Thanks Earl. I will try the technique you mentioned, with my AM radio,
my most valuable tool at the moment.
Ramakrishnan, VU3RDD
On 10/2/06, Morse, Earl (E.A.) <emorse@ford.com> wrote:
>
>
> Most definitely a power line noise and one that is exposed to rain too.
>
> One technique that you can use to home in on the source is to use your
> AM radio and start with a clear frequency as high up in the bands as you
> can go and still hear the interference. As you get closer to the source
> and the noise gets stronger you can either go higher in frequency and/or
> select a weak station that you can hear the noise on.
>
> Then as the interference gets stronger and becomes more noticeable you
> can continue to find stronger stations and/or move higher in frequency.
> It is important to stay in the AM mode in order for the interference to
> be heard.
>
> Good luck in dealing with the utility but you will have a stronger
> position if you can locate the problem for them.
>
> Earl
> N8SS
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 30 Sep 2006 21:39:12 +0530
> From: "Ramakrishnan Muthukrishnan" <vu3rdd@gmail.com>
> Subject: [RFI] RFI all over the band
> To: rfi@contesting.com
> Message-ID:
> <23fcff0f0609300909m493a95b4q486ae58c7256758@mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Hi,
>
> I am Ramakrishnan, VU3RDD from Bangalore, India. For the past two
> months, I am experiencing unprecedented amount of RFI all over the
> amateur radio bands 40m, 20m till 10m at S9+10db level. I haven't
> checked upwards in the frequency. Virtually nothing can be recieved.
> It's also there in the broadcast bands as well.
>
> I live in a very densely populated area full of apartments. I am also
> in an apartment. To rule out any problems inside my house and also
> inside our apartment, I selectively switched off/on all the individual
> circuits including the lift (elevator) without any success. i.e. RFI
> didn't reduce at all. After reading some available material on the
> various webpages, I started roaming around our building and the area
> near the circuit breaker box is kept, with a battery operated AM radio
> tuned to a shortwave frequency where no station exist. I see that
> noise is strong almost everywhere inside our small compound wall, but
> I haven't found any specific source yet.
>
> Today it rained a bit and to my surprise I found that the noise level
> has reduced quite a lot from the S9+10 db that I was seeing. But once
> the rained stopped and water drained off, RFI is back to its usual
> S9+10 dB.
>
> I am completely clueless on how to find the source. I do not have a
> VHF/UHF AM equipment or DF antenna yet. Many webpages suggest using
> such equipment to locate the source. The power company here
> (controleld by the Govt) is not very helpful either. Infact I had
> already reported to them about the problem and no one turned up. This
> is usual practice in this part of the world.
>
> I would appreciate any help from experienced members of this forum. I
> think the rain was a good source of clue, but don't know how to
> proceed further.
>
> Thanks
>
> 73
> --
> Ramakrishnan - VU3RDD
>
>
> ------------------------------
>
>
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>
--
Ramakrishnan - VU3RDD
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