[Elecraft] KIO2 noise problem

[Scott T Emery]

	Alas, I am still having the same trouble even after moving the
antenna away.  If I find out what the problem is, I will email the list.

Scott Emery
emery@nas.nasa.gov

>
>        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
>>
>>