[Elecraft] Possible phase noise question...

Per-Tore Aasestrand ptaa at ieee.org
Tue Jul 1 10:17:17 EDT 2014


But why will not the K3 filters take care of any too wide signals
coming from the SignalLink?
.

On 1 July 2014 16:11, David Cole <dave at nk7z.net> wrote:
> Hi,
>
> We are starting to focus on the Signalink soundcard itself...  I can't
> imagine it is the Elecraft K3 failing, as a dead carrier does not cause
> the spray, only when audio is being supplied to the transmitter, and
> only when from the Signalink, does the problem happen...
>
> --
> Thanks and 73's,
> For equipment, and software setups and reviews see:
> www.nk7z.net
> for MixW support see;
> http://groups.yahoo.com/neo/groups/mixw/info
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> http://groups.yahoo.com/neo/groups/dopplergram/info
> for MM-SSTV see:
> http://groups.yahoo.com/neo/groups/MM-SSTV/info
>
>
> On Tue, 2014-07-01 at 14:49 +0100, Ian White wrote:
>> >
>> >That indicates to me that your soundcard ADC is being overdriven, or
>> >that you have a bad soundcard.
>> >
>> >73,
>> >Don W3FPR
>> >
>>
>> The sound card could also be overdriven if another unrelated program has
>> changed the settings.
>>
>>
>> 73 from Ian GM3SEK
>>
>>
>>
>>
>> >-----Original Message-----
>> >On 7/1/2014 1:02 AM, David Cole wrote:
>> >> Here is a bit more info on the issue...
>> >>
>> >> If my friend moves his frequency just out of the radio passband, as
>> >> shown on the P3, the problem go away...  The base noise level drops
>> back
>> >> down to normal...  Only when his signal is within the passband as
>> shown
>> >> on the P3 does the base noise level rise...  I also narrowed the
>> filter
>> >> down to eliminate his signal, and as soon as his signal movers out of
>> >> the pass band, the problem ends...
>> >>
>> >> Is it just that the K3 is not dealing with his signal levels?  This
>> >> happens when he is running 5 Watts, and he is 1/2 mile from me...
>> >>
>> >
>>
>
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