Re: electrical properties of acrylic

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

Original poster: "robert & june heidlebaugh by way of Terry Fritz <teslalist-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Dave: I have a problem caused by thermal expansion. I did not pre coat my
PVC or acetone pre wash the surface before winding and my resin did not bond
well so I developed thermal separation cracks up to 1 Cm as the wire moved
down my coil form. The glyptal pre coat would have  would have prevented
this.
   Robert  H

-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Sat, 01 Mar 2003 20:43:45 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Re: electrical properties of acrylic
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Sat, 1 Mar 2003 22:26:48 -0700
 >
 > Original poster: "Dave Leddon by way of Terry Fritz <teslalist-at-qwest-dot-net>"
 > <leddon-at-attbi-dot-com>
 >
 > Dr. R,
 >
 > Thanks for the information.  I'll have to score some Glyptal somewhere.
 > Out of ignorance and superstition I always expoy in a pair of lexan baffles
 > near the top and bottom of the PVC coil form shortly after drying.  This
 > being the case, is an internal coating still recommended to prevent
 > tracking?  What about the baffles?  Is this needless overkill?  I recall
 > reading several threads in this list which imply that the electrostatic
 > field created by the top load precludes any chance of arcing down the
 > center of the coil.  What's the straight dope?
 >
 > Regards,
 > Dave
 >
 > If I At 07:02 PM 3/1/03 -0700, you wrote:
 >> Original poster: "Resonance Research Corp. by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >>
 >> We just brush the AC-43 on.  We prefer using this as the finishing coats on
 >> magnet wire type coils.
 >>
 >> Even with the PVC tubes we always brush on 3 coats of Glyptal inside 
and out
 >> before winding.  Just use a piece of rag dipped into the Glyptal and 
the rag
 >> is affixed to a piece of stiff wood like closet pole material or big dowel.
 >>
 >> Then, after the magnet wire is wound the AC-43 makes a nice 3-4 finishing
 >> coats.  With PVC insulated wire on our larger coils we use a single coat of
 >> the clear Gyptal.  Multiple coats produce a yellowish discoloration.  A 
coat
 >> is always required to seal the PVC and prevent tracking.
 >>
 >> Dr. Resonance
 >>
 >> Resonance Research Corp.
 >> E11870 Shadylane Rd.
 >> Baraboo,  WI  53913
 >> ----- Original Message ----- >
 >>> Would Dolph's AC-43 work as well as Glyptal for this purpose?  I have a
 >> new
 >>> six-foot length of 10-inch pvc that I want to coat and I was planning to
 >>> use AC-43  based on your previous recommendations.  I noticed that AC-43
 >>> comes in a dip and in an aerosol.  What do you use and what is your
 >>> recommended method of application?
 >>>
 >>
 >
 >