Best cost effective electrolytic caps for a sound board

[bones]

If you were going to replace 30 or 40(not counted yet maybe more) electrolytic caps values 2.2uf 50v and 4.7uf 25v on an old style 1 amplifier for each 'noise' sound board, which way would you go ?

 

[John Bennett]

40 Panasonic 2.2uF capacitors are about £9 from Farnell so I’d probably not spend a great deal of time thinking about it - probably spend more time trying to work out how to get free postage 😃

Edit: technically I’d make double sure the pin spacing and size are identical and see what the best lifetime value I can get without paying much more

 

[bones]

Thanks John and yes £33 for free delivery hmm should be easy. Guess I should ask how you determine the rated tolerance on electrolytics. The originals were made by 'sun' which I think is 'suntan' now. Apart from the values one says H20 the H29, I guess hunting for the datasheet is next. I have a tester that I don't trust for accuracy but a couple of the ones I pulled were 4.7uf and read 5.2/3 ish which around the 10% mark but hate the thought of the odd different colour caps here and there that it already has (old I guess) lol.

 

[John Bennett]

Happy to be corrected, but I’d say it’s not so important. Capacitors aren’t fine tuned like resistances and fluctuate with all sorts of things. I would imagine 20% is ok for an audio circuit on an old arcade PCB.
If it was some form of finely tuned resonator circuit, I’d imagine it would matter more.

Edit: looks like 20% is the norm, and better is hard to come by, so that kinda settles it too