Re: HDPE vs Wood Primary Coil Supports

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jeremy Scott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>


Wow, Baraboo, WI!
Now there's a place I wouldn't expect to see here. :)

I used to live around the corner (across the
reservation?) from you in the Fox Hill
trailerpark/subdivision. (Now in Madison)

Anyway, thanks for the response.

I plan to make my primary out of a series of 1" copper
strips, not tubes. I figure the extra surface area
will allow for better RF characteristics and a smaller
more compact primary.

I suppose it would not be too difficult to create
a 1" by 1/16th wide cut with the jig saw. The biggest
problem I have with working with HDPE is that friction
from the sawblade tends to melt it as it's cutting.
Almost need a chisel to carve off 'waste'...



--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Dr. Resonance by way of Terry
 > Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 >
 > With a higher power coil I would consider Delrin,
 > not wood (fire hazard).
 >
 > Have a local machine shop cut it for you with a
 > standard 1/2 inch dia. ball
 > nose cutter on a milling machine.  Usually takes
 > approx 30 min. to do all
 > the cuts for a standard set of 8 pcs.  Use 3/4 inch
 > wide x 1 inch high white
 > delrin (acetyl) stock.
 >
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo   WI   53913
 >
 >
 >  > My first coil used HDPE (cutting board) as the
 > primary
 >  > coil support, and it was a pain in the butt to
 > cut
 >  > that stuff accurately and cleanly. I understand
 > that
 >  > it has great RF and high voltage insulation
 >  > properties, making it an ideal dielectric for
 >  > everything from caps to primary mountings, but it
 >  > is expensive and difficult to work with.
 >
 >