[R-390] On the subject of replacement capacitors...

[Barry]

I'm working on a General Radio 1617A capacitance bridge.  (At least) one of the electrolytics in the detector board is no longer acting like a capacitor.  This particular one is 5uF and is a coupling capacitor (120Hz signal).

Because they're not "standard" anymore, the 5uF caps are about 4 or 5 times the price of a 4.7uF.  Should I worry about the capacitance difference for this application?  I know the caps are generally -10%/+50% (or something like that) so the originals may or may not have been all that close to 5uF to start with.

I ask because this is test equipment (very nice equipment at that) and I want it working as correctly as possible; however, I'm still pretty sure this won't make any difference but wanted to "ask the experts".

Thanks,
Barry - N4BUQ