RE: Pictures of my 2KW coil and the 8x32 concrete toroid

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "david baehr" <dfb25@xxxxxxxxxxx>


Is that an 8" or 6" secondry. ??? ............


From:  "Tesla list" <tesla@xxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject:  Pictures of my 2KW coil and the 8x32 concrete toroid
Date:  Tue, 27 Sep 2005 23:09:03 -0600
>Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
>Hi Everyone,
>
>I finished building the 8x32 toroid using the mcmaster ducting
>material (5 mil stuff) and grout to make a smooth surface.  The
>following are my experiences:
>
>1. Grout sands easier than bondo (that's why I switch) and the work
>time is very good.  Before curing, grout is very chalky. Full curing
>takes many days
>
>2. Sanding to get a smooth surface worked fairly well but my results
>were not as good as D&M's work.  I attribute this partly to: grout
>sands maybe too easily.  I was able to reapply grout to fill in but
>if the depression was too shallow, it was hard to get the new grout
>to stick to the old grout thru the sanding process.
>
>3. Adhesion to the AL duct was not perfect and sometimes cracks
>formed and small pieces flaked off requiring reapplication.  This
>problem was not major and added only a small portion to the time
>required.
>
>4. There was some shrinkage with the first application of grout and
>generally required a second application and in some parts a third
>spot application.
>
>5. After I was satisfied with the surface, I gave the toroid two
>coats of varnish.  This gave it an excellent surface for taping and
>greatly reduced the vunerability of the grout to damage.
>
>6. Taping went very well.  I purchased 2 inch wide AL tape that I
>cut length wise into 1 inch strips.
>
>7. After taping, the toroid seemed very dent resistance although I
>wont test this on purpose.  The final weight was 15 lbs that seemed
>acceptable to me.  I probably wont use this method for much larger
>toroids, but for this size and smaller, I think the weight is not a
>problem.
>
>8. It took me two weeks to grout and a week to tape.  The grout time
>seemed higher than I expected but grout is inexpensive.
>
>9. Total cost $85:
>     a. duct = $30
>     b. Al center sheet = $20
>     c. Grout = $15
>     d. Al tape = $20
>
>Now for the pictures:
>
><http://www.hot-streamer.com/temp/GerryReynolds>http://www.hot-streamer.com/temp/GerryReynolds
>
>Go the the directory for the 15KV_120ma coil.
>
>There are pictures of the toroid during each stage of construction
>and the other components of my coil.  There are also pictures of the
>coil in operation both with a breakout point and ground target, and
>with no breakout point.  The longest power arc was 86 inches and the
>wall power was 2100 watts.  Exposures are 4 seconds at ISO of 400,
>800, and 1600.  The picture names make a story board sorta and are
>numbered in chronological order.  Enjoy.
>
>Gerry R.
>
>