HeadSmess
Well-Known Member
- Local time
- 4:39 PM
- Joined
- May 17, 2010
- Messages
- 3,048
its cold. its wet. its nasty outside.
so i pulled apart yet another magneto today
and rewound with 800 odd turns of .25 wire, ending up with a coil that delivers approx 30 volts at idle. thats AC, with no load, mind you. dare say it drops a bit with load.
then snuck on the main winding, but fell a bit short at 2800, reading back on the last time i did this, appears im about 700 short...oh well! yeah, well, it still only took an hour by hand. would have taken me longer to find my winding machine!
it still started first kick, with a stock cdi and reading about 30 volts there, too. possibly a bit retarded now i guess...
all for what?
well, the 800 turns of heavy wire is for my freaking headlight! 18w 12v led monster of a thing, turns the night to day! and my sla battery died due to the vibration, rather awkward as it gets dark at night... ever tried navigating by the white line when there ISNT a white line to navigate by? and if someone pulls out in front of me...ouch. they always do, too!
theres only about 250 turns normally, so i tripled and added some
the verdict?
wired up a reggy reccy from the local "dead pitbike pile", ie my shed, found my multimeter is now grumpy and wont give me a good reading BUT... (3v regardless on DC? maybe i should heed that battery indicator and replace it?)
the headlight and the taillights are now motor powered bit of strobing at idle, but that quickly settles down with a touch of throttle.
next...wire it up permanently and fit some capacitors instead of this 3 kg SLA paperweight
time will tell how reliable it is i guess. 18w is a fair bit of current draw, and thats not factoring in the tails, at least another 5watts there... so im guessing 2 amps. meh. as long as my headlights blindingly bright, doesnt fry out, and well...im happy
pics? what pics? whattya need pics for? maybe in a few days when reliability is thoroughly tested... for now, im keeping that lead counterweight in place, just in case... and carrying a spare magneto
was unusual, unwinding this one. appears it was wound "sensibly" with that nasty solder join being what its assumed to be, a centre tap! must have been the one that would run lights previously before it fried out. cus none of the other ones with "white" wires have been able to!
so i pulled apart yet another magneto today
and rewound with 800 odd turns of .25 wire, ending up with a coil that delivers approx 30 volts at idle. thats AC, with no load, mind you. dare say it drops a bit with load.
then snuck on the main winding, but fell a bit short at 2800, reading back on the last time i did this, appears im about 700 short...oh well! yeah, well, it still only took an hour by hand. would have taken me longer to find my winding machine!
it still started first kick, with a stock cdi and reading about 30 volts there, too. possibly a bit retarded now i guess...
all for what?
well, the 800 turns of heavy wire is for my freaking headlight! 18w 12v led monster of a thing, turns the night to day! and my sla battery died due to the vibration, rather awkward as it gets dark at night... ever tried navigating by the white line when there ISNT a white line to navigate by? and if someone pulls out in front of me...ouch. they always do, too!
theres only about 250 turns normally, so i tripled and added some
the verdict?
wired up a reggy reccy from the local "dead pitbike pile", ie my shed, found my multimeter is now grumpy and wont give me a good reading BUT... (3v regardless on DC? maybe i should heed that battery indicator and replace it?)
the headlight and the taillights are now motor powered bit of strobing at idle, but that quickly settles down with a touch of throttle.
next...wire it up permanently and fit some capacitors instead of this 3 kg SLA paperweight
time will tell how reliable it is i guess. 18w is a fair bit of current draw, and thats not factoring in the tails, at least another 5watts there... so im guessing 2 amps. meh. as long as my headlights blindingly bright, doesnt fry out, and well...im happy
pics? what pics? whattya need pics for? maybe in a few days when reliability is thoroughly tested... for now, im keeping that lead counterweight in place, just in case... and carrying a spare magneto
was unusual, unwinding this one. appears it was wound "sensibly" with that nasty solder join being what its assumed to be, a centre tap! must have been the one that would run lights previously before it fried out. cus none of the other ones with "white" wires have been able to!