Trevor Wilson wrote:
"Ian Bell" wrote in message
...
I need to send an audio signal from a 50K ohm source over a distance of a
couple of feet in a screened cable. However, most audio coax seems to be
about 100pF/ft so 2ft of this and 50K will turn over just below 16KHz. So,
anyone know a source of low capacitance audio coax?


**Use a buffer first. A 50k Ohm source is stupidly high. A high quality
buffer can be assembled for a few pennies.

If you must persist in using broken equipment, you could look at a variant
of RG59/U coax. Capacitances figure range from 50pF ~ 70pF/Metre. Belden
have a cable called 1192A, which exhibits around 40pF/Metre.


1192A is 40pF per foot not per metre.

Cheers

Ian

Use a buffer. MUCH smarter.