Decent phono cable.

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.

And it does the job perfectly. No buzz at all.

Oh - a 100 metre reel cost less than many a single posh name phono cable.
;-)

--
*I know a guy who's addicted to brake fluid. He says he can stop any time.*

Dave Plowman London SW
To e-mail, change noise into sound.

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.

In article ,
Eiron wrote:
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?

Yes it is. The centre conductor is surrounded by what looks like
polythene. Then the conductive layer, then drain, then outer insulation.

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.

Yes - I remember that stuff too and used to have some until it ran out.
Thing is it's rare here to have problems with the screening, so can't say
if it performed better or not in that respect.

Quad used a very thin coax with a dense braided screen between the inputs
and amp cards on the 405 - as it crossed the mains cables etc and ran
close to the mains transformer. But I couldn't find similar.

I found it odd that CPC has such a poor selection of audio co-ax. More of
a choice in colour than spec. Perhaps no-one makes their own these days.

--
*It is easier to get older than it is to get wiser.

Dave Plowman London SW
To e-mail, change noise into sound.

In article , Dave Plowman (News)
scribeth thus
In article ,
Eiron wrote:
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?

Yes it is. The centre conductor is surrounded by what looks like
polythene. Then the conductive layer, then drain, then outer insulation.

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.

Yes - I remember that stuff too and used to have some until it ran out.
Thing is it's rare here to have problems with the screening, so can't say
if it performed better or not in that respect.

Quad used a very thin coax with a dense braided screen between the inputs
and amp cards on the 405 - as it crossed the mains cables etc and ran
close to the mains transformer. But I couldn't find similar.

I found it odd that CPC has such a poor selection of audio co-ax. More of
a choice in colour than spec. Perhaps no-one makes their own these days.


We use a lot of FST Foil Twin Screened and some single too Belden among
others make it, used a lot in radio studios and desks and the like....
--
Tony Sayer

Eiron wrote:


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?


** No - just two parallel conductors and so would not give the magnetic field rejection of co-axial construction.


What's the conductivity of the black layer?


** Not great, but works well in conjunction with the drain wire as a shield against mains voltage hum and noise.

An overall braid would be better in all respects.


..... Phil