____ This one black & one red, (as opposed to two yellows), alt.wire-leads subject has been brought-up on this w.site before.wcorey wrote:DCT-Bob wrote:You have the odd 60w.alt with the quite rare black & red alt.wire-leads,
Bob, this of course has me very curious as I wasn't even aware of it's existence. From the small pics it appears to be at least extremely similar the yellow wire version, though I guess if the only difference were wire color than it would have been pointless to change it (but stranger things than that have popped up out of the factory).
So you're inferring that the two coil sets are wound and/or connected differently?
Otherwise it would seem that the wires would be interchangeable.
Here's the what's-what on this matter which I happen to be aware of...
__ When I first encountered a Monza with these strange wire-colors, I then assumed that the original yellow/yellow alternator-stator had been replaced under warranty with a replacement-unit which had been built with whatever the original-defect having been addressed & updated.
However due to the eyebrow-raising number (with the red & black) which I've since come-across plus others I've heard tale of as well, I've come to gather that that presumption is probably not the actual case,, and that (for some unknown reason), Ducati had a batch of such fitted stators produced & ORIGINALLY installed.
I've never had such a stator of my own but assume them to be just the same as the regular alt.stators (with the y/y.wire-leads), since all the other electrical-workings remain the same on either equipped DUKEs.
So therefore I had not meant to infer that anything else was different.
____Well yes, the "timing" of the (raw/AC) power-PULSES would of-course be the same for both alt.windings,wcory wrote:DCT-Bob wrote:In either case, one of them will run the ign.system while the other won't (due to alt.rotor-timing) !
Since both winding sets reside on the same core-posts, wouldn't the rotor-pulse-timing be the same on either?
however since the two windings are 180 out of phase, the required PHASE of the needed DC.power-pulse is thus-then not timed the same from both alt.outputs ! _ So after rectification, ONE of the alt.outputs is left unused,, and-thus the associated diode's output would happen to be dead during the time when the ignition would use alt.power, (assuming the battery happens to be low).
__ To this reply above, one may be inclined to think that the situation is to be actually blamed on the involved diode's polarity-connection rather than the 'alt.rotor-timing',, but it's actually possible to flip which alt.wire-lead's rectified-output is live or dead (for powering-up the ignition), by resetting the alt.rotor's timing either 60-degrees retarded or 60-degrees advanced !
____ This kind of stuff all being well understood, it then ought to be realized why the stock charging-system must be thought-of as "duel half-wave rectification" rather than ordinary 'full-wave rectification',, as others may possibly jump-to-conclusion of.
(I wonder if MotoMike has ever yet seen the light I once tried to shine on this issue we once had !?)
Duke-Cheers,
-Bob
