[TCML] Baffle tally (was Secondary Troubles)
dogbrain_39560 at yahoo.com
Mon Jul 7 07:07:24 MDT 2008
I used 2 baffles near the ends in a 6" coil and a couple of 4" coils. The magnet wire on the outside, top & bottom, extends a couple of inches past the baffles. On one 4" coil, I used no baffles. None of the coils have suffered internal breakdown. All were wound on PVC pipe.
Years ago I found some big sheets of clear, 1/4" Plexiglas that were being thrown away at work. I rescued these from the dumpster, and they have become my lifetime supply.
I draw circles on the plastic using a compass and cut them out a little oversize with a jigsaw and a fine-toothed scrolling blade. Next, I drill a small center hole (neatly located by the compass stylus), insert a bolt and nuts, chuck the thing into a drill, and spin it against a sanding block for a perfect press-fit in the PVC form (sigh--the stuff us non-machinists must endure to get by). Finally, I seal the edges and the center hole with lots of clear, 100% silicone caulk.
None of my coils, baffled or otherwise, have suffered carbon tracking. I don't know if the baffles help or not. Even so, if I invest several hours in a new secondary, I'm not going to worry about an extra 30 minutes making baffles. I'm putting them in there--just in case.
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