Re: Convert rca to coaxial - audio only

"Laurence Payne" <lpayne1NOSPAM@xxxxxxxxxxxxxxxxxxxxx>
wrote in message
news:k9epl153pmqce5oa54gkqcu30ujra1rf70@xxxxxxx
> On Mon, 24 Oct 2005 21:49:26 +1300, "Geoff Wood"
> <geoff@xxxxxxxxxxxxxxxx> wrote:

>> You have never seen the "screen" of an RF TV cable ?

Usually aluminum foil with maybe some braid (maybe aluminum
there, too) over it.

Nasty stuff to try to solder - crimped termination is the
order of the day.

>> Coax cables work on a totally different concept to
>> screened audio cable.

Well RF cables are designed to exploit the fact that the
frequencies are high enough for skin effect to be relevant
and even useful.

> There's a centre core, there's a screen. Does its other
> characteristics preclude it from being used as simple
> screened cable for audio?

Probably the worst practical issue about coax that is
designed for RF is that the conductors are basically
copper-reduced and intended for use where the skin effect is
significant.

There may be silver plate on the outside of the conductor(s)
but the cores are likely to be steel or aluminum. This means
increased resistive losses.

Probably not going to be much of an issue with line-level
signals when line lengths are typical for a house.

Of course there are high-copper flavors of coax that work
swell right down to DC, and work pretty will for RF, too.
But, they may cost more or have less mechnical strength, or
both.


.

Relevant Pages

  • Some more feedline information.
    ... "Transfer Impedance - For a specified cable length, ... the opposite surface of the shield. ... Blue Jean Cables has a good simple article with chart. ... I compared several different types of coax. ...
    (rec.radio.shortwave)
  • Re: Low cost coax connectors
    ... Someone decided that all the coax ... and strip the center conductor. ... solder brush. ...
    (sci.electronics.design)
  • Re: Company network slowdown
    ... suppose to intentionally trash the packet to prevent propogating ... Everything else was coax. ... I still have a few 10baseT runs over 25 pair telco cables. ... for office networking on the original IBM PC's in the early 1980's. ...
    (alt.internet.wireless)
  • Re: Which is it, RG59 or RG6?
    ... RG-6/u is generally better for most everything. ... and mouse eaten cables are the usual culprits. ... Ok, the coax is suspect. ... amplifiers and splitters with unterminated outputs. ...
    (sci.electronics.repair)
  • Re: Verizon Dumping Usenet Servers
    ... Why would you need 3ft distance between, say, telephone wires and coax? ... Distance to the top (power) level, ... lasher that requires a couple feet of clearance to the strand above it. ... the lasher would rip the telephone cables ...
    (sci.electronics.design)
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