MOTM

>Naturally if you are substituting several components for one,
tolerances (error) begins to add up.

I don't think it does since tolerance is specified as a percentage. In
parallel or series cobinations the tolerances should stay the same.

But 68nF and 82nF do exist, although the 82nF is getting harder to find.
Polystyrene types are the best to go for these sort of values, but those
little green mica types are also available in many values, although not
particularly stable.

Regards,

Tony Allgood  Penrith, Cumbria, England

Oakley Modular Synth and TB3030:
www.techrepairs.freeserve.co.uk/projects.htm
My music: www.mp3.com/taklamakan