Re: LF: Re: FR5ZX on MF WSPR

[Markus Vester <markusvester@aol.com>]

Somewhat belated, here's a simple SNR plot of Michel's exceptional receptions last Saturday night. We can see that there was significant QSB but also some shorter steady periods, but it remains questionable whether using WSPR-15 would provide the expected 9 dB gain.

 

All the best,

Markus (DF6NM)

-----Ursprüngliche Mitteilung----- 
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 1 Nov 2015 2:44 pm
Betreff: 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

FR5ZX_WSPR_detections_151031-1101.png
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