[Elecraft] KIO2 noise problem

[Scott T Emery]

	You appear to have it there. 

	I disconnected the antenna from the K2 and hooked up the computer
as in test 4 and there was an acceptable (very low) level of computer hash.
The computer itself doesn't get into the K2 unless the serial line is connected
at both ends.  While I was feeding the test K2 antenna with coax cable, the
antenna itself was physically close to the computer and rig.  I will tried
again with a more distant antenna and the problem went away.

	The words at the top of page 18 in the KIO2 manual suddenly make
a lot more sense...

Thanks!!
Scott Emery
emery@nas.nasa.gov

"k4zm" writes:
In message <001401c3c749$05d0dce0$af0c3f44@S0027177816>, 
>Try disconnecting your antenna to the K2 and see if the nosie goes away.  It
>sounds like you have a very noisy computer and it may not be coming through
>the serial cable but instead radiated from the serial cable into the antenna
>input of the K2.  Are you using coax cable or balanced line into your KAT2
>antenna input?  Some computers are very bad about radiating hash.  Also try
>turning off the computer and see it the hash goes away.  If you are using
>balanced line right into the K2 you might consider using a 4:1 Balun and
>relocating the balanced line several feet away fromt the computer and use
>coax between the balun and the KAT2 input.
>
>73
>Jim Younce  K4ZM
>K2  SN: 18
>
>