Ian Bell wrote:
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.

**Mea culpa. Stupid Farnell. Stupid me. Most of their cables are listed in
XXpF/Metre, except that one.

Use a buffer.


--
Trevor Wilson
www.rageaudio.com.au