RE: Useing silicone encapsulants for HV

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

Original poster: "Mccauley, Daniel H by way of Terry Fritz <teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>


You can purchase samples from GE silicones rather inexpensive for fairly
large quantities.  I just purchased about a gallon
of a two-part silicon potting material for $20.00. They also have
distributors in the UK.

GE Silicones used to provide these samples for free, but recently started
charging a small amount of cash mostly to cover
administrative and shipping costs I think.

The Captain




I'm planning my next Marx generator, and am thinking of using 2-part clear
silicone encapsulant to
insulate much of it to avoid corona loss.
The plan is to use  folded 3mm thick actrylic section as the main upright,
with two 'V' sections,
which will be filled with encapsulant,forming a triangular potted section.
This will cover the charge resistor chain and the ends of the caps.

Anyone have any good/bad experience with this stuff ?
Any pointers to UK suppliers would be appreciated - the only one I can find
at the moment is RS, and
their price is UKP30 (~US$50) for 450g, which seems rather a lot....

I'm assuming silicone is th etype to go for, as I want it reasonably clear,
and flexible enough to
avoid cracking.