Homebrew PCBs

Hi Paul,

Thanks for the info on the commercial unit.
Re timer as I need to make a board asap I'll just do it with clock and switch initially.

Thanks, John G3UGY

 

--- In Homebrew_PCBs@yahoogroups.com, Paul <paul@...> wrote:
>
> Hi John
> 
> I don't know about the ballast question, in my old commercial but 
> un-branded box which I got from a rally it matches the tubes.
> 
> Mine has 2 x 8W 29cm tubes which are fine for exposing the size of 
> boards I make. The clear glass area is 15 x 25cm and the tubes are 
> spaced 9cm apart. There's a flat foil reflector behind the tubes. 
> Exposure time with Mega pre-sensitised board is about 3 minutes.
> 
> Curious what you are going to do for a timer? Mine doesn't have one and 
> fitting one is on the list of things to do in the shack.
> 
> Regards
> 
> Paul G4DCV