Doug,Ive always found the black belts out perform the others, whether neoprene, latex or pure rubber, I have no idea why.
Regarding your measurements, it is usual to quote a charging current, rather than a voltage, 9MV did make me wonder just how big your VDG test rig was, until I clicked that it was referring to 9mV. If you know your meters internal resistance it should be fairly easy to convert those voltage readings to uA
Cheers Derek On 03-Feb-16 7:05 PM, doug wrote:
For those interested in VDG generators; I have been testing different belt materials with my VDG test fixture with some interesting results. The rollers are both PVC, one plain and one with metal coating and are setup for a 4 inch X 40 inch stretched belt. With the belt running at 412 RPM or about 1400 FPS the neoprene belt shows 9 MV, the gum rubber belt 3 MV and the blue exercise belt just over 1 MV. The neoprene and rubber belts are both 1/16 th inch. Draw your own conclusion but I vote 100% for the black neoprene! PS; I am not the best at understanding the scales on my multimeter so MV may not be the proper scale, but I think you can understand the difference in readings. Doug _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
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