Help needed with PCB UV Exposure box - Page 2

zeus_threat · 6th October 2008, 06:05 PM

Am back after some long time. I tried to experiment with my tubes in parallel or series as attached but was able to keep only 1 tube on. In the attached wiring its always tube 2 which gets on. From time to time 1 can get tube 1 but for only a few seconds but then tube 2 switches on and tube 1 is off. Could it be the ballast or something else?
If i connect only one tube it works fine but for two only 1 is on.

Thanks for the help

richie00boy · 6th October 2008, 07:09 PM

Sorry my UV box is at my other house. I don't have the drawings now as I made it over 10 years ago. I just copied the smaller unit sold by RS Components. I think I only have 1 starter and the tubes are wired in parallel.

zeus_threat · 7th October 2008, 04:50 PM

Thanks again richie boy but the thing that strikes me is how it is behaving so strangely as only 1 tube is on. By the way these tubes come from an insect killer they sell at Game store here. I've lighted one of the units but its really light. I wonder if these actually use a ballast inside????? Its not worthwhile buying one to dismantle it. In case i can i'll try another ballast just to check. At worst the only choice is 4 starters, 4 ballast

6th October 2008, 07:09 PM	#12
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Sorry my UV box is at my other house. I don't have the drawings now as I made it over 10 years ago. I just copied the smaller unit sold by RS Components. I think I only have 1 starter and the tubes are wired in parallel. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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7th October 2008, 04:50 PM	#13
zeus_threat diyAudio Member Join Date: Nov 2005 Location: Mauritius	Thanks again richie boy but the thing that strikes me is how it is behaving so strangely as only 1 tube is on. By the way these tubes come from an insect killer they sell at Game store here. I've lighted one of the units but its really light. I wonder if these actually use a ballast inside????? Its not worthwhile buying one to dismantle it. In case i can i'll try another ballast just to check. At worst the only choice is 4 starters, 4 ballast