[Elecraft] Six meter birdies.

[Giuliano]

I had some birds using a switching Power supply.I have no birds, with a 
linear Power supply.
 I have also noted some birds if cover has removed.
73
Giuliano I0CG
K3 # 1814

-----Dr. Werner Furlan wrote:----------------------- 


hi all, 

I am also suffering from birdies especially (but not only) on 6m. 
I have them on the main receiver and on the subreceiver, but on different 
frequencies. (found them on 40m and 20m too)
Many of them are low volume and don't bother me in real life, but some are 
really loud (up to S6) and show a microfonic effect when I tap on the cover 
of the K3. On the loudest one I can also hear a ticking sound when I turn the 
VFO back and forth over the birdie reagion. The intensity can be tuned with 
touching or taping on the synthesizer board and sometimes touching the 
koax cables makes a difference. 

Two friends of me with K3's also have similar birdies, one worse, one less.
One K3 from another ham friend does not show them. 

Of course all my coax cables are connected, the shield of the cables is ok 
and all screws of the K3 housing are tight. Different routing of the coax 
cables does not help, and btw, with the limited space after adding the KRX3 
there are not so many possibilities left to route the cables.