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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Indentity of 12V Converter
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<blockquote data-quote="Pete Appleton" data-source="post: 3277" data-attributes="member: 145"><p><strong>Diodes</strong></p><p></p><p>The clue to the polarity of most solid state regulator boxes is the fact that they have a diode (one way valve for electricity) in them to perform the tasks of the original mechanical cut out. In this case all you have to do is <u>Disconnect the dynamo</u>, connect a test light between earth and the wire that was previously connected to the 'D' terminal of the dynamo. You can then try connecting a battery to the bike either way around. The way that causes the test light to glow is the <strong>INCORRECT</strong> way aroundas the blocking diode is not working. Swap the battery the other way around, so that the light does not glow, and everything should be fine. Click on the (dodgy) picture below to see how to set it up.</p><p></p><p>In the unlikely event that your regulator does not have a blocking diode and relies on the cut out in the miller dynamo then I am afraid that motoring the dynamo will not help as connecting power to the fields re-polarises the dynamo anyway. The direction of motoring is related to brush position and not polarity.</p><p></p><p>Don't know if this helps or just confuses you more <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> Pete</p></blockquote><p></p>
[QUOTE="Pete Appleton, post: 3277, member: 145"] [b]Diodes[/b] The clue to the polarity of most solid state regulator boxes is the fact that they have a diode (one way valve for electricity) in them to perform the tasks of the original mechanical cut out. In this case all you have to do is [U]Disconnect the dynamo[/U], connect a test light between earth and the wire that was previously connected to the 'D' terminal of the dynamo. You can then try connecting a battery to the bike either way around. The way that causes the test light to glow is the [B]INCORRECT[/B] way aroundas the blocking diode is not working. Swap the battery the other way around, so that the light does not glow, and everything should be fine. Click on the (dodgy) picture below to see how to set it up. In the unlikely event that your regulator does not have a blocking diode and relies on the cut out in the miller dynamo then I am afraid that motoring the dynamo will not help as connecting power to the fields re-polarises the dynamo anyway. The direction of motoring is related to brush position and not polarity. Don't know if this helps or just confuses you more :) Pete [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Indentity of 12V Converter
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