Custom u cores anyone?

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M27 steel is a laminate,you need several layers to get the .105 inch thickness,not just one piece.It won't work unless it's laminates.
Don

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Ok I didn't know it was laminate, I missed that earlier, so the origonal core used some type of ferrite it looks like.
If were using a max of 20kHz we need some pretty thin pieces here.

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What are the limitations of going in the direction? I always thought electrical steel had a very narrow frequency bandwidth

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you can purchase the M27 laminates here at the following website...I contacted them a while back and if I remember right you can get enough to make 10 - 15 cores for around $150.  http://www.protolam.com/page7.html

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Awesome, Thanks Tony,

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Does anyone know what kind of enamel and what the build was on the 29awg wire Stan used in the 5 coil VIC?

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This is my first post and I'd just like to say I've learned more on this site in the last 6 months than any other site in the last 5 years.  Thanks!
I believe I may have found a source for ferrite u cores.  Magneticsgroup.com offer ferrite plates which I believe could be shaped with a laser cutting machine commonly found at steel fabricators.  They offer one size, p/n B-1377 which is 3.87" x 3.87" x .118" which should be sufficient for one u core.  Here's the link if anyone is interested.

http://www.magneticsgroup.com/f_other.htm

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Mr. Don,

Some here are suggesting Stan used iron or other wire in his dunebuggy coil, and that ferrous wire is the only way to make the vic coils work. I believe you said he used copper for all of his dunebuggy coils. Could you clear up this confusion?