Re: Insulating Boards (was Homemade PCBs!)

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

Interesting problem,

Has anyone tried polyurethene with appropriate spacing.

Gerry R


 > Original poster: Matthew Smith <matt-at-kbc-dot-net.au>
 >
 > Eric writes:
 > >I'm going to try something soon...any tips on making a PCB insulated to
 > >15000 volts?
 >
 > Matthew replies:
 >
 > 1) Keep traces as far apart as possible.
 > 2) Pot the PCB.  Commercial potting compounds that I've seen are a
two-part
 > mix that leaves your board in a lump of black yuk.  Virtually impossible
to
 > service.
 > 3) Look up "conformal coating" on your vendor's Web site - these are spray
 > or paint on coatings of acrylic/silicone/etc.  These insulate and protect
 > the board from environmental attack.
 > 4) Put it in an oil bath.  If you're working with power devices, this can
 > also help with cooling.
 >
 > If you're building an MMC or any multi-stage device, you may not need any
 > form of extra insulation provided that you make the whole thing linear and
 > observe appropriate spacing of the traces.
 >
 > Cheers
 >
 > M
 >
 > --
 > Matthew Smith
 > Kadina Business Consultancy
 > South Australia
 > http://www.kbc-dot-net.au
 >
 >
 >