HI Harvey

Rapid Electronics do a range of non-polarised here
http://www.rapidelectronics.co.uk/rk...2536&XPAGENO=1

(from http://www.rapidelectronics.co.uk/) - they do a 4u7 35v in a case size
of 11 x 5mm for £0.048, or cheaper in quantity.
They also do a 3u3 100V in a case that's 11 x 6mm for 7p each (or 6.4p if
you want 40) - but I'm not sure how well a 100V rated non-polarised would
behave with less than 20V on it.


Many thanks - looks like Rapid are the ones - reasonably priced as
well - wonderful !

I'm not sure what the likely effect are of running an electrolytic at
1/5 of rated voltage.......... so probably best to go for the 35V
ones.

These caps are in a pretty undemanding circuit - they provide a
sustain effect by charging & discharging through a couple of diodes -
so as long as they're all the same (nominal!) value - then the exact
value isn't critical......

I've had three or four of them fail so far - so it seems like a good
time to change the lot of them - perhaps the organ will run for
another 30 years after that !

Many thanks
Adrian
Suffolk UK