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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition
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<blockquote data-quote="Matty" data-source="post: 26883" data-attributes="member: 1339"><p>Two 12v coils in series would need 24v volts to work properly so it must be two 6v coils in series for your 12v system.</p><p></p><p>Don't really see why a double ended 12v coil from Goff should be rev limited unless they are using a cheap form of iron core which does not work at high frequencies (I used to design transformers and inductances in the 1950s in my early electrical reseach careeer) and had to think about these details then. The Rita man has no doubt done some experiments, so you have to believe him when he says it will not work properly above 5800 revs - which coincedentally was the limit put on the old style crowded roller Vincent big ends!!.</p><p>However a Japanese 12v double ended coil should be fine - they are designed to work at much higher revs than a Vincent could ever go.</p><p></p><p>Best of luck.</p><p></p><p>Matty. <a href="mailto:mattynjane@btinternet.com">mattynjane@btinternet.com</a></p></blockquote><p></p>
[QUOTE="Matty, post: 26883, member: 1339"] Two 12v coils in series would need 24v volts to work properly so it must be two 6v coils in series for your 12v system. Don't really see why a double ended 12v coil from Goff should be rev limited unless they are using a cheap form of iron core which does not work at high frequencies (I used to design transformers and inductances in the 1950s in my early electrical reseach careeer) and had to think about these details then. The Rita man has no doubt done some experiments, so you have to believe him when he says it will not work properly above 5800 revs - which coincedentally was the limit put on the old style crowded roller Vincent big ends!!. However a Japanese 12v double ended coil should be fine - they are designed to work at much higher revs than a Vincent could ever go. Best of luck. Matty. [email]mattynjane@btinternet.com[/email] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ignition
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