On 15/12/2015 15:53, Dave Plowman (News) wrote:
Since I didn't really get a definitive answer I took a punt and bought a
reel of RS 7481958.

It's about the same diameter (3.1mm) as cheap audio co-ax and has a
conductive layer with drain cable, so nice and easy to fit connectors to.

Not really coax though, is it? What's the conductivity of the black layer?

I bought a reel of excellent miniature coax many years ago, enough to
last a lifetime.
But as the label has fallen off I can't tell you where I got it.
Possibly Maplin but they don't seem to stock it now.
It had a black conductive layer with a proper braid outside.

--
Eiron.