>On Sun, 4 May 2008 10:09:34 -0700, "Richard Crowley"
>xp7rt.net> wrote:
>

>>"Don Pearce" wrote ...

>>> "Richard Crowley"
>>> xp7rt.net> wrote:
>>>

>>>>RF coax made for cable TV use have foil shields plus
>>>>a few strands of wire braid around the foil. In fact many
>>>>of them even have a double foil shield.
>>>>
>>>>Don't mistake the wire braid (which may, indeed be only
>>>>10%% coverage) for the actual outer shield of the coax
>>>>which is the active portion.

>>>
>>> Yup, but the stuff we are discussing here has just a very loose braid.
>>> Have a look at the second pic on this page - low loss TV coax.
>>>
>>> http://www.megalithia.com/elect/cable/index.html

>>
>>What is that stuff good for?!
>>I've never seen anything like that over here. It can't be
>>useful for low-level signals (receiving, audio, etc.) any
>>place where there is any RFI.
>>

>It is good for absolutely nothing, and nowadays resides only in cut
>price electrical stores and old boxes in attics.
>

>>OTOH, they make an intentionally "lossy" coaxial cable
>>(one brand name is "Radiax") which is used for distributed
>>Tx/Rx (such as running a cable through a tunnel to provide
>>cell service underground, etc.) That stuff has holes all along
>>the length to deliberately leak RF along the way.
>>

>I know Andrew's Radiax very well - I've specified it for distributing
>VHF in tunnels.
>
>d