Re: Potting on the Cheap (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 7 Sep 2003 09:26:06 +0100
From: colin.heath4 <colin.heath4@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Potting on the Cheap (fwd)

hi matthew,
                    the problem with that silicone is its acidic and will
corrode the joints. candle wax is fine if melted then poured over slowly.
but then it is fragile one slight bend and it doesnt work any more.
i would go for melted vaseline poured over slow as not to cause air bubbles.
then once it sets you have a flexible high voltage potting compound.
cheers
colin

----- Original Message -----
From: High Voltage list <hvlist@xxxxxxxxxx>
To: <hvlist@xxxxxxxxxx>
Sent: Sunday, September 07, 2003 4:10 AM
Subject: Potting on the Cheap (fwd)


> Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sat, 06 Sep 2003 16:37:53 +0930
> From: Matthew Smith <matt@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Potting on the Cheap
>
> Hi All
>
> I have recently acquired some (very cheap) SMD equivalent devices to the
> 1N4007.  I'm going to use these to make HV rectifier strings on narrow
> PCBs - no drilling ;-)
>
> Construction is simpler than it sounds - once the board is etched and
> cut, a dab of solder paste onto each pad, mount the diodes, then into
> the oven for a couple of minutes.  (There's a wonderful site out there -
> can't remember where - how to make SMD boards in a toaster oven.)
>
> Once the boards are made, I'd like to coat the strings with something to
> stop them getting damp/dirty with the risk of flash-over.
>
> I was wondering if anyone had any experience using silicone bath sealant
> in this application.
>
> Cheers
>
> M
>
> --
> Matthew Smith
> Kadina Business Consultancy
> South Australia
> http://www.kbc.net.au
>
>