[Elecraft] K2 Strangeness on 160

[Bill Tippett]

Hi Don,

At 02:47 PM 11/9/05, you wrote:

>I just wonder how much energy that BC station is putting onto your beverage.

         I neglected to say the strongest image
(German language) was lighting 1 or 2 K2 meter
lights with preamp on (no external preamp in use).
I could hear it with all 3 Preamp/Attenuator settings
but of course it got weaker when switching through.

>Also it could be rectification in the antenna connections that is causing
>those occurrances - overlook nothing, especially the connections in the
>antenna itself.

         My ground rods were fairly short so I may
try changing them if I hear the image on another rig.

>It would be interesting to try another receiver on that beverage to see if
>anything similar appears.  What I am saying is that the problem may be
>somewhere outside the K2.

         That's my next step but my Orion is
a little bulkier <ggg> and needs a real power
supply.  I'm also curious to know if anyone
has heard the warbling sound (below) which
must be internal to my K2.  I'm trying to
understand if that is a generic problem or
unique to my K2 on 160.  I forgot to add that
the tone is only at discrete frequencies as you
tune across 160, and it seems to wander
around like a switching power supply birdie,
i.e. it is not at the same frequency every time
I check it.

                                 73,  Bill  W4ZV

> > 2.  I noticed with only the 50 ohm termination and
> > using battery power, I heard a drifty warbling tone that
> > reminded me of switching power supply birdies.  It
> > is not very strong, but noticeable with both RF and
> > AF gain near maximum.  I wondered it it could have
> > been my battery, so I tried a linear supply when I
> > got home but I still hear the same sound.  Again, it
> > sounded slightly worse when listening on the RX
> > antenna port than the Main port, although it was
> > clearly audible in both.  This is something that
> > can probably be verified in any unit since it seems
> > to be internal to the K2.