[Elecraft] Broadcast band interference

[Chip Stratton]

At one QTH (Key Largo) I have noticed a problem similar to Tom's with the
KX3. On a number of quiet bands, I can just hear a broadcast station whose
volume is not affected by spinning the VFO. It wasn't a real problem so I
didn't make an effort to eliminate it. The nearest AM broadcast antenna I
can find with an online antenna search engine is 13 miles away on the
mainland, however there is a large tower only one mile away - I just can't
find an AM station that is broadcasting from it.

In any event I have experienced what he is talking about. Don't know if
using IF shift would have eliminated it.

Chip
AE5KA


On Tue, Jan 8, 2013 at 3:28 PM, Mel Farrer <farrerfolks at yahoo.com> wrote:

> Hello Tom,
>
> I find it hard to understand how AM broadcast station in the lower BC band
> could be your problem.  I am thinking since you have the problem on the
> higher bands, it might be overload from the SW BC bands also on AM where
> propagation is the cause of the randomness of the interference.  I would
> use your KX3 to tune the adjacent SW bands when you have the interference
> and see if any of them sound the same. Or better yet use another SW
> receiver to compare the audio content.
>
> Also, if you insert the ATT does the interference go away??  Once you
> identify the source you can decide on what remedies are possible.  Just
> some thoughts,
>
> Mel, K6KBE
>
> --- On Tue, 1/8/13, Tom H Childers <n5ge at n5ge.com> wrote:
>
>
> From: Tom H Childers <n5ge at n5ge.com>
> Subject: Re: [Elecraft] Broadcast band interference
> To: elecraft at mailman.qth.net
> Date: Tuesday, January 8, 2013, 12:10 PM
>
>
>
> Check the addresses of your local AM radio broadcasters.  You may
> have one very close to you and not know it.
>
> Here's a way to find where and who the broadcaster is.
>
> If you have an AM radio in the house compare the signal on the KX3
> with those you hear on the AM radio to see if you can identify the
> station you're hearing.
>
> If a station is very close, you may have to use a filter at the shack
> end of the feedline to notch it out.
>
> On Tue, 8 Jan 2013 19:41:57 GMT, "w0ebb at juno.com" <w0ebb at juno.com>
> wrote:
>
> >I'm having occasionally issues with broadcast band interference on my
> KX3, SN. 564.  It seems to come in at random times throughout the day on
> multiple bands.  All of my antennas are tuned to the band I'm using them on
> and not just a random wire type.  I tend to see the problem mostly on 30,
> 20 and 17 meters. Any reason I'm getting this type of interference and is
> there any way I can take care of it or block it.  Sometimes it's loud
> enough to be a problem when trying to copy weak CW signals. Gary A. - W0MNA
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> 73,
> Tom
> Amateur Radio Operator N5GE
> ARRL Lifetime Member
> QCWA Lifetime Member
>
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