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Re: [TCML] I think I ruined my 6" secondary.
Usually, when a coiler does his/her first sanding job on a coil (between
coats), they go a little too far on that first sanding layer and the
insulation is removed in areas creating the shiny spots. As long as the
coil is coated, then this is only a cosmetic concern. The coil will
still perform as intended. To prevent this, I apply 2 coats before
sanding, and then sand between each coat. Depends however on the
thickness of the coating applied.
Kris Grillo wrote:
I hand wound a 6" acrylic form with 22 gauge a few months ago. It wasn't the greatest winding job I had ever done. There were a few turns that were a little loose, but over all, turned out pretty damn good for not building a jig. I started coating it with poly and once I got about 10 coats on it I noticed it was kind of getting a little rough from dust and whatnot, so I grabbed a piece of 400 grit sand paper and gave it a light once over and began coating it again. Thats when I noticed that I had sanded the insulation off in some spots on a few of the loose turns. There are maybe 3 or 4 of these spots on the bottom of the coil and 4 or 5 spots in random places along the entire length. I was so bummed about it that I shelved the project and haven't given it much thought since.
I have since finished two other smaller coils
and would like to work on this one again, but the secondary makes me nervous. I was thinking of putting about 100 coats of poly on it and keeping my fingers crossed. I was hoping to put around 4KVA through it. Has this ever happened to anyone else? Is this secondary salvageable or should I scrap it and save up for another acrylic form and a new spool of 22 gauge (might be awhile, I'm broke at the moment)? Any suggestions?
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