You are right, Jim, wider spacing is REQUIRED. From the ARRL Antenna Book:
“The line should be kept away from other conductors including downspouts, metal
window frames, flashing, etc. by a distance of two to three times the line
spacing.”
Ken WA8JXM
> On Dec 23, 2014, at 12:16 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
> On Tue,12/23/2014 9:07 AM, Tom Osborne wrote:
>> HI All
>>
>> I've seen that you should keep the 450 ohm twinlead at leas the width of the
>> cable away from anything metallic. Does that include coax cable?
>
> YES! And although I haven't seen any math to support it, I'd want wider
> spacing than that.
>
>> I want to run some twinlead out to an antenna and where it would come into
>> the shack is a coax cable and it would be laying right on top of it.
>>
>> Just wonder it that would cause any problems.
>
> Yes, it could cause problems.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|