mick wrote:
On Mon, 30 Nov 2009 21:09:48 +0000, Ian Bell wrote:

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?



Does it have to be coax? Have you tried a simple twisted pair? That isn't
a great distance - you may get away with it and the capacitance can be
lower than most coax cables.


Not really. This is inside a tube mixer and these are the feeds from
channels to the mix amp. I thought of using unscreened wire but I was
concerned about the crosstalk this would introduce especially at high
frequencies - a screen will prevent that and that is all I need it for
really. External interference is much less an issue given the relatively
high signal level and the fact the whole thing is in a screened enclosure.

Cheers

Ian