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Ground Loops and multiple power sources
I'm going to see whether it is possible to eliminate ground loops in my mount/scope/CCD systems. But it's not an easy thing to do I gather. I was wondering what precautions or preventative measures others have taken.
In my EdgeHD rig, for example, I run the Titan/Gemini I on it's own 18VDC supply. Although the Gemini power board has a power-out connector, I don't use it because everything else on that rig expects 12 VDC and I expect the power out connector on the Gemini would be at the higher voltage - not stepped down to 12.
Then there is a big ATIK camera, and a filter wheel, plus 3 dew heaters. These all want 12VDC which I supply through a separate supply. There is also a JMI focuser which wants 12 volts and because I think the 12VDC supply is close to its limits, I also have a second 12 volts supply running this alone.
The cabling for all this equipment is a mixture of serial cables (Gemini, FW, focuser) and USB (CCD and Lodestar).
Peter
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