[Lowfer] xsv in EN90xn

Mon Nov 2 10:51:09 EST 2015

John

As a long time (back to the beginning) user of WSPR I have to take exception with some of your 
justifications for poor operating practices. Some misc. points below ... not in any particular 
order. I'm not trying to rain on anyone's parade here.

WSPR.net is up and working probably > 99% of the time. This means one can see in real time (not 
review the next day) what frequencies are currently in use.

Just because someone used a frequency yesterday does not mean it's available today. Check the 
database before firing up.

Those of us that are interested in DX propagation find it annoying for a US station to show up a 
cycle or two away from a DX station - especially since the DX station started transmitting on that 
frequency hours earlier! Again, check the database and  look at the spots by other EU stations and 
remain clear of their frequencies.

Note which stations have a known history of accurate frequency readouts and use their spots as a 
frequency guide.

Frequency stability does not appear to be an issue ... only one station  I normally see exhibits any 
drift. If you have poor frequency stability consider staying off the air.

Always consider using a lower transmit duty cycle. Ask yourself if you really need to transmit 50%, 
40%, 30% ... or even 25% to probe propagation.

Transmit stations that are close by receiving stations (as indicated by gigantic signal levels on 
WSPR.net) should run very low transmit duty cycles and even consider taking a night off once in a 
while!

Jay W1VD  WD2XNS  WE2XGR/2

----- Original Message ----- 
From: "John Langridge" <kb5njd at gmail.com>
To: "Discussion of the Lowfer (US, European,& UK) and MedFer bands" <lowfer at mailman.qth.net>
Sent: Monday, November 02, 2015 9:42 AM
Subject: Re: [Lowfer] xsv in EN90xn

> >provide such nice listings of the decodes why the ops don't spread out and
> not step on each other.
>
> Its actually quite challenging from an operational standpoint.  The
> activity page on wsprnet is very poor.  Sometimes it is slow to update and
> sometimes stations with low TX cycle never show up at all.  When you add to
> this harmonic decodes which complicate the reported freq average (I had a
> large number last night due to wet local condx) the numbers reported for
> frequency are not worth very much.  And most of us do a batch review of the
> previous session the day after unless we are explicitly using WSPR to seek
> QSO conditions so we don't often know if there is co-location unless we are
> told during the session.
>
> There are also numerous obstacles in the passband, carriers from plasmas
> that cause people to make minor shifts and one prolific wideband pair
> around .635 spanning to at least .645 that is worldwide 24/7.
>
> If you add frequency instability, which I have due to shack temp variations
> and an exciter that cant be GPS locked, it only adds to the chaos.
>
> The passband is getting busy, guys sometimes move not realizing they are
> moving too close to people.  A month or so ago one station made a 10 hz
> move and it forced a major readjustment for everyone.. Its a good problem
> to have and it will only get worse as more stations come online.
>
> 73!
>
> John KB5NJD / WG2XIQ
>
> On Mon, Nov 2, 2015 at 7:51 AM, Garry <k3siw at sbcglobal.net> wrote:
>
>> FB Mike! I also got an XSV decode, but only once, and a few from VE7
>> BDQ, though less than usual. The reason for that is despite BDQ having
>> used 475740 Hz for quite some time, WH2XRR came up on exactly that
>> frequency a couple days ago and at least last night was running a 50% duty
>> cycle to boot. Can't understand when "
>> http://www.wsprnet.org/olddb?mode=html&band=2190&limit=50&findcall=wg2xsv&findreporter=&sort=date"
>> and "http://www.wsprnet.org/drupal/wsprnet/spots" provide such nice
>> listings of the decodes why the ops don't spread out and not step on each
>> other. There's plenty of room in the 200 Hz WSPR bandwidth since only a
>> dozen or so stations are currently active.
>> --
>> Garry, K3SIW, EN52ta, Elgin, IL
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