Homebrew PCBs

Hi  all,
I built the UV lamp box by Think N Thinker, as per there drawing.
I use Ever-Muse Positive presensitized  pcb for all my pcb's
exposure time 90 sec and I get very good pcb all the time.
bob

scratch_6057 wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "leon_heller" <leon355@...> 
> wrote:
>   
>> I've uploaded a photo of my simple UV exposure unit:
>>
>> Photos>Leon's>UV unit
>>
>> The black-light UV tubes are mounted in ordinary 8W fluorescent 
>>     
> light 
>   
>> fittings. The box is made from MDF and wood, screwed and glued 
>> together. A sheet of ordinary window glass that I had cut to size 
>>     
> sits 
>   
>> on the wood strips at the top of the side pieces. Exposure time is 
>>     
> 13 
>   
>> minutes.
>>
>> Leon
>>
>>     
>
> Nice job Leon! A lot less complicated that the one that Think N Tinker
> describes. Lots of  Questions;  Did you consider white paint inside? 
> Diffuser plate (milk white translucent acrylic) between lamps and the 
> glass plate? Not getting any exposure variations from the areas 
> directly above the lamps and the area between them? I see a number of 
> people  referring to various things as Black Light, `GROW' 
> lights, `Aquarium' fish tank lamps, Bug Zapper lamps and I remember 
> the `Black Light' lamps that had a dark blue or purple glass, (still 
> see them every so often,especially around Halloween) what exactly was 
> the INTENDED purpose of the lamps you are using? 
> How about telling us the physical size (dimensions) of that exposure 
> unit, PLEASE.
>
> Thanks
>
>
>
>
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