Re: Dielectric constant table

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

Original poster: "June Heidlebaugh" <rheidlebaugh-at-desertgate-dot-com> 

I use low density PE, but it has a lower melting temp than PP. Both work
well. Be sure to allow enough overlap length (1",  35mm) to prevent arc over
the edges.   Robert  H

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, September 24, 2003 8:15 AM
Subject: RE: Dielectric constant table


 > Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com>
 >
 > Garden-variety polyethylene (PE) bags have the same dielectric constant
 > as polypropylene (PP), and PE actually has a lower dissipation factor
 > than PP (means lower losses/cooler operation).  But with either bag, you
 > still have the problem of impurities, trapped air bubbles, bulkiness,
 > messy oil, and typically, inevitable failure.
 >
 > I posted a comprehensive tabulation of dielectric constants and
 > dissipation factors to this list a while back, see
 > http://www.pupman-dot-com/listarchives/2003/March/msg00106.html.
 >
 > Gary Lau
 > MA, USA
 >
 >
 > Original poster: "Nick Andrews" <nicothefabulous-at-hotmail-dot-com>
 >
 > Has anyone tried polypropylene comic book bags in cap construction?  The
 >
 > really cheap ones are polyethylene, but the good ones are polypropylene.
 > Some are mylar, but they are more, and I imagine won't work at HF.
 >
 > Nick A
 >
 >