In article ,
"Robert11" wrote:

Hello:

Am about to start stringing some coax from an outside Receive-Only
antenna's Balun up to my study where the receiver is.

The easiest thing for me is to run it alongside an existing (looks
like coax, but am not sure) wire that Comcast has strung for my
broadband service to the PC. Actually to their always on modem which
is then connected to the PC.

Was wondering about coax to coax noise transfer into the receiving
antennas coax from being right alongside this Comcast stuff.

Think there's any reason for concern ?

If so, worth the trouble to find a new route for the receiving
antenna's coax ?

The two cables running parallel together will cause them to couple
electromagnetically. There are a few way to minimize the coupling
between them.
1. Run them at right angles to each other.
2. Increase the space between them.

It is more likely that you will have a problem when the induced RF
current on the outer braid gets to the end of the radio receiver coax
and couples to the antenna then into the receiver input. It is less
likely that the cable TV cable noise will penetrate the radio receiver
coax.

--
Telamon
Ventura, California