Quote:
Originally Posted by TonyDuell
The symbol for the motor run capacitor (8C1) on the diagram posted is that of a non-polarised electrolytic. Normally such a capacitor can be replaced by 2 normal electrolytics of twice the value in inverse series.
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Sometimes non-polarised electrolytics will be used as a start capacitor, but using them as run capacitor is quite unusual (which means B&O would certainly do so) because it would become a relatively fast wearing part. Substituting them with a 'close but not quite there' equivalent circuit could lead to premature wear of the capacitors if they're not selected very carefully since they're effectively used as electrolytic rectifiers half of the time.
A large high voltage run capacitor would not be needed, maybe a few 63v or 160V MKP or FKP capacitors in parallel? 3 times 4,7u and one 2,2u would make up 16,3u which would be within tolerance if the original was 16u.