K144XV

[Fausto Coletti]

Today I installed the module K144XV. It all works ok but I noticed several spurious signals received, in particular each 12.5 kHz at a level
of around -140 dbm indicated on P3, plus some pretty strong signals such as at 144.4165 to S7 and others.
Obviously signals are present with the antenna disconnected and with a 50 Ohm load on the antenna connector.
I exclude the origin from the outside of the transceiver, I disconnected all possible noise sources such as switching power supplies and similar.
It 's normal or there may be a problem? Any suggestions?

Fausto IK4NMF
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[N5GE]

That sounds like a P3 cable problem.  There have been reports of
faulty BNC cables supplied in a batch that was bad from the supplier.

Try contacting Elecraft and describe the problem to them.

Also while you are waiting to call Elecraft over the week-end, make
sure that ALL of the cable routing is as it was before the
installation.  That covers any existing cables you may have moved
around.

Good luck,

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member




On Sat, 18 May 2013 18:41:53 +0200, "Fausto Coletti"
<[hidden email]> wrote:

>Today I installed the module K144XV. It all works ok but I noticed several spurious signals received, in particular each 12.5 kHz at a level
>of around -140 dbm indicated on P3, plus some pretty strong signals such as at 144.4165 to S7 and others.
>Obviously signals are present with the antenna disconnected and with a 50 Ohm load on the antenna connector.
>I exclude the origin from the outside of the transceiver, I disconnected all possible noise sources such as switching power supplies and similar.
>It 's normal or there may be a problem? Any suggestions?
>
>Fausto IK4NMF
>______________________________________________________________
>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

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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[Fausto Coletti]

Thank you for answer,

The spurious signals are not only visible on P3 but perfectly audible in the
speaker.
I have also tried turning P3 off and unplug it but the signals are always
present and audible.

Fausto IK4NMF

----- Original Message -----
From: "Tom H Childers" <[hidden email]>
To: "Fausto Coletti" <[hidden email]>
Cc: "'Elecraft Mailing List'" <[hidden email]>
Sent: Saturday, May 18, 2013 7:31 PM
Subject: Re: [Elecraft] K144XV


That sounds like a P3 cable problem.  There have been reports of
faulty BNC cables supplied in a batch that was bad from the supplier.

Try contacting Elecraft and describe the problem to them.

Also while you are waiting to call Elecraft over the week-end, make
sure that ALL of the cable routing is as it was before the
installation.  That covers any existing cables you may have moved
around.

Good luck,

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member




On Sat, 18 May 2013 18:41:53 +0200, "Fausto Coletti"
<[hidden email]> wrote:

>Today I installed the module K144XV. It all works ok but I noticed several
>spurious signals received, in particular each 12.5 kHz at a level
>of around -140 dbm indicated on P3, plus some pretty strong signals such as
>at 144.4165 to S7 and others.
>Obviously signals are present with the antenna disconnected and with a 50
>Ohm load on the antenna connector.
>I exclude the origin from the outside of the transceiver, I disconnected
>all possible noise sources such as switching power supplies and similar.
>It 's normal or there may be a problem? Any suggestions?
>
>Fausto IK4NMF
>______________________________________________________________
>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

73,
Tom
Amateur Radio Operator N5GE
ARRL Lifetime Member
QCWA Lifetime Member



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