On Aug 29, 6:49*am, Highland Ham
wrote:
JIMMIE wrote:
I noticed the use of a lot of tie wraps. Its never a good idea to use
these exposed to sun light.

=============================
Black tie wraps contain carbon black and are hence UV resistant and
almost last forever.

Coloured or non pigmented plastic will indeed deteriorate due to UV
radiation.

Polypropylene rope , for example ,is usually coloured *but never black.
Reason : *If black it would not deteriorate due to exposure to UV ,hence
it would last far too long and the manufacturers would only need to
produce a fraction of their current production.
That's commercial life.

If you use *rope other then polyester (sailing boats etc) *try to find a
black plastic variety (not easy).
My 40 ft mast has (blue)polypropylene guys which need to be replaced
every 8 -9 years (even here in northern Scotland) ,but it is cheap
compared with polyester rope.

Frank * *GM0CSZ / KN6WH

Sorry I should have said "white tie wraps as shown on the website".
Black tie wraps dont last forever, they still get brittle and break
just from being in the sun. I wouldnt use them either unless they got
regular inspections. I tie wrapped coax to an antenna mast down in
Florida about 5 years ago and they are breaking. No doubt they would
last a lot longer in Scotland.


Jimmie