[BVARC] Signal noise and suggestion on how to reduce it

John Pate w1xq at yahoo.com
Wed Sep 27 17:13:25 CDT 2023


I am using the same type of antenna. The MFJ 1979. I have mine mounted on my metal fence in the backyard. I do have noise but since I got a new radio, the filter knocks it out and I am able to get good copies on everything. Check things like your power supply and cut the power off in the house and see if the noise drops at all.

On His Majesty’s Service
73 de W1XQ
Coastwatcher Reenactment
RANVR
Amateur Radio Lighthouse Society #182
 

> On Sep 27, 2023, at 4:49 PM, Nick Creason KE5QY via BVARC <bvarc at bvarc.org> wrote:
> 
> 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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