Quote:
Originally Posted by Magnavox300
Just curious, can you double the capacitance value on a electrolytic?
I needed a 5uf, but I bought a 10uf since I couldn't find a 5.
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In most cases, doubling the capacitance will not cause any problems. Possible exceptions:
Filter caps right off the cathode of a rectifier tube. Using a grossly oversize cap here can overtax the rectifier tube due to excessive charging current. Tube manuals usually specify a maximum capacitance value for each tube type and filter arrangement.
Caps used in timing circuits.
Capacitors used in loudspeaker crossover networks.
Electrolytic capacitors in general have pretty lousy tolerance specs. -20%/+100% was typical for tube era caps
Exact tube era values can be a bit hard to find these days. instead of 20, 30, 50 uF, today 22, 33, 47 are the usual nominal values.