I have designed and I am building just now a new UV box for my cyanotype negatives. My design is based with a previous one I built myself, more than 15 years ago, using 2 banks of 5 UV Bl tubes for printing double face electronic circuits. My old system is bulky, heavy and noisy ... but it is still working. It makes my cyano negatives in 4-6 min. New design try to include some improvements If anyone is interested in my new design it can be seen here:
http://www.novau.net/InsoladoraUV.dxf
Drawing can be opened with DraftSight or any CAD program and I can give details on any part not specifically shown at drawing
-Francesc