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Old 1st December 2005, 08:06 AM   #1
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Question RG59 Coaxial shielded cable for input wiring?

Hello Everyone,
Me again with another thought.
I haven't been on the forum for a month or 2 due to spending time learning how to build Yagi antennas so I can pickup Digital TV and the off the rack TV antennas weren't up to scratch.
It took me 2 months but I now have Digital TV reception!

This brings me to my question?
Has anyone wired up their Amplifier inputs with Coaxial cable instead of the normal Audio shielded cable most of us use.
I asked this as While working on my antenna it wasn't hard to notice that this Coaxial has a 1 to 2 mm solid core wire and is shielded by 2 or more layers of wire and aluminum which might add some benefit to shielding the input of an Amplifier over the normal Audio cable used.
What do you think??
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Old 1st December 2005, 09:18 AM   #2
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Coaxial cable is a very generic name. There are so many types available.
If you are talking about coax used for RF and cable TV you have to be quite careful. You get copper braided shield , aluminum braided shield , foil shield , foil and braid shield etc.
They also come in different grades of braiding depending on how much protection the cable requires. Additionally the core can be pure single copper , or copper coated wire , stranded copper etc.

However if you are using a high level signal source ( 1 volt or more) then maybe you can get away without any shield if cable lengths are not long. I use a Cat5e cable about 1.5 meters long with no hum problems and sounds far better than any coax I have. My cable is the standard gray one ( outer covering ) with teflon insulation on the inner wires and not the fire resistant purple coloured one which I believe does not use Teflon insulation (?).

Someone will have to answer your question of how coaxial cable sounds .....as compared to what ? We will also need to know the cable type that was used !
Cheers.
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Old 1st December 2005, 09:31 AM   #3
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Never used RG59.
In the 80s a German audio magazine experimented with a whole range of industrial cables for audio purposes, the RG59 was not recommended.
RG59 has blank copper core and shield, the solid core makes it unpractical.

First one i tried was RG58, which has a stranded core, both core and shield are tinned.
Later tried RG188 and RG196, both with silver layered core and shield, both with full PTFE isolation.
RG188 diameter is 2.7mm, 1.9mm for the RG196, in contrast to RG58 that does 5mm and 6.15mm for RG59.
A nice cheap one with solid core is the 5.3mm RG223, double shielded and silver layered.

I've been using 11mm diameter RG214 coaxial cable as interlinks between preamp and power amplifiers for ages.
Silver layered, a super cable, only trouble is finding the right kind of connector, the diameter and weight of the cable requires a 90 degree angle connector.

Sidenote: turned out that one of the cables tested in germany was identical to a VDHull bestseller, A.J. undoubtebly ordered the stuff relabelled from Berkenhoff & Drebes.
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Old 1st December 2005, 09:55 AM   #4
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Hi John ,
RG 142 is also a good cable ,
more flexible as the other cable and good for interlinks .


Greetings from Germany

Jürgen
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Old 1st December 2005, 10:29 AM   #5
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Quote:
Originally posted by audiotux
RG 142 is also a good cable
Very nice cable, a feet of it costs US$3.50 though.
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Old 1st December 2005, 04:52 PM   #6
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very cheap , here in Germany 1 Meter cost 6,20 Euro
at www.kabel-kusch.de !!


Jürgen
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Old 1st December 2005, 07:56 PM   #7
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I will probably be flacked right off this thread, the site and probably the planet for my views about cable. Of all the quasi logical to pure illogical hype in hi-fi, I have never found anything to de-throne cable hype. This is not an arrogant or derogatory remark; it is just that so many blind tests have consistently shown that folks swearing to be able to detect distinct differences, suddenly lost that ability in such tests. Also, scientific arguments are lacking totally - measurements will easily show that any half-decent co-ax or screened cable will have no effect whatever in the audio spectrum (in domestic applications), either through capacitance, inductance or resistance - yet improvement in those parameters is regularly quoted to try indicate a particular brand's superiority.

Having said that, I also believe the main (and only) problem with RG59 might be lack of flexibility because of the solid core - I have never tried it. I have found the ubiquitous RG58 excellent and used that, mainly because pieces were available - I must have gone through 100s of meters at work. As said, most other half-decent screened wire should do the job, though.
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Old 1st December 2005, 08:18 PM   #8
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RG-59: I do recommend it, I have got excellent experience with this cable.
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Old 2nd December 2005, 08:35 AM   #9
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Hello Everyone,
So it looks like Coaxial Cable is being used in Audio.
The Main reason I thought of using it was to shield my Amplifier from RF Noise etc etc.
I hadn't thought about if 1 coaxial cable sounded better than another.
So please keep your thoughts on which one to you sounds best.
Thank you all for the replies.
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Old 2nd December 2005, 08:38 AM   #10
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Quote:
Originally posted by John Biles

So it looks like Coaxial Cable is being used in Audio.
Even the cheapest standard cable you get with low-cost equipment is usually a coaxial cable, although much thinner and cheaper quality than RG59 and similar.
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