Here you go , Joe’s free opinion on condensers ( you know about what is said about free advice) …. For the vast majority of the motors that we commonly deal with a capacitor of .22 uf will do the job. The idea of "matching" to the coil and mag is no doubt a great thing in theory. However in practical terms, even the modern caps are rated plus/ minus 10% of labeled value. I would guess that the old paper/ wax caps of days gone by were lucky to be +/- 20%. If you look at most charts the range of recommended capacitance is 5 uf. so add to that a +/- 20% and you begin to get a better picture of what will work in a particular motor. Thanks to the help of one of our members that is tech savey we have found a modern foil cap that has yet failed to bring back to life any motor that we have tried it on. Vishay 1839HQ .22uf +/- 5% rated at 850 volt. And best of all they are small enough to retrofit into most of the old cap "cans" for those that like to maintain the original appearance.
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