In ,
Z80 typed:
2. Use 2 bits of insulated wire twisted together. You would need a
DVM or something which could measure capacitance to check it - also
for 0.1uF depending on the thickness of the wires it could be a foot
or more long !

No, much much longer. That method isn't really good for more than a few pF
and we are after 100,000pF here.

--

Brian Gregory. (In the UK)

To email me remove the letter vee.