[Top] [All Lists]

Re: cable for long xlr microphone cables

Subject: Re: cable for long xlr microphone cables
From: "Jez" tempjez
Date: Wed Jun 20, 2012 9:37 am ((PDT))
thanks David.

Interestingly one of the reasons I asked this question was that, whilst its=
 a commonly held belief, the aluminium threads used for mic cable shielding=
 costs manufacturers the same & sometimes more than copper.

--- In  "Avocet" <> wrote:
> > Q: even at high cost some cables use braided copper shield & some
> > use braided aluminium shield. Does anyone know what the actual
> > difference is between the two in a practical sense ?
> Jez,
> Aluminium is cheaper. If there is a slight difference in conductivity,
> this should still be well within the cable impedance spec.
> The cable to avoid with long runs is helical screened which can puch
> up RF interference from medium wave transmitters etc. That is the
> reason for braiding.
> I've got 100 and 150 metre cables and I went for cable designed for
> permanent installations which was foil screened with a copper
> conductor. This cable is not designed to be flexed frequently but I
> use it in long semi-permanant runs into woodland.
> The only problem I have had with my long cables was when I had two
> double runs in opposite directions during a storm. My 11,000 volt
> electricity supply line was arcing over, and I got fizzle when both
> lines were plugged into my mixer, but that was extreme conditions.
> I've also used conductive plastic screened cable for short cables but
> have doubts about using it where flexibillty is not a requirrement,
> but it works. The doubts are mainly financal. :-)
> The other cable parameter is microphony but it is rarely given. Try
> tapping cables without an input and at high gain. Conductive plastic
> screening can be bad, but most helical screened types are quite low.
> Microphony is not important with studio or music work but with
> wildlife recording, if movement is involved, it could be a problem.
> Sorry to waffle but avoid helical and go for cheap cable. :-)
> PS. My cable drums are garden hose drums which are light and cheap and
> I screwed in clips for the XLR's. They easily take 300 metres of the
> foil screened cable. I use coloured heatshrink to identfy plugs.
> David
> David Brinicombe
> North Devon, UK
> Cogito cogito ergo cogito sum - Ambrose Bierce

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU