Hi there, I'm new to the forum. I went to electronics school about 200 yrs ago so my theory is rusty. I have a 6 volt motorcycle and want to run 12 volt lighting. I have 6 volts AC+- at the alternator. I was concidering a transformer before the regulator/rectifier but weight for a transformer that would handle that much current, (approx. 10 amps on the primary) would be prohibitive. Any ideas if I can build a doubler that would handle 50-60watts on the output at 12 volts? Thanks Zeph