[Elecraft] Birdie ?

[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" <elecraft2 at radions.net>
To: <Elecraft at mailman.qth.net>
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