[Lowfer] Using Argo

[Eric Smith]

Thanks to everyone for all the good info on this thread.

I used Jay's reading on Mitch's signal and found I was .13 Hz high.
So, where I had 137000 entered as my offset, I subtracted .13 and
entered 136999.87 ... which had desired and undesired results:

On the desirable side, I have Mitch at 137780.48 Hz, same as last night.

On the undesirable side, the log on the right-hand side of the screen
is no longer nice integers ... I have numbers going up the scale like
"137778.87, 137779.37, 137779.87", and etc.

Probably a really easy way to fix this ... but I'm missing it ....

Lastly, so far the only signal I have copied is Mitch's ... however I
don't have a serious LF antenna in the air at the moment, only the
G5RV.  I am working on getting one raised, though.

And I will keep listening ...

Eric KD5UWL



On Dec 5, 2012, at 6:41 PM, Bob <vk7zl at internode.on.net> wrote:

> On the R-75, CW-R is the same as USB (the User Manual is incorrect) so tuning up in freq causes the signal to go down on the display and as we are not chasing signals it is somewhat irrelevant.
> With SpecLab that effect is overcome by using a negative offset value.
>
> I seem to recall that both Wolf and Alberto advising against using filtering of the signal, the filtering is done within the software, provided the correct bandwidth is setup.
>
> Bob  VK7ZL
>
>
>
> On 5/12/2012 22:20, Douglas D. Williams wrote:
>> Well, I see no reason why your method of using SSB USB mode would not work
>> with the R-75.
>>
>> I have encountered a few situations, however, where narrow filters helped
>> my QRSS reception. One example for me is the 185.300 kHz USA Lowfer
>> "watering hole". I have a strong PLC very close to this frequency, so close
>> that it is within the passband of my R-75's narrowest CW filter (250 Hz). I
>> notice a distinct improvement in QRSS reception resolution on this
>> frequency, using ARGO, when I use my Winradio SDR and set the filter width
>> to 150 Hz or less. So yes, at least for me, there are times when it is
>> advantageous to use a narrow filter (I.F. audio, or software defined)
>> filter before sending the data on to Argo (or Spectran or Spectrum Lab) for
>> QRSS decoding.
>>
>> LF is different that 30 meters.
>>
>> 73, Doug KB4OER
>>
>>
>>
>>
>> On Wed, Dec 5, 2012 at 3:49 AM, Bob <vk7zl at internode.on.net> wrote:
>>
>>> Thanks for the replies but I can see no valid reason for using either CW
>>> or CWR mode and there is no advantage in using the narrow CW filters.
>>> I use Argo and SpecLab and in both cases I use USB and tune 1KHz below the
>>> centre freq. of the display.
>>> For 30M I tune 1300Hz below which allows me to run WSPR and QRSS at the
>>> same time.
>>>
>>> Bob  VK7ZL
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> --
> LF/HF QRSS Grabber: http://tinyurl.com/26callh
>
> NDB & Navtex Logging: http://tinyurl.com/255zfm2
>
>
>
>
>
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