Birdie ?

[TR K2 #838]

Dear Kindly List Members,

Thanks for alerting me this is not normal.

Yes, I do have enough savy to take the antenna off, and yes, even
with a dummy load there is no difference.  It is something internal
in the K2/100.

If no one on the list has any idea what is causing it, I'll drop a
note to Gary, Don, or one of the other Elecraft experts.

Thanks,

TR, WB6TMY

---------------------------------------------------------------------------------------
 >I am showing a very strong signal at 3590 KHz - is this normal ?
 >
 >Thanks,
 >
 >TR, WB6TMY


Tel: . . . [phone]

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[Geoffrey Mackenzie-Kennedy]

You are correct in saying that the birdie is being generated inside the K2.
What is happening is that the fundamental or a harmonic of some oscillator
inside the K2, or a mixture from two or more oscillators, is equal in
frequency to one of the many spurious response frequencies of the K2's
receiver (or any other receiver) when the receiver is tuned to 3590 kHz. I
could tell you which oscillators are involved if I had my notes here, but
must warn that the cure is painful. This is not an unusual problem if
shielding and lead filtering is not used to keep the 'gremlins' at bay. Most
birdies can be eliminated but it is usually a very painful task if the
design is 'open plan'.

73,
Geoff
GM4ESD


----- Original Message -----
From: "K2/100 S/N 838" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, July 16, 2008 8:03 PM
Subject: [Elecraft] Birdie ?

> Dear Kindly List Members,
>
> Thanks for alerting me this is not normal.
>
> Yes, I do have enough savy to take the antenna off, and yes, even with a
> dummy load there is no difference.  It is something internal in the
> K2/100.
>
> If no one on the list has any idea what is causing it, I'll drop a note to
> Gary, Don, or one of the other Elecraft experts.
>
> Thanks,
>
> TR, WB6TMY

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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   

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Elecraft web page: http://www.elecraft.com

[Russ Tobolic]

I don't work 80 meters very often but I just checked my K2/100 and I have
the very same strong birdie.  I never noticed this before and have had the
radio for 4 years.  Let us know what you find out.

Russ, N3CO
----- Original Message -----
From: "K2/100 S/N 838" <[hidden email]>
To: <[hidden email]>
Sent: Wednesday, July 16, 2008 3:03 PM
Subject: [Elecraft] Birdie ?

> Dear Kindly List Members,
>
> Thanks for alerting me this is not normal.
>
> Yes, I do have enough savy to take the antenna off, and yes, even with a
> dummy load there is no difference.  It is something internal in the
> K2/100.
>
> If no one on the list has any idea what is causing it, I'll drop a note to
> Gary, Don, or one of the other Elecraft experts.
>
> Thanks,
>
> TR, WB6TMY
>
> ---------------------------------------------------------------------------------------
> >I am showing a very strong signal at 3590 KHz - is this normal ?
> >
> >Thanks,
> >
> >TR, WB6TMY
>
>
> Tel: . . . [phone]
> _______________________________________________
> 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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Subscriber Info (Addr. Change, sub, unsub etc.):
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Elecraft web page: http://www.elecraft.com