[Lowfer] Basic Argo settings?

Frank O'Donnell lfr at inkbox.net
Sun Sep 12 14:03:42 EDT 2021


On 9/12/21 8:26 AM, J D wrote:
> Re: BFO uncertainty; Argo itself is the quickest tool to tell you what 
> your receiver's internal offset is in CW mode, if you have no idea. 
> Switch Argo to NDB mode temporarily and view the noise band on screen. 
> The center of that band is your "BFO" frequency.

Thanks, John. It looks as though the answer in my case is 500 Hz.


> [A]s to mode, that depends on what you're wanting to hear/see.  At 
> 1750 meters, QRSS3 is not very effective. Most stations will be using 
> at least QRSS30 and some will be doing QRSS60.
>
> You can run multiple instances of Argo simultaneously to capture a 
> greater range of frequencies. But unless you're just curious as to 
> what you may see on a random basis, there's no point in setting 
> receiver bandwidth any wider than the span from the lowest frequency 
> where you expect to hear anything to the highest.  One kilohertz for 
> CW in a band like 1750 m is a potential waste of receiver dynamic 
> range when there's such a high risk of QRM in that wide a span.

I have to invoke the newbie defense -- I'm at the stage of not knowing 
what I want to do, beyond trying QRSS rx, particularly below 500 kHz. If 
I go with 185.3 kHz and QRSS30, is there a CW bandwidth I might try?

Also, while I'm waiting for the MF/LF bands to perk up this fall/winter, 
are there any suggestions for an active QRSS frequency and mode on HF I 
might experiment with to get some practice with Argo?

Thanks again,

Frank



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