[TowerTalk] 450 ohm feedline and coax
patrick_g at windstream.net
Tue Dec 23 15:22:00 EST 2014
Try to pas by any nearby conductive objects at or as near as possible to
a right angle to help minimize coupling.
On 12/23/2014 1:12 PM, Ken wrote:
> 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 at 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 at contesting.com
More information about the TowerTalk