RE: Homemade potting?

["Lau, Gary" <Gary.Lau-at-compaq-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

>Original poster: "sundog" <sundog-at-timeship-dot-net> 
>Interesting use for the vaseline (i prefer it under car door handles as a
>practical joke myself;), but what is it's diaelectric value?

If you mean dielectric constant, that's only relevant if the jelly is the
dielectric between plates of a capacitor.
If you're referring to dielectric strength, I don't know the value but I
suspect it's not too different than mineral oil.

>How well does
>it prevent corona, 

All that's needed to prevent corona is to displace air, and with the melted
Vaseline being such a low-viscosity liquid, I think it does a fine job at
that.

>and doesn't it trap heat?  Veeeery interesting :)

If does trap heat more-so than a liquid, but if you really need to dissipate
heat, you shouldn't be potting in a solid anyway.  In the case of my potted
NST, with my LTR cap, my single 15/60 draws over 20 Amps from the variac and
it will partially re-melt the Vaseline if I run it long enough.

>>Original poster: "Lau, Gary" <Gary.Lau-at-compaq-dot-com>
>>
>>It depends on what your goal is.  If the container of the object to be
>>potted is reasonably sound, you can melt Vaseline jelly and pour that over
>>your object, and it will jell to its original state.  That's what I did
with
>>my NST.
>>
>>Gary Lau
>>Waltham, MA USA