Re: LF: Re: FR5ZX on MF WSPR

[John Langridge <jlangridge@sbcglobal.net>]

To take Fausto's comments a step further to real time application, over here we use  WSPR to determine the propagation patterns, QSB and peaks and coordinate in real time for CW skeds in the ON4KST chat.  When we see numbers -10 to -12 db S/N we know we can make something happen usually.. better than -10 db means we can actually chat and have usually have several meaningup exchanges.  WSPR is a very good tool for these determinations. 

It can be an better solution than endless calling if properly applied between the stations trying to make the QSO.

Good luck!  I have collected screen shots and WSPR data for last night's session and will post a report later this evening.

73,

John KB5NJD / WG2XIQ..

---

From: Fausto Coletti <faustocoletti@alice.it>
To: rsgb_lf_group@blacksheep.org
Sent: Sunday, November 1, 2015 8:42 AM
Subject: Re: LF: Re: FR5ZX on MF WSPR

Hi Stefan,

 

beyond the technical aspect that is certainly is the most important thing, there are people like me

who operated in the microwave bands and especially EME that, sometimes hunted a new one for months

before being able to make the qso that, certainly does not scare me a few hours of calling...

Technology has made giant steps and, systems like WSPR  for the study of the propagation,

bring us to knowledge phenomena that we would not have discovered otherwise but, the charm of an

old CW two way QSO is unsurpassed in my opinion.

Surely it was an exceptional condition that I do not think happen again many times during a year but,

the perseverance finally always pays.

 

73, Fausto

 

 

 

----- Original Message -----

From: DK7FC

To: rsgb_lf_group@blacksheep.org

Sent: Sunday, November 01, 2015 2:41 PM

Subject: Re: LF: Re: FR5ZX on MF WSPR

Hi Fausto,

Normal CW would have been possible last night! There were 90 decodes by FR5ZX last night. The best reports from last night are:

Timestamp	Call	MHz	SNR	Drift	Grid	Pwr	Reporter	RGrid	km	az
2015-10-31 22:30	PA0A	0.475725	-20	0	JO33de	2	FR5ZX	LG78pu	9511	135
2015-10-31 23:46	DK7FC	0.475684	-12	0	JN49ik	1	FR5ZX	LG78pu	9095	137
2015-11-01 00:12	DF6NM	0.475785	-20	0	JN59nj	1	FR5ZX	LG78pu	8974	139
2015-10-31 23:58	DJ0ABR	0.475665	-25	0	JN68nt	0.2	FR5ZX	LG78pu	8830	140
2015-10-31 23:42	DH5RAE	0.475753	-27	0	JN68qv	0.5	FR5ZX	LG78pu	8826	141
2015-10-31 23:12	IZ7SLZ	0.475777	-27	0	JN80nu	0.01	FR5ZX	LG78pu	7941	143

You know, a few weeks back i've tested the readability of a signal at -6 dB and -16 dB. -6 dB was fine for a normal speed (100 Bpm) CW QSO. -16 dB was barely audible, not fine for a QSO, maybe a call can be copied when repeated a few times. So i think that -12 dB should be fine for a QSO at 60 Bpm and some concentration... But it was just a short moment within 4 hours. Not sure if someone want to call CQ for such a long time to make a "599tu" QSO then :-)

73, Stefan

PS: Could someone provide more statistical overview of last nights results?



Am 01.11.2015 12:09, schrieb Fausto Coletti:

Hi Stefan,

 

-14 dB !!!

Virtually with 10 dB extra power you would get an audible CW signal...at 9000 Km WOW.

 

 

73, Fausto IK4NMF

Nessun virus nel messaggio.
Controllato da AVG - www.avg.com
Versione: 2015.0.6173 / Database dei virus: 4455/10926 - Data di rilascio: 01/11/2015