[Elecraft] KX3/PX3 Lines on the screen

[Dale Boresz]

Also, if you are fortunate enough to have a QTH that enables an unusually
low noise floor, engaging the preamp should push the 'lines' below the
noise floor.

73,

Dale - WA8SRA

> Bill,
>
> That's normal and nothing to worry about as band noise covers it.  There
> was a posting about this before, that I can't locate just now.  It is
> mainly from internally produced noise from the switched mode regulators in
> the PX3 apparently.
>
> 73 from David GM4JJJ
>
>> On 20 Jun 2016, at 04:21, Bill Frantz <frantz at pwpconsult.com> wrote:
>>
>> Probably I'll kick myself for asking a dumb question, but here goes.
>>
>> Receiving on a dummy load, I am getting a pattern of lines on the PX3
>> screen with my KX3. There are 5 strong lines and 2 week lines
>> symmetrically on either side of the green bar (tuned frequency). When I
>> tune the KX3, they move with the green bar. They move down by about 8
>> KHz when I switch RX SHFT to 8.0 from NOR. The closest lines to the
>> tuned frequency are about 12 KHz above and below it. The other lines are
>> not evenly spaced, but are spaced about 3-6 KHz apart. Turning RX ISO on
>> has no effect.
>>
>> When I attach an antenna, I get normal results from signals on the band.
>> The signals are not distributed symmetrically they way they would be if
>> the I/Q cable was not inserted all the way on the PX3 and KX3. (And I
>> pushed really hard too.)
>>
>> Any ideas of what is going on? Any way to "cure" it?
>>
>> Thanks in advance.
>>
>> 73 Bill AE6JV
>>
>> -----------------------------------------------------------------------
>> Bill Frantz        | Since the IBM Selectric, keyboards have gotten
>> 408-356-8506       | steadily worse. Now we have touchscreen keyboards.
>> www.pwpconsult.com | Can we make something even worse?
>>
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