Re: Potting Diode Strings - yes!

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

Original poster: "PotLuck by way of Terry Fritz <twftesla-at-qwest-dot-net>" <potluck-at-xmission-dot-com>

Hi Kevin, all,

I suppose my question was a bit misleading. If corona is the enemy here then
could corona dope be used instead of potting the diodes? I've not used it,
nor have I seen it mentioned much, if at all, on the list. If it can be used
instead of potting then it would probably be a lot easier to "service" a
string if a diode went bad?

Rick W.
Salt Lake City

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, March 21, 2002 8:00 AM
Subject: Re: Potting Diode Strings - yes!


> Original poster: "Kevin Ottalini by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ottalini-at-mindspring-dot-com>
>
> Rick:
>         There are several types of corona dope, most notably red glyptol
> and black "corona dope" both from GC Electronics in small bottles
> (other companies make versions too).
>
> Glyptol is a thick red material that is almost like a baked clay when dry
> (it can granulate to a dust) and is fairly hard.  Works well for rigid
> things
> or as a coating, hard to get all the voids out.  I have seen a filled
> version
> used for air cleaner ion generators (Cockroft multipliers usually).  Not
> pretty but cheap. (just keep plastering it on until the corona is
> suppressed).
>
> Both usually are designed for thin painted-on coatings and are totally
> unsuitable for potting, (I tried) but work well to suppress corona on
> junctions and other non-flexing things (black corona dope is more
> flexible but easily detaches if flexed).
>
> If nothing else,they are unsuitable for potting because they shrink in
> volume tremendously as they dry.
>
> Bill Wysock used a glyptol on the conical secondary at Frys here in
> San Jose (Fremont store actually).  The type he found has a nice
> shiny red finish when dry.
>
> GC also makes a HV putty (blue if I remember right) that you could
> mush all around, but all of these items are very expensive for the
> volume you get (not much).
>
> Kevin
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Wednesday, March 20, 2002 10:11 PM
> Subject: Re: Potting Diode Strings - yes!
>
>
> > Original poster: "PotLuck by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <potluck-at-xmission-dot-com>
> >
> > Hi List,
> >
> > Has anyone ever used Corona Dope for this purpose?
> >
> > Rick W.
> > Salt Lake City
> >
>
>
>
>
>