Lostgallifreyan wrote in
:

Gaius wrote in
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Lostgallifreyan wrote:

Conversely, I found some nice coax in a skip once that had two heavy
braids amounting to almost complete coverage around a single fine
stranded core. (Found outside a telephone exchange, but I don't know
what frequency they were intended for, though I used some for an
outdoor VHF receiving quarter wave dipole with good results, and I
suspect it will do for a SW longwire once I get a matching transformer
for it).

If it was a UK (BT) telephone exchange, then it probably was "Cable
coaxial 2003".
Used for critical video and general HF use. I don't know what it's
officially spec'd to, but it would work well up to several hundred MHz.
Characteristic impedance of 75ohms, and easily capable of 100W into a
decent match.



Sounds like the same stuff, though I have 2002 on mine (which in absence
of other markings was cryptic enough that I was unsure of it, though I
think it might have been earlier than 2002 when I found it. I thought
it might be 75 ohm but I had no idea it might efficiently carry high
power. But I knew it was well over-spec'd for the uses I put it to. I
was lucky to find it. The staff there were happy enough for me to raid
the skip, too... Should try it again sometime. That stuff seems to last
forever even outside in strong daily temperature changes and direct
sunlight.


I forgot to mention that I also used some for a pair of DIY scope leads for a
100 MHz scope, and they worked right even without the little capacitative
adjuster usually supplied on properly made probes. A bit clumsy, but a nice
find all the same.