Re: Flat Spiral Winding Techniques

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Robert -

Tesla list wrote:

> Original poster: "rheidlebaugh by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
>
> Dave: I use fiber glass resin to coat all my coils. I can have a coil ready
> for use the next day.I suggest this on the net and get no responce.You are
> using urethane and take days. Can you tell me what advantage your coating
> has ? I would like some feedback. I may never change, but I would like to
> hear some responce. Thanks
>   Robert  H

Fiber glass resin would be just fine. I used spar varnish mainly for
cosmetic reasons, flexibility, and
because it's in the garage.

Some advantages to varnishs, urethanes, etc.:
* it wicks into the windings where a resin won't.
* if there's damage, like a shorted turn, it's easy to see and fix.
* if done right, it looks really nice.

Disadvantages:
* takes a while.
* can be damaged if the wife opens the garage door and knocks the coil over.
* hard on flat secondarys.
But with the strips of superglue runners on top, the windings stay down
nice and flat. I just applied my
3rd varnish coating (nice and thick). The flat secondary is perfectly flat.
Now it's just a matter of the
number of coats I want.

Take care,
Bart