Homebrew PCBs

Hi Mike,

Not sure what you mean by rigorous testing.  I've done a fair amount of
tests to zero in the best exposure time for the combination of lights,
distance, and artwork I use.  I'm not sure it would be very useful to
anyone else since I built my own setup and it will likely vary depending on
your light source and artwork medium.  I use two 40W U-shaped UV "bug
lights" from Home Depot, mounted side by side at 8 inches from my board.
It takes about 4.5 minutes to get a good exposure.  It's not really ideal
since the lights are fairly narrow (I really would like to have 4 of them
but haven't got around to it) but it works for my purposes.  I affix my
inkjet-printed red (Black prints out poorly on my transparencies) artwork
to the board in those vacuum kitchen sealer bags to get a very tight
interface since I don't have the room for a full-sized vacuum bed.

Regards,
Larry

On Mon, Dec 19, 2011 at 1:53 AM, MIKE DURKIN <Patriot121@...> wrote:

> **
>
>
> Thank you for your efforts ...
>
> Im wondering if you go through rigorous testing of your UV exposures bed?
>
> Keeping the stuff cold is no problem ... I have a small chest fridge for
> solder paste that's kept just above freezing already.
>
>
> Mike KC7NOA
>


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