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Re: Copper Banding?
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- Subject: Re: Copper Banding?
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sat, 26 Feb 2005 12:45:29 -0700
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Original poster: Kurt Schraner <k.schraner@xxxxxxxxxxx>
Hi Karl, Tyler, all
a slightly more "amateur"-way construction of a ribbon type primary than
Finn's, is the one I made for a small twin-TC.
My strip primary (ribbon spiral) is made of copper ribbon of 0.55mm
thickness only (20mm wide). The distance between turns is only 6mm (~1/4").
I also don't meet any problems with corona/arcovers, when feeding 33nF
primary cap with up to 1300W from a 15/60 NST. A pic may be seen at:
http://home.tiscalinet.ch/m.schraner/FlatPrim_1555.jpg
The view is from the bottom side (...when later buildt into the TC). In
front of the coil are 6 of the really flat taps, developped for this
primary, mounted on a piece of ribbon for demonstration.
Remember, if calculating the inductance of those primaries, the inductance
is _less_ than one made of wire/tubing conductors, and calculated by the
usual wheeler-formula. Metal ribbon type spiral primary inductance
calculation is available, in form of a zipped Excel, at:
http://home.datacomm.ch/k.schraner/FlatRibbonCoil.zip (~57kB)
Best regards,
Kurt Schraner