Subject: Re: parts needed
Author: andy hill
Date: Mar 6, 2005, 12:25 PM
Post ID: 1718499272
Pat-
hi there- yep- changed the cap, roror, and condenser. cleaned and filed
the points, and checked the voltage at the points with a multi-meter
[12.8 volts]. strange, strange!!! isolating block is in good shape, too,
nothing grounding out. i can't afford to pull out much more hair!!! :>p
thanks!!!!
andy
Patrick Hayes wrote:
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Trial and error unless you have a coil bench tester. Rare items. Since you have used a new coil with the same results, I'd start looking elsewhere. The coil gets "energized" when the points are closed and contacted. When the points open, the 12v circuit to the coil is broken. The energized magnetic field within the coil collapses catastrophically and "induces" a huge whack of high voltage spark in the process. The breaking of the 12v coil circuit happens by opening the points. However, this is a dynamically slow, gradual process as the points are levered open by the rotating cam and there is some voltage bleedoff at the contact surfaces as they open. So, we use a condenser as a small, temporary electrical storage device. It is there to keep a good voltage supply in the 12v circuit until the point contact surfaces are fully separated. Then the condenser finishes its discharge INTSTANTLY and this leads to the catastrophic field collapse and subsequent spark generation. What's the condition of your point contact surfaces? Are you sure there isn't any debris causing a short of the 12v circuit? Have you substituted a replacement condenser? Patrick Hayes Fremont CA Your free subscription is supported by today's sponsor: ------------------------------------------------------------------- Get a FREE* 5 Megapixel Digital Camera - yours to keep! http://click.topica.com/caadeMob1dfltb2Paqpf/5Megapixel Digital Camera Promotion ------------------------------------------------------------------- |