upside for him. I get it....he's not successful because he's daft is he lol |
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Post by Deleted on Sept 18, 2020 20:01:51 GMT
Depends if the cost of the parts is more than the retail cost of the cable.
I looked at building my own, and it was cheaper to buy it made.
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Bigman80
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Post by Bigman80 on Sept 18, 2020 20:46:09 GMT
Depends if the cost of the parts is more than the retail cost of the cable. I looked at building my own, and it was cheaper to buy it made. I get ya..we will see |
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Post by Deleted on Sept 19, 2020 12:09:54 GMT
Brooky uses mainly off the reel furutech cabling and plugs, with some nice braided coverings, I am sure you can do better Oli
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Bigman80
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Post by Bigman80 on Sept 19, 2020 12:51:40 GMT
Brooky uses mainly off the reel furutech cabling and plugs, with some nice braided coverings, I am sure you can do better Oli Well "better" is always a contested, so lets settle for "preferable in my system" lol |
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Post by Deleted on Sept 19, 2020 13:58:32 GMT
I would send you one of mine, except my system won’t work without it....
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Bigman80
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Post by Bigman80 on Sept 19, 2020 14:34:48 GMT
I would send you one of mine, except my system won’t work without it.... Hahahaha, Fair enough. I'm not looking at mains at the moment, I have other stuff to get done first. For one the Preamp needs building, the BB3 needs finishing touches, cables need making and I need to rejig my TT setup and sort out a wee bit of sibilance that's turned up. I might look when all that is done. |
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Post by Deleted on Sept 19, 2020 15:51:57 GMT
I am not looking at anything HiFi, probably for the next few years. The exchanger in my heat pump has fractured, and there is a risk of water in the compressor, so the whole thing may have to be changed. It is only 6 years old.....
The replacement will not be cheap....
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Post by hornucopia on Sept 19, 2020 15:54:43 GMT
I thought it said NANOtech for a mo'
(http://www.6moons.com/audioreviews/nanotech7/1.html)
but it's NEOtech.
Colloidal!
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Post by antonio on Sept 20, 2020 2:49:56 GMT
I know my brother brother purchased a 2nd hand Crystal Cables power lead and the improvement over a Russ Andrews one was quite something.
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Post by misterc on Sept 24, 2020 18:25:40 GMT
I know my brother brother purchased a 2nd hand Crystal Cables power lead and the improvement over a Russ Andrews one was quite something. I would agree with you Antonio Crystal cables I have a couple of examples are they are not to bad at all. That said some of RA's offerings are quite ok as well, and I do not retail either of these brands, just observations. |
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Post by antonio on Sept 25, 2020 1:21:47 GMT
I know my brother brother purchased a 2nd hand Crystal Cables power lead and the improvement over a Russ Andrews one was quite something. I would agree with you Antonio Crystal cables I have a couple of examples are they are not to bad at all. That said some of RA's offerings are quite ok as well, and I do not retail either of these brands, just observations. Yes misterc, he's always been happy with his RA leads and power block, but when the Crystal was plugged in we were both very surprised at the improvement. |
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Post by pauld on Sept 27, 2020 10:37:22 GMT
I have always found that mains cables do make a difference but not quite as much as interconnect, but slightly more than Ethernet cables.
Currently I’m using MCRU mains cables which were bought second hand, and they were an improvement on the Russ Andrews ones I had before, which were themselves an improvement on the stock cables.
Why they make a difference is beyond my technical understanding, but for me there is something there.
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Post by hornucopia on Sept 27, 2020 12:27:08 GMT
Impossible to isolate a cause? Does just pulling out from mains socket 'clean' the contact area, etc.?
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Post by misterc on Sept 27, 2020 13:20:47 GMT
There are many causes why mains bourne interference can effect the SQ in your system: DC offest, they should be zero, however............... welcome to England  Common mode noise, the effect of this differs according to your area, how close you are to various businesses, loadings, amount of houses on your substation etc. Harmonic distortion both on voltage and current These issues are before it enters your house! Mains quality can easily be measured and is quantified by various standards such as IEC62301 and IEC61000
Other qualified standards are PCF (power correction factor) CF (crest factor both current and voltage) standby power, initial turn on inrush power as well as reactive and apprant power.
Power can be measured directly from the wall as well as having a specially designed break out box to go between the wall sockets and the device you are looking at so cables can be characterised (dynamically) in situ
So regarding the age old how queston how can the last two meters from the wall socket make any difference what so ever, that is a straightforward non issue 
The mains power in the UK is 'rated' @ 230Vac -6%, +10%. This gives an allowed voltage range of 216.2 volts to 253.0 volts. So variance of 36.8Vac which is ridiculous imoi more than enough to cause bulbs to blow, transformers to destabilise along with many other issues around voltage regulation.
The UK is also 50Hz frequency which is 50 cycles a second and the wave form is sineasoldial
However with the amount of rubbish that sits 'on' or within the mains power supply its not not simple:-
Notice the truncation of the waveform at the peaks and troughs this is piss poor but that is what you have to work with unless you use a mains regenerator, however they have they're own issues.
My lab mains supply is totally separate and isolated from the main building supply and also sports isolation transformers and mains conditioners yet this is the measured result of the incoming power:-
This show the harmonic content up to the 8th Harmonic from the fundamental
This images shows the full power analysis suite of the scope feature looking at the results of the above two images.
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Post by sq225917 on Sept 27, 2020 13:28:56 GMT
Please explain, other than shielding to prevent ac coupling to signal, how can a simple mains cable affect what you hear?
Feel free to illustrate with any comparative measures of actual audio output.
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Post by iceman16 on Sept 27, 2020 14:13:55 GMT
Paul from PS Audio
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Post by iceman16 on Sept 27, 2020 14:18:24 GMT
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Post by sq225917 on Sept 27, 2020 16:39:47 GMT
Like I said, sure, shield your mains cables where they lie alongside signal.
But noise on a mains cable doesn't mean noise on the output.
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Post by misterc on Sept 27, 2020 16:50:23 GMT
Please explain, other than shielding to prevent ac coupling to signal, how can a simple mains cable affect what you hear?
Simon
First up apologies my hosting skills were off earlier now rectified all images present and correct.
Good question
Here are some observations besides shielding, Though there are many forms and materials that constitute shielding plus the effectiveness of the shield covering, some more or less effective at various frequency points up to 30Mhz and beyond. This is part of testing required for mains cables that are attached to various equipment when performing conducted, radiated and immunity EMC testing as well as stand alone units.
Other parameters that can equally have an effect on mains cable performance, dielectric constant, construction techniques, material differenices between conductors and connector material, cross sectional area this will generate impedance mismatches.
We can not only look at the incoming mains quality to a consumer abode, look at connecting cables, but also view the amount of noise each piece of audio equipment generates and puts back into the return a/c circuit, as well as consumer appliances.
We don't just do not look at steady state we look at all possible aspects of noise propagation and ingress.
Would you say that having an electrical quieter power supply to feed say a TT motor, dac or streamer would be beneficial to the SQ than say the current crop of smps?
Now that is perfectly measurable on the dc side and thousands of EE do this daily in pursuit of reducing the carbon foot print , and making the devices use less power and the power that is consumed more efficient.
However to do this you will also need to know all of the incoming a/c properties as well so you can formulate your emc filtration stratagem. This also DIRECTLY effects the DC output ripple noise as well so in essence they are inextricably link.
So one could hypothesis that while measuring these parameters right through the supply and consumption chain that ANY changes that are made to a specific model (both theoretical pc modelling or actual test bed DUT fixtures) will achieve a defined difference in the measured stages that will either reduce or increase the final ripple noise.
Now would you say that lowering the actual power supply noise would be beneficial to sound quality?
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Post by misterc on Sept 27, 2020 16:55:02 GMT
But noise on a mains cable doesn't mean noise on the output.
Simon
Would you care to supply some before and after proof of this for us please. I am genuinely interested in this statement and can we take aside any inconsistency with having zero or inadequate a/c and a/c filtering in said circuit.
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Bigman80
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Post by Bigman80 on Sept 27, 2020 17:08:47 GMT
sq225917 misterc Gents, I'm not sure if there is a bit of needle between you two, but the posts read that way to me. If there is, let's leave it out and get on, if there's not ignore me. May just be my Spidey senses playing me up.
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Post by misterc on Sept 27, 2020 17:15:42 GMT
Pretty sure that's not the case Oli, Simon was just questioning the post I made and with his reply I did the same, perfectly amicable, I did not detect any odd vibes genuinely
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Bigman80
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Post by Bigman80 on Sept 27, 2020 17:19:13 GMT
Pretty sure that's not the case Oli, Simon was just questioning the post I made and with his reply I did the same, perfectly amicable, I did not detect any odd vibes genuinely Excellent...... I'll have a small Whiskey In front of the Chimnea and relax in that case.  |
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