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Re: [TowerTalk] 300' of line

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 300' of line
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 5 Aug 2016 10:14:02 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On Fri,8/5/2016 9:15 AM, Bill Cotter wrote:
Look for "tag-ends" (end of reel) of PVC coated aluminum hardline from the cable TV installers. Uncovered aluminum is also good stuff, but needs to be kept off the ground.

I have received thousands of feet of 1/2" and 7/8" for free to haul it away. The best time to find it is when installers are replacing the old lines, or putting in new stuff. 75-ohm line works great for antennas that are far away from the shack.


Excellent advice, Bill. I inherited a big spool of 1/2-in hardline from N6RZ's estate -- I was told to "haul it away." I'm using it for long runs to 50-ohm monoband antennas for 20, 15, and 10M.

When used with 50 ohm antennas, it's best used in whole-number multiples of a half wavelength at the operating frequency. The good news with that is that because many of our bands are harmonically related, there are physical lengths that satisfy that requirement for a tri-bander that covers the 20, 15, and 10M bands.

And many hams forget that a high dipole is a lot closer to 75 ohms than 50 ohms, so 75 ohm coax is a better match.

73, Jim K9YC

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