Homebrew PCBs

----- Original Message ----- 
From: "derekhawkins" <eldata@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, September 15, 2006 3:37 AM
Subject: [Homebrew_PCBs] Re: UV exposure boxes


> >The kalex box has light and dark patches.
>
> Tubes are probably spaced too far apart. I started with this;
>
> http://www.pbase.com/eldata/image/52324065
>
> Then went to this to ensure that would never be a problem;
>
> http://www.pbase.com/eldata/image/52321530

I just use two tubes quite far apart, but the distance from the PCB is quite 
large giving uniform illumination.

Leon