Re: Potting on the Cheap (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 7 Sep 2003 13:28:20 -0700
From: Jonathan Peakall <jpeakall@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Potting on the Cheap (fwd)

Robert,

I assume you mean hot glue, like from a glue gun. I have found that voltages
above 20kV or so start to eat away the glue. On flyback transformers, I have
found it to disapear fairly rapidly. Pock marks show up and then expand over
time. I use a "tool dip" type product on flybacks now, works great.

Just one data point.

Jonathan

www.madlabs.info



----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: <hvlist@xxxxxxxxxx>
Sent: Sunday, September 07, 2003 1:06 PM
Subject: Re: Potting on the Cheap (fwd)


> Original poster: Steven Roys <sroys@xxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Sun, 7 Sep 2003 08:34:29 -0600
> From: June Heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Potting on the Cheap (fwd)
>
> Matt: I have used silicon RTV sealant with good results, but you need to
> cure it well. I recommend you use "Heat glue" to seal your diodes. I use
> plastic drinking straws to hold my series strings of diodes and seal them
> full of heat glue. no AIR, WATER ,OR PROBLEMS.  I solder the diode leads
> side by side about 6cm long with out wrapping the leads
> ----   Robert    H            - Original Message -----
> From: "High Voltage list" <hvlist@xxxxxxxxxx>
> To: <hvlist@xxxxxxxxxx>
> Sent: Saturday, September 06, 2003 9:10 PM
> 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
> >
> >
>
>
>