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Hi Tim:<br>
<br>
I think you were referring to LMR-400 Coax.<br>
<br>
Since this coax has a 100% foil shield, and copper braid, you should
be in good shape.<br>
The 100% foil shield is the key item.<br>
<br>
The foil will block most of the AC RF noise.<br>
When you do have to Cross over some AC wires, try to cross them at a
90 degree angle.<br>
Try to avoid running parallel to AC power cables when possible.<br>
Also Distance is good, stay as far away from AC cable as possible.<br>
I don't think you will have any issues AC noise penetrating the foil
shielded cable.<br>
<br>
enjoy<br>
Miles<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/9/2023 9:35 AM, Tim KC1RET wrote:<br>
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<font face="Verdana">Greetings,<br>
<br>
I'm contemplating the placement of the aptly named
'Franken-beam' and one of the likely locations would require a
coax run (AMR400) the length of my house. One of the easier
routes is through the unfinished attic space (approx 40ft).
There is an HVAC air-handler and an attic fan in the space but
it is otherwise unused.<br>
<br>
I'm wondering if I am inviting QRM from devices in my house,
power lines, etc. with such a run. I would elevate it by
running along the peak rather than along the floor, mostly to
avoid someone stepping on it or 'critters' noshing on it.<br>
<br>
73,<br>
<br>
T.<br>
</font>
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