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K144XV spurious in receiver

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Robert P. Ward

K144XV spurious in receiver

Hi group

I've just installed a K144XV in my K3 and using 2.77
firmware.

I have found some spurious response at the bottom end of the band (144.0 to
144.010).

Wondering if anyone else has noticed this?

Also have found the "S" meter is very inaccurate, reads 20
over S9 with -70 dBm input signal.

I've found the K144XV to be quite sensitive as measured with a HP 8640B
signal generator......

Bob NQ3N

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Brett Howard

Re: K144XV spurious in receiver

Yea I'm hearing quite a few spurs from 144.0 to 144.004 and then of
course it repeats from 146 to 146.004...

~Brett (KC7OTG)

On Fri, Mar 19, 2010 at 12:05 PM, Robert P. Ward <[hidden email]> wrote:

> Hi group
>
>
>
> I've just installed a K144XV in my K3 and using 2.77
> firmware.
>
> I have found some spurious response at the bottom end of the band (144.0 to
> 144.010).
>
> Wondering if anyone else has noticed this?
>
> Also have found the "S" meter is very inaccurate, reads 20
> over S9 with -70 dBm input signal.
>
> I've found the K144XV to be quite sensitive as measured with a HP 8640B
> signal generator......
>
>
>
> Bob NQ3N
>
>
>
> ______________________________________________________________
> 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
>

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Guy, K2AV

Re: K144XV spurious in receiver

You can use the procedure for removing spurs that already exists.

The S meter is calibrated to the front end of the HF receiver. The
system gain of the K144XV (including its preamp) will be added to the
calibration of the HF receiver. 20 over would seem to be
approximately right. -70 is 3 db over S9.

73, Guy.

On Fri, Mar 19, 2010 at 8:10 PM, Brett Howard <[hidden email]> wrote:

> Yea I'm hearing quite a few spurs from 144.0 to 144.004 and then of
> course it repeats from 146 to 146.004...
>
> ~Brett (KC7OTG)
>
> On Fri, Mar 19, 2010 at 12:05 PM, Robert P. Ward <[hidden email]> wrote:
>> Hi group
>>
>>
>>
>> I've just installed a K144XV in my K3 and using 2.77
>> firmware.
>>
>> I have found some spurious response at the bottom end of the band (144.0 to
>> 144.010).
>>
>> Wondering if anyone else has noticed this?
>>
>> Also have found the "S" meter is very inaccurate, reads 20
>> over S9 with -70 dBm input signal.
>>
>> I've found the K144XV to be quite sensitive as measured with a HP 8640B
>> signal generator......
>>
>>
>>
>> Bob NQ3N
>>
>>
>>
>> ______________________________________________________________
>> 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
>>
> ______________________________________________________________
> 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
>

Brett Howard

Re: K144XV spurious in receiver

Yea I'll have to go through and map out all of my spurs... Seems to me
with the level of integration that this 2M radio has that soon its
S-meter will be individually calibratable or even better it would be
nice to be able to insert an offset for each transverter so that you can
match things up...

~Brett (KC7OTG)

On Sat, 2010-03-20 at 00:38 -0400, Guy Olinger K2AV wrote:

> You can use the procedure for removing spurs that already exists.
>
> The S meter is calibrated to the front end of the HF receiver. The
> system gain of the K144XV (including its preamp) will be added to the
> calibration of the HF receiver. 20 over would seem to be
> approximately right. -70 is 3 db over S9.
>
> 73, Guy.
>
> On Fri, Mar 19, 2010 at 8:10 PM, Brett Howard <[hidden email]> wrote:
> > Yea I'm hearing quite a few spurs from 144.0 to 144.004 and then of
> > course it repeats from 146 to 146.004...
> >
> > ~Brett (KC7OTG)
> >
> > On Fri, Mar 19, 2010 at 12:05 PM, Robert P. Ward <[hidden email]> wrote:
> >> Hi group
> >>
> >>
> >>
> >> I've just installed a K144XV in my K3 and using 2.77
> >> firmware.
> >>
> >> I have found some spurious response at the bottom end of the band (144.0 to
> >> 144.010).
> >>
> >> Wondering if anyone else has noticed this?
> >>
> >> Also have found the "S" meter is very inaccurate, reads 20
> >> over S9 with -70 dBm input signal.
> >>
> >> I've found the K144XV to be quite sensitive as measured with a HP 8640B
> >> signal generator......
> >>
> >>
> >>
> >> Bob NQ3N
> >>
> >>
> >>
> >> ______________________________________________________________
> >> 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
> >>
> > ______________________________________________________________
> > 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
> >