I did some spring maintenance on my antennas and need advice on how to get a 1.1 match. I have a radial plate with somewhere around 50 130' radials. I have 5 wire antennas attached to this and use an
If you are looking for 50 ohms at the feedpoint, the antenna you are using probably won't do it for you. Most verticals (no matter how many radials are attached to that plate) will have a feedpoint i
Gary, You are paying FAR too much attention to VSWR. If you had a perfect ground, it is NORMAL to have a feedpoint Z of 20-35 ohms for a vertical working against radials. The SWR values you've cited
I saw Jim's message just as I was typing. Your antennas are in the ballpark. Stop the incessant worrying and get on the air and make some QSOs. -- Wes Attaway (N5WA) (318) 393-3289 - Shreveport, LA C
Author: Edward McCann via TowerTalk <towertalk@contesting.com>
Date: Mon, 20 Jun 2016 20:45:59 -0700
Count your blessings. Chasing the elusive 1:1 with your set-up as described is not necessary will make your hair turn grey or white and need a Common Mode Choke. Get on the air!! AG6CX Sent from my i
Gary When you say "spring maintenance," are these existing antennas that exhibited 1:1 SWR at a previous time? If so, what changed? Or are these new antennas you have just installed? In that case, si
You can add a hairpin match to raise the impedance to 50 ohms however you would have to also adjust the vertical length after adding this. John KK9A I did some spring maintenance on my antennas and n
Thank you for the many replies both on & off list. It appears I will just have to let things be as they are. Being on a salt marsh, any storm that raises the salt water level excessively gets onto th
Author: J Chaloupka via TowerTalk <towertalk@contesting.com>
Date: Tue, 21 Jun 2016 19:06:27 +0000 (UTC)
It sounds like conditions are right for maintenance. Why not put in 350' of wooden fence posts to support the coax up and out of the water?JIM From: Gary Smith <Gary@ka1j.com> To: Towertalk@contesti
An auto tuner at the base just before the remote coax switch would certainly take care of any shifting SWR conditions. But I would anticipate it would require a DC power source. Just in case your thi
Gary, I had a similar condition to my 160 inv. L. Assuming no antenna performance improvement, but I added 1:2 Balun (25 to 50 ohms - UnUn) at the feeding point. Antenna V.S.W.R. seen from the shack