[Elecraft] K3 birdies - question?

[James Sarte]

Hello Grant,

There are some that are strong enough that when the antenna is removed, they
can still be heard a little bit above the noise floor.  For the most part
however, removing the antenna or changing over to the dummy load removes or
masks them completely.

It really does sound like some sort of synth noise, but I can't explain its
behavior with the antenna.  They are always in the same places, and when you
tune up or down the band, the tones will change in pitch until you pass a
certain frequency.

73,
James KC2UEE

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Grant Youngman
Sent: Wednesday, March 04, 2009 1:08 AM
To: Elecraft Mailing List
Subject: Re: [Elecraft] K3 birdies - question?

What you're hearing aren't "birdies".  If they go away when you remove  
the antenna,  then obviously they're signals being picked up by the  
antenna from some source outside the radio.  Do you her them on  
another receiver connected to the same antenna?

Grant/NQ5T


On Mar 3, 2009, at 11:22 PM, James Sarte wrote:

> Dear group,
>
>
>
> At first I thought I did not have any noticeable birdies, but now it  
> seems
> that I have developed a few.  It's probably from moving cables and  
> such
> around inside the rig.
>
>
>
> When I tune quickly through a band, I can hear solid tones that  
> change in
> pitch as I move up or down in frequency.  The weird thing is, they  
> don't
> behave like I thought a birdie would.  In my case, disconnect the  
> antenna
> and the tone practically disappears below the noise floor.  Reinsert  
> the
> antenna, and it comes back.  Also, switching from my antenna on ANT1  
> to the
> dummy load on ANT2 or the RX connector removes the birdie as well.
>
>
>
> The NB has no effect, but the notch feature does.  For example,  
> moving the
> notch to 2700Hz wipes out a strong signal tone on 28.380
>
>
>
> I haven't tried the birdie mapping feature yet, so I thought I'd  
> ask. is
> what I'm hearing considered a birdie in this case, or just DDS  
> signal noise?
>
>
>
> 73,
>
> James KC2UEE
>
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