Old 10-30-12 | 06:59 AM
  #3  
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flammenwurfer
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Joined: Aug 2009
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From: Mississippi Coast

Bikes: 198? Raleigh Technium 480, 1970 Raleigh Sports, Motobecane Nomade Sprint

I think I at least understand the basics of dynamo bike light wiring. I know the hub is supposed to put out AC 6V 3W 500ma. I did some more tinkering last night and I think I have come to the conclusion that my Novatec hub either is not working correctly or just sucks. I hooked up a multimeter to the Novatec hub and spun the wheel with my hand as fast as I could. I would get a peak of about 8 volts, which at first I thought was normal. Then I did the same thing with my other dynamo hub (sram i-light) and was getting 9-10 volts.

That doesn't seem like a huge difference but when I hook the same light up to both hubs, it is at least 3 times brighter when connected to the sram hub. Could that big of a difference in the power output of the two hubs be right? They both technically have the same specs of 6V 3W so I wouldn't think it would be that big of a drop in output if they were both working correctly.

My fear is that the Novatec is just malfunctioning and I'll have to shell out for a new hub, spokes and truing of a wheel.
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