02-08-2020, 09:48 AM
@BusyBee
Thanks for the links. The first one I think best describes the ignition system I've got as quoted below. The italics are mine.
"Some magneto ignitions use a coil as a flyback coil. In this type, the ignition coil is integrated as part of the magneto. Normally, the pulse of current produced would be AC, but the current, in this ignition, is switched off by a set of (opening) points or a transistor, just as the current reaches a peak value. Thus, it's really a short DC pulse, which gets cutoff abruptly, similar to that in a Kettering ignition. The flyback effect produces the spark similarly to that in a Kettering ignition. This type of magneto is often found on lawn mowers where there is no battery."
I'm quite heartened by this as if it's correct it looks as if the coil primary can be switched on and of by a transistor.
@Kalee20
I'm not a member of Facebook. I have thought of joining as the vintage scooter club I have joined uses a Facebook group as well. I'm a bit wary of Facebook. Might be an age thing.
Thanks very much for your kind offer. It looks very interesting to me. I'll send you a PM with my details etc.
Regards,
Ken.
Thanks for the links. The first one I think best describes the ignition system I've got as quoted below. The italics are mine.
"Some magneto ignitions use a coil as a flyback coil. In this type, the ignition coil is integrated as part of the magneto. Normally, the pulse of current produced would be AC, but the current, in this ignition, is switched off by a set of (opening) points or a transistor, just as the current reaches a peak value. Thus, it's really a short DC pulse, which gets cutoff abruptly, similar to that in a Kettering ignition. The flyback effect produces the spark similarly to that in a Kettering ignition. This type of magneto is often found on lawn mowers where there is no battery."
I'm quite heartened by this as if it's correct it looks as if the coil primary can be switched on and of by a transistor.
@Kalee20
Quote:Or, the Facebook group, 'Cyclemaster Help Desk'
I'm not a member of Facebook. I have thought of joining as the vintage scooter club I have joined uses a Facebook group as well. I'm a bit wary of Facebook. Might be an age thing.
Quote:This quarter's issue of the East Anglian Cyclemotor Club (EACC) magazine includes an article about changing a magneto with a Chinese CDI system at £13. (It's where the FB suggestion above came from).
I've finished with the magazine - if of interest, send me a PM with address and I'll stick it in the post.
Thanks very much for your kind offer. It looks very interesting to me. I'll send you a PM with my details etc.
Regards,
Ken.
