On Sun, 12 Feb 2006 13:25:44 GMT, "Ralph Mowery"
wrote:


"Tony Hwang" wrote in message
news:meBHf.602959$ki.30465@pd7tw2no...
jg wrote:


Hi,
Twin lead also has better quality foam ones not the skinny twirly kind.
Coiling up extra coax is not a good idea it can act like RF choke and
could lower signal level.
Tony

Coiling up extra coax wil not make it like a RF choke and will not lower the
signal level. As long as the coil diameter is large enough that the center
conductor does not cut into the iner insulation and short to the shield,
nothing on the outside of the coax will affect the strength of the signal.
The signal is carried on the inside of the outer shield. Coil up all the
extra you want. One thing that will affect the signal is if you have way
too much coiled up (like 20 or more feet) is the extra loss in the length of
coax. YOu will get the same ammount of loss if it is coiled or just ran in
a line.

If you are transmitting , coiling up the coax may have a benifit as it will
act as a choke and keep the transmitted rf that is coupled from the antenna

You sound like you know what you're talking about, but one thing gets
me. Here you say it will act as a choke and at the start of the
previous paragraph you say it won't. Why does transmission have a
different result from reception, or is there some other difference?

from getting back to the transmitter. Discussion on this is beyond the TV
application and not needed here.




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