3k coil

<BODY BGCOLOR="#FFFFFF" TEXT="#080000" LINK="#0000CC" ALINK="#800299" VLINK="#663399"> <div> <I>3k coil</I></div> <div> <IMG SRC="13527480.jpg" border=0 width="295" height="328" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"> here's the whole tomalli, set up and ready for ozone production. i'll cover some of the theories and construction details here.</div> <div> the power suply unit will be covered on another page.</div> <div> that's harvey noris in the backround, boy was he busy being a grand host at the ne ohio teslathon, thanks harvey!</div> <div> i wanted to build a new coil for my power supply unit, in doing this i knew a few things that i wanted to try. i wanted to try an idea that i had about getting more turns of wire into the magnetic field generated by the primary coil. this would be a primer for a very large (at least for me) coil that i plan to build for display at schools and functions. and i didn't know at the time if the length of wire, being longer then the 1/4 wave frequency of the coil, would create any stresses in the windings?</div> <div> so i bought an 8.75" "sono" cardboard concrete form tube. i dryed it in the house for a couple days and then sprayed it with insulating varnish.</div> <div> i had 9 pounds of 28g wire to wind it with, 28g is a little thin in my book but it's what i had?</div> <div> i set the tube up by using two old sauce pan lids for end caps, i took the handles off and stuck 1/4 - 20 screws, 3" long into the holes. i stuck the tube into two bar stools and wraped a layer of clear box tape around the form, upside down, then stuck to itself about an inch overlap.</div> <div> i started winding, winding, winding and winding some more, as i aproched the edge of the tape i would put another wrap on it, and keep on going. it took me about three days, working on and off to get it done, 40" of windings,  6680' of wire, i epoxied an old record turntable to the base and drilled a 1/8" hole through the edge for a piece of tubing to serve as a rf ground terminal.</div> <div> <IMG SRC="092fabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="094fabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> the enameled sauce pan lid is used for the top cap, with a nylon bolt for mounting the toroid and a copper tube soldered to the top winding and placed over the bolt.</div> <div> <IMG SRC="099fabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="09bfabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> for the primary i used 1/8" copper tubing, 150' of it. i staarted with a sheet, 4' by 4', of hard board (masonite), after punching the numbers through wintesla v-1.0, i knew i would tap out to at least 23.5 turns on a center to center spacing of .340",</div> <div> at 150', i decided i would make it 36" in diameter. i used a string and a pencile to draw the iner and outer circle's, i cut them out with a jig saw, then painted with flat black paint</div> <div> <IMG SRC="08ffabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0">after sanding and repainting, i sanded with 400 grit sandpaper and sprayed a coat of clear insulating polyurethane over both sides. for the tubeing rails, i used 1/4" polyethelene cutting boards, i drilled 1/8" holes at 2" lines, .340" spaced all the way up and across the boards, after this i cut the boards up the center of the holes and at 1/2" wide. i spaced them radialy at 16 points around the base, triming to fit so that i had a set back on each on consecutivly.</div> <div> <IMG SRC="09dfabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="09ffabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> <IMG SRC="0a1fabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"> i made this little miter box real quick to get a nice cut with a back saw, it's just some pine i had laying around? you can see the cheap cutting boards that i got at dollor general, i use these things for everything.</div> <div> after screwing the poly rails from the bottom, i started winding the tubing.</div> <div> <IMG SRC="0b4fabb0.jpg" border=0 width="250" height="187" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="0b6fabb0.jpg" border=0 width="250" height="187" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> as you can see, i used 50' rolls of 1/8" tubing, joined together with small chunks of 12 guage wire soldered inside. (the bar stool pad just happened to fit right into the cutout?)</div> <div> <IMG SRC="0b8fabb0.jpg" border=0 width="250" height="187" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"><IMG SRC="0bafabb0.jpg" border=0 width="250" height="187" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div> didn't come out to bad, even if i do say so myself?</div> <div> <IMG SRC="0befabc0.jpg" border=0 width="250" height="188" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"> all set up (precariosly) on the stool, no pun intended? notice the old, unorganized lab, not as nice as the new unorganized lab?</div> <bR> </BODY>