K2 noise

[Hans Johansson]

I have a problem with my K2. When I am listening to CW-signals
at my beatnote 700 Hz everything is OK. But when I tune to higher
or lower pitch it comes noise on the signal.It is more noticeable on
strong signals than on weak ones. I wonder if anyone have had this
problem and have any suggestions of solution or is it a shortcoming
of the K2 ? (Perhaps VCO noise). I have no transformer in the
neighborhood of the K2.

73 de  Hans  SM6BGA
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[Don Wilhelm-3]

Hans,

That effect can happen if your IF filter alignment is way off.  I suggest
aligning the filters using Spectrogram.  See the information for doing that
on the Builders Resouce section of the Elecraft website or look at the K2
Dial Calibration article on my website http://w3fpr.qrpradio.com .

When you are finished aligning the filters, you can observe the AF content
of an actual received signal with Spectrogram and determine if you still
have a problem.

73,
Don W3FPR

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Hans Johansson
> Sent: Wednesday, January 10, 2007 4:34 PM
> To: [hidden email]
> Subject: [Elecraft] K2 noise
>
>
> I have a problem with my K2. When I am listening to CW-signals
> at my beatnote 700 Hz everything is OK. But when I tune to higher
> or lower pitch it comes noise on the signal.It is more noticeable on
> strong signals than on weak ones. I wonder if anyone have had this
> problem and have any suggestions of solution or is it a shortcoming
> of the K2 ? (Perhaps VCO noise). I have no transformer in the
> neighborhood of the K2.
>
> 73 de  Hans  SM6BGA
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
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>

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