Another capacitor question

[Eddystonepete]

Hi N, it used to be said that the tolerance on electrolytics was -50 to +100 per cent. In those days we didnt have any way of measuring them. Today cap measuring meters are cheap and accurate, Ive found that most small el caps are within 5 percent of marked value. As to what to replace older values with, Its not that critical. If a designer wanted an exact value of capacitor he would never specify an electrolytic. either go up or down one value and note the result. Why not experiment a bit and report back to the forum!. Many years ago someone told me not to use a much higher voltage rating than the original electrolytic as under voltage will prevent them from polarising properly. Seemed sensible at the time.

Peter