[Elecraft] K3: birdie on 3,721

[Dave G4AON]

Hello Lexa

No sign of any spurious signals on my K3 on 3.721 MHz... No idea what 
the problem with your K3 may be.

73 Dave, G4AON
K3/100 #80
----------------

Hello all,

before raising this question to support team I want ask for your
experience/opinion.
K3/10, 2.7 - 2.1 - 0.4 filters, latest fw

On 80m band I have strong (S5) birdie on 3,721MHz, LSB mode
(testing without ant)
But... when I switch BW from FL2 (2.7) to FL1 (2.1) it completely
dissapears. Like switched off...
Is it some issue of not so good screw fastening somewhere or is it
common "problem"?
Any other reports?
Thanks for any ideas...
73!
Lexa, ok1dst