[Elecraft] 10m Birdie

[Tom Althoff]

Another wierd behavior of the 28020 birdy is that is tunes the opposite of a
normal cw signal and changes pitch in large steps.  I wonder if it is a
harmonic of the HV oscillator in the KPA-100 beating with something related
to the main tuning oscillator?

----- Original Message ----- 
From: "Russ Tobolic" <erusst at copper.net>
To: <elecraft at mailman.qth.net>
Sent: Monday, January 03, 2005 10:24 PM
Subject: Fw: [Elecraft] 10m Birdie


> I never operate 10M but just checked my K2 with the KPA100 and found the
> same thing with a strong birdie at around 28262.  The weird thing is that
> when I turned off the KPA100 (reducing power below 10W) the birdie at
28262
> shifted up about 1kc and the birdie at 28019 shifted down about 500c.
>
> Russ, N3CO
> K2 #4016
>
> ----- Original Message ----- 
> From: <W4FMS at aol.com>
> To: <elecraft at mailman.qth.net>
> Sent: Sunday, January 02, 2005 11:19 AM
> Subject: [Elecraft] 10m Birdie
>
>
> > "----In order to get a match at 28019 kHz as has been reported,=
> >  the KPA100
> > oscillator has to be shifted to 18434.1 ----"
> >
> > Hi also have the 28029 birdie.  I've also got the much stronger=
> >  28262
> > birdie.
> >
> > I've wanted to eliminate this for some time since there a lot of=
> >  cw activity
> > between 28025 and 28025.  My KPA100 is installed on the K2.  The=
> >  birdie
> > produces about 1 s unit bar with the pre-amp on.  Based on Sverre=
> >  comments,
> > how do I eliminate the birdie?  Is it merely the freq of the 18=
> >  MHz
> > oscillator.
> >
> > Frank, W4FMS
> >
> >
> >
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