Re: Antenna question
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I had 80 meter loop at my last home. It was great antenna. I used copper-clad steel for wire, ceramic insulators for corners, lexan homemade center connector, black dacron rope to hoist/secure corners and 450 ladder line to a 4:1 baun just outside the shack. The dacron seemed to give somewhat in the SW MO wind. Only had to put a corner back up couple times over 6 years. Hard part was getting back down when we moved. Feel free to contact me offline for vendors I used or more info.
P.S. one important investment I recommend is to build a spud gun to get line up in the trees. My XYL almost cracked a rib laughing at the other methods I tried before the spud gun.
72 – Ron – AG1P
From: 4sqrp@... [mailto:4sqrp@...]
Sent: Monday, December 29, 2014 10:40 AM
Subject: [4sqrp] Antenna question
I would like to get some input on building an 80 meter sky loop antenna that I will use on 80 and other bands with an antenna tuner. I have some nice tall pine trees to run the corners to and I plan on joining the loop to the house with 450 ohm ladder line. Just under the edge of the house I will install a balun and bring it into the house with low loss coax. Please make any comments or offer any advice you can. I am hoping to learn from your experiences. Some questions I have are:
- What kind of wire should I use for the loop antenna
- What type of rope that will hold up to the UV and time (so much just falls apart these days)
- What balun, 4:1, 1:1 ?
- Is 450 ohm feed ladder line the best to use? This part will be about 80 feet long.
- Has anyone ever had any issues using delrin for the insulators?
- I am thinking about placing a screen door spring on each corner to allow the trees to sway in the wind… anyone ever tried that. Or should I just counter weight to opposing corners of the loop?
- How’s the best way to protect this setup from lightning?