RE: Coax question

["Hawes,Timothy Edward (GEG)" <haweste@xxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: s369180  Sent: 02 May 2004 12:59
>
> What is the difference between low-loss 75 ohm coax cable for tv and
> radio distribution and low-loss 75 ohm coax for satellite tv
> distribution? They look identical, expect the former has white
> sleeving and the latter has black. Widths seem to be the same, both
> 75 ohm, both low loss, yet satellite version four times as expensive.
> Is it worth it or is it marketing?

Hi Stephen,

I'd suggest it's not just marketing, and you can also get it in brown too
;-)

If you look carefully at the shielding you'll see that the *digital*
satellite cable has a foil shield and a copper braid. The
"low-loss" TV coax only has a very wispy braid and no overall
shield. Digital satellite cable (typically CT100, or CT125 for longer runs)
is double screened, as described above, whereas some of the analogue cable
has a single shield, via braid, only.

Satellite signals are much higher frequency than regular broadcast TV, so
require a better quality cable to minimise losses.

I've bought my CT100 from Maplin & B&Q.

Cheers,

Tim H.

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