Unfortunately, the Panasonic condensers I tested so extensively for use in Lucas and BTH magnetos are now out of production and no longer easily available:
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=467734#Post467734
However, I just completed a series of tests on an alternative that is currently in production and available at $2.70 for the pair needed for a magneto. As described elsewhere, I did an accelerated lifetime test to the equivalent of 20+ years of storage at 72 oF plus 30,000 miles of use at a very high operating temperature. Details are at:
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=508762#Post508762
Note that I have no financial stake whatever in these capacitors so I have nothing to gain whether or not you follow my recommendation. Also, it is worth emphasizing that the 20 years plus 30,000 miles is only a lower limit because, other than discoloration of the white plastic base, these capacitors showed no sign whatever of degradation when I ended the test after a month. There is no reason to expect they would not continue to last quite a bit longer.
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=467734#Post467734
However, I just completed a series of tests on an alternative that is currently in production and available at $2.70 for the pair needed for a magneto. As described elsewhere, I did an accelerated lifetime test to the equivalent of 20+ years of storage at 72 oF plus 30,000 miles of use at a very high operating temperature. Details are at:
http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=508762#Post508762
Note that I have no financial stake whatever in these capacitors so I have nothing to gain whether or not you follow my recommendation. Also, it is worth emphasizing that the 20 years plus 30,000 miles is only a lower limit because, other than discoloration of the white plastic base, these capacitors showed no sign whatever of degradation when I ended the test after a month. There is no reason to expect they would not continue to last quite a bit longer.