John Curl's Blowtorch preamplifier part II

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Oh, I take advantages of power conditioners, AC power cords, and exotic cables, but I just don't talk about them on this website. Too controversial.

It's not that the subject itself is controversial, it is just that some people have little to no control over their baser urges. That they don't really understand the nature of consciousness or their lack of control of it's minimal manifestations.
 
And was made years ago when John first brought this up. But he keeps regurgitating it.



Actually, Ohno developed his heated mold process for the continuous casting of fine wire and thin foils. But the companies that are making it (and marketing it pretty much exclusively to the "audiophile" community) cast rod and then draw it into wire.

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Some of them don't do it very well.

I've heard some stories........
 
A pic:

EDM the pole and plate like the picture. The flux has to travel into the surfaces at the gap, and there are no cuts which introduce permeability of 1 into the mix. The cuts eliminate eddy currents.

Any structure which the flux has to pass through cannot have low permeability. Making the plate or pole out of steel laminations introduces material in the 2 to 3% by volume range, and that 2 or 3 % air or glue heavily compromises the permeability. Lam stacks are anisotropic, permeability normal to the glue surfaces is not 98% of the iron, but easily an order of magnitude down at the least.

This design cuts the eddies, and retains the flux path reluctance where it was supposed to be.

Edit: I doubled the cuts on the outer plate, but really, all you need to do is get the uncut widths at the gap into the 1mm or .5mm range. I've measured stacks with both, and at .5mm, I get very good hf results.

BTW, this concept is patented. I was considering this design as a collaboration with you a while back as I did not find any pre-existing, but eventually I did find the concept (sigh). Not EDM mind you, but segmented iron pieces.

Shorting rings should not be seen by the voice coil assembly.
edit: I added this to my gallery.

Edit v2..Lamination of circles to make the pole piece causes the vc magnetic permeability to cog, so it is unwise to make the pieces out of a lam stack. As the vc moves, the direction it moves must have a smooth magnetic environment.
Edit v3: btw, it is a trivial process to cut everything in the magnetic structure, then vacuum impregnate the structure to hold the pieces together.





Yes. Like dating and marriage..

jn

Dammit john. I had that idea too, about 10-12 years back. I sat on it, waiting to get into the loudspeaker market.

Oh well, take that one off the pile......
 
I've been wondering if I could use my pressure cooker to impregnate things. For instance, fill a balloon or high-temperature bag with oil, seal it, and cook it (water boils in a balloon, but a pressure cooker is 50F hotter, so I don't know). Don't forget the trivet.

You'd want to dry it well before this, or steam from the object might rupture the sack.

Does this sound safe or worth trying?
 
The modern definition of chaos implies emergent properties, a "structure" within the process observed. True randomness closely observed includes only more randomness on all scales, turtles all the way down.

Thanks,
Chris

It's always been my impression since a teen, that reality as we know it, is a load line, with some points..we drew a line, we live on that line and either end of it ..fades into the grey nothingness of unknowns.

Thus it is force/energy of will and intellect that defines limits, not 'reality, as 'reality' has no anchors, just some points that it is related to. Reality is an abstraction, at best. Nothing more. No facts. With no anchor, no end points, nothing else is possible.

Exactly as the constantly rolling and moving cutting edge aspects of physics has always said - and said so quite plainly.

The rest, the whole objective reality thing... is just human emotion and pouting insistence.
 
Well, after it normalizes at 15PSI which is the standard for pressure cookers, then the release of pressure has pretty much the same effect as a vaccuum.

I'm not sure how much of a vaccuum 15PSI is. I've had the thought of doing something similar. Take a jar, put a small balloon in it with some water, and microwave it until the boiling water inflates the balloon inside the jar. Then drop in your object and the penetrating varnish or oil, and close the lid. The steam will condense into water, deflating the balloon and leaving a vaccuum in the jar.

I'm just not sure whether that will produce a safe amount of pressure or not, and I don't want to find out the painful way.

I know that canning jars are meant to hold a certain amount of pressure. So I suppose if I used a canning jar instead of a balloon, that would be safe for the pressure cooker. The jar would seal itself and I could just leave it for a week to penetrate nicely.

I suppose this is not any different than the microwave method, because in both cases the jar fills with steam (higher pressure steam in the case of the cooker, so the microwave method may actually be weaker). When canning you're advised not to fill the jar below a certain point, or else you risk breaking jars (that'a what I heard at least) so this must be a good indication of what is safe.

I may have answered my own question.
 
I've been wondering if I could use my pressure cooker to impregnate things. For instance, fill a balloon or high-temperature bag with oil, seal it, and cook it (water boils in a balloon, but a pressure cooker is 50F hotter, so I don't know). Don't forget the trivet.

You'd want to dry it well before this, or steam from the object might rupture the sack.

Does this sound safe or worth trying?

Sealed vessel, like 2-3-4 inch cast pipe....build a valve and a gauge onto it, use a tire pump for the pressure aspect. A much cleaner solution.

For a vacuum, use a vacuum pump. It can be don inexpensively via bleeders for brakes, which are hand held vacuum pumps, essentially.
 
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