[BVARC] Signal noise and suggestion on how to reduce it
ke5qy at att.net
ke5qy at att.net
Wed Sep 27 16:49:36 CDT 2023
Hi Venkata,
Vertical antennas are noisy because most man-made noise is vertically polarized. An inverted V on 20 meters with the apex at the top of a 6-foot fence and the ends about a foot above the ground will be quitter and may even give you better coverage. You can make a fence tip antenna out of a few dollars' worth of wire and have some fun.
I have good luck nation wide with my fence mounted antenna and a hundred wats. And best of all , my HOA has no idea I'm a ham.
Look up NVIS antennas on the internet. There is a lot of info on these low wire antennas.
Nick, KE5AY
-----Original Message-----
From: BVARC <bvarc-bounces at bvarc.org> On Behalf Of Venkata Appala via BVARC
Sent: Wednesday, September 27, 2023 4:28 PM
To: bvarc at bvarc.org
Cc: Venkata Appala <pradhanavs at gmail.com>
Subject: [BVARC] Signal noise and suggestion on how to reduce it
Afternoon,
First of all, thank you for all the responses to my last email about antennas. I have another question related to the same topic and looking off some guidance. I normally setup my hf antenna for weekend use in my backyard. It’s a mfj 1979 17ft vertical. It is mounted on a flag pole rod that I just hammer into the soil close to the backyard fence. I have two sets of 4 radials in 180 degree pattern since I have a fence on the other side. When I use the rig expert to check swr, it’s always around 1.15-1.2. While the we is very low, the noise is crazy high. Most of the stations are extremely noisy. For some reason, I was able to hear really well few weeks ago. Is this something I am doing wrong or something to do with propagation ?
For the above setup, I am always on 20m ssb. I do have few metal trellis hanging near to the antenna few ft away but I am not sure if they cause any interference.
Disclaimer: I don’t know how to read the noise level on my radio yet, apologies if this is the most basic thing I should have known before I do anything. Trying to learn as quickly as I can 😄
Thanks,
Venkata Appala
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