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KX3/PX3 Lines on the screen

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Bill Frantz

KX3/PX3 Lines on the screen

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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Re: KX3/PX3 Lines on the screen

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 <[hidden email]> 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?
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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dmb@lightstream.net

Re: KX3/PX3 Lines on the screen

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 <[hidden email]> 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?
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>