Re: [TCML] I think I ruined my 6" secondary.

[Kris Grillo <kristianisawesome@xxxxxxxxx>]

Hello all,

Just an update. After a few more coats of poly, I was able to put about 2 KVA through a static gap into this coil last week and all is good so far. Not a single sign of trouble. I was afraid I was going to have to loosen the coupling to avoid flash over from the primary to the exposed copper at the bottom of the secondary, but this was not the case. Everything went quite smoothly.

Now I'm on to finish the asynch rotor and I think I'll have a nice little coil to show at the upcoming 'thons. :)

~Kris

--- On Mon, 6/30/08, Kris Grillo <kristianisawesome@xxxxxxxxx> wrote:
From: Kris Grillo <kristianisawesome@xxxxxxxxx>
Subject: [TCML] I think I ruined my 6" secondary.
To: tesla@xxxxxxxxxx
Date: Monday, June 30, 2008, 8:08 PM

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?

~Kris




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