Regards to soldering, as I have said many times before, it is one of the most studied areas of electronic production, and as usual there seems to be the audio myths surrounding it.
The most important part of a solder joint is the SOLDER. Metal to metal joints are created by crimping or some other method other than soldering (insulation displacement, faston connectors etc), if you use wire, you tin it first, component leads are tinned etc etc.
There is a whole wealth of data out their regarding solder and soldering, it is critical to electronic assemblies, and critical to a good solder joint is intermetallic formation during the joint formation.
Some stuff, though IPC-610 accreditation is a good start...
http://www.ipc.org/4.0_Knowledge/4.1_Standards/IPC-A-610E-redline-April-2010.pdf
http://publications.npl.co.uk/npl_web/pdf/matc164.pdf
Empfasis - Intermetallics in Electronic Soldering
http://www.google.co.uk/url?sa=t&rc...TDhM8GxE6keQ6VzQow9ZOMQ&bvm=bv.46226182,d.d2k
Inmagic DB/Text WebPublisher PRO - DB/Text WebPublisher cannot be accessed in this way.
http://www.sanminasci.com/pdf/solutions/pcbres/impact_of_intermetallic_growth_on_leadfree_joints.pdf
http://snebulos.mit.edu/projects/reference/NASA-Generic/NASA-STD-8739-3-2.pdf
http://www.google.co.uk/url?sa=t&rc...DksVEXcTktSosPagnA&bvm=bv.46226182,bs.1,d.d2k
http://www.google.co.uk/url?sa=t&rc...DksVEXcTktSosPagnA&bvm=bv.46226182,bs.1,d.d2k
The most important part of a solder joint is the SOLDER. Metal to metal joints are created by crimping or some other method other than soldering (insulation displacement, faston connectors etc), if you use wire, you tin it first, component leads are tinned etc etc.
There is a whole wealth of data out their regarding solder and soldering, it is critical to electronic assemblies, and critical to a good solder joint is intermetallic formation during the joint formation.
Some stuff, though IPC-610 accreditation is a good start...
http://www.ipc.org/4.0_Knowledge/4.1_Standards/IPC-A-610E-redline-April-2010.pdf
http://publications.npl.co.uk/npl_web/pdf/matc164.pdf
Empfasis - Intermetallics in Electronic Soldering
http://www.google.co.uk/url?sa=t&rc...TDhM8GxE6keQ6VzQow9ZOMQ&bvm=bv.46226182,d.d2k
Inmagic DB/Text WebPublisher PRO - DB/Text WebPublisher cannot be accessed in this way.
http://www.sanminasci.com/pdf/solutions/pcbres/impact_of_intermetallic_growth_on_leadfree_joints.pdf
http://snebulos.mit.edu/projects/reference/NASA-Generic/NASA-STD-8739-3-2.pdf
http://www.google.co.uk/url?sa=t&rc...DksVEXcTktSosPagnA&bvm=bv.46226182,bs.1,d.d2k
http://www.google.co.uk/url?sa=t&rc...DksVEXcTktSosPagnA&bvm=bv.46226182,bs.1,d.d2k
I dunno.... a lot of the power I used on the continent was 120-0-120. AKA Bi-phase. I also have that here in my house in the U.S., if I choose to use it.
FWIW, balanced power for audio isn't a new fad, it's been around for years. Started in recording studios, as far as I remember.
Notice that he has one of them shorted out. 😀
An inlet filter works for both differential and common mode when all the components are in-circuit.
This is a very advanced concept which cannot easily be explained here. But after years of careful experimentation and rigorous calculation (some of which required a super-computer), a discrete set of lengths based on Cantor sets and SU(3) algebras were predicted to be optimal; these are based on the cable geometry and the field interactions peculiar to the specific dielectric materials. Rigorously controlled listening tests validated this concept.
I don't think you need the rigorously control tests if the concept is good. In this case the math. The concept should be self evidently better.
Well, some of us trust our ears more than we trust math. So we need to validate by ear, which is the only way we can advance the art. It's a matter of getting beyond the oversimplifications of conventional engineering. Orthodoxy is a set of chains preventing free movement of the mind.
That's true, but.... if you really want to sell radical advances in the art of audio, listening is inconvenient. Concepts, claims and testimonials are much better.
that "product" makes sense somewhat, but not a breaktrough to worth the trouble
just a 70% snake oil
They're necessary but not sufficient. True audiophiles want to know that the concepts have been validated by listening, preferably using people with high end systems that are properly set up and that they're intimately familiar with. Math can get you close, but to really nail it takes a lot of work, sometimes doing things like varying insulation thickness by a few microns in one direction or the other or changing the type of copper used.
It's a 90/10 proposition- you get 90% of the way there through the concept and calculation, which take 10% of the effort. What separates the real high end is the other 90% of effort (listening and fine adjustment) that it takes to squeeze out that last 10% of performance.
Hmm... true enough. That's where anecdote and testimonial are so important. Flowery prose has high value, too. Someone has to find it reveling.
The schematic looks like a proper representation to me. The center of the common-mode caps in the inlet filters are tied to safety ground, are they not?
Here's a schematic of a CorCom inlet filter:
An externally hosted image should be here but it was not working when we last tested it.
The schematic on 6 Moons is illustrative of the transformer up on the pole and how the safety ground is tied to neutral back at the service panel.
Am I missing something?
se
What "balanced" power does is make chassis leakage currents common-mode rather than differential. Not sure how much snake oil you would want to ascribe to that.
se
Look at the first figure of the 6 Moons article. He shorts out one of the caps by tying the neutral to the chassis. Steve's drawing is correct.
What has that to do with whether or not the first schematic on the 6 Moons page is complete nonsense?
se
Yes. That illustration is showing the inlet and transformer of the audio gear.
OK, I see what you're on about now. The midpoint of the caps tied to the neutral line.
In a bonded neutral system that is basically what you get with the midpoint tied to neutral anyway. Although there will be a lot of R & L between were you connect to neutral and where neutral is tied to ground - at the electric meter, typically.
In a bonded neutral system that is basically what you get with the midpoint tied to neutral anyway. Although there will be a lot of R & L between were you connect to neutral and where neutral is tied to ground - at the electric meter, typically.
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