Re: First post...

[Nigel Orr <Nigel.Orr@xxxxxxx>]

>I have found a problem with composite video, in that running audio in
>another pair in the same cable (I don't have the luxury of multiple
>cables) causes bad video noise. You can >see< the music!

It will depend on the source and load impedances of the audio, assuming
you=
=20
are using cat5.  Also signal levels- read on...

>I am interested. Is this the little 600ohm jobs that Maplin sell?

Don't have a Maplin catalogue to hand, but you get 1:1 matching=20
transformers of good quality for about =A310 to =A320, look for Jensen,
OEP=
,=20
Lundahl, Sowter as reliable brand names, there are also some Neutrik
ones=20
which are probably OK, but I've not tried them.

You might also want to try a stepdown at the destination end so there's=20
less current flowing in the cable, which might reduce the video=20
crosstalk.  That will make the audio signal smaller at the destination
end,=
=20
but that probably won't be a problem, just turn the amp up to compensate.

> > This is the DIY approach, obviously if someone is paying you to
do an
> > installation, you aim to get it right first time,
>
>Now, >that< would be a good job!

From the audio installation side of things, I can assure you it's not all=
=20
it's cracked up to be... e.g. trying to convince a Hi-Fi buff that a sound=
=20
system is installed and set up optimally can turn hairs grey very
fast...=20
and that's just the start of it...

Nigel


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