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

John w1xq at yahoo.com
Wed Sep 27 18:55:57 CDT 2023


Venkata, you and I have the same radio and antenna!

On His Majesty’s Service
73 de W1XQ
Coastwatcher Reenactment 
RANVR


> On Sep 27, 2023, at 6:14 PM, Venkata Appala <pradhanavs at gmail.com> wrote:
> 
> Hello everyone, 
> Thank you for the quick replies. Sorry, was driving home and couldn’t reply earlier. 
> 
> About the radials, they are 14ft each copper wires. Thanks for the suggestion about extending them. Will try to build more in the coming weekend’s.
> 
> On the radio, it’s a Yaesu ft710. I am using the dnr but last weekend was worse. I just went back and took down the antenna to figure out what’s going on.
> On the power, I need to look into it this weekend. I am using a surge protector connected to powerwerx supply. Will try to connect directly and see if that’s the culprit.
> About the inverted antenna, I need to explore this option. Should be a good learning experiment.  
> 
> Venkata Appala
> 
>> On Sep 27, 2023, at 6:06 PM, Rick Hiller <rickhiller73 at gmail.com> wrote:
>> 
>> Venkat,
>> What is ur radio?
>> Rick. W5RH
>> 
>> Sent from my i-Thingamajig
>> 
>>>> On Sep 27, 2023, at 5:14 PM, John Pate via BVARC <bvarc at bvarc.org> wrote:
>>> 
>>> 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
>>>> ________________________________________________
>>>> Brazos Valley Amateur Radio Club
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>>>> 
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>>> 
>>> 
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> 
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