Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: First MF TA since a longer time

To: [email protected]
Subject: Re: LF: First MF TA since a longer time
From: DK7FC <[email protected]>
Date: Fri, 25 Sep 2015 12:01:08 +0200
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
Hello Fausto,

Good quastion! I've made a quick test and reduced my TX power so i can receive me in my garden at -6 dB SNR. I then switched to CW and recorde a wav file. So the background noise is real (not coming from a signal generator), but it's daytime noise...
Listen: https://dl.dropboxusercontent.com/u/19882028/MF/CW%20bei%20-6dB%20WSPR_AF.WAV
The first half is at -6 dB, the second at -16 dB (in 2500 Hz).
So, the first part is how John/W1TAG would have heared me last night :-) It is no problem for a CW QSO. The seconds part is barely audible but very hard to understand. You could say "i hear you but i cannot read you"...

But the thing is that such good propagation is VERY (!!) rare! The chance is very small that you can make a sked and get such a good propagation just during the time you want to make a QSO. December or January is the best time for attempts i think. But you will need a good antenna and loads of power :-)

73, Stefan

Am 25.09.2015 11:00, schrieb Fausto Coletti:
Hi Stefan,
 
a wspr -6dB sgnal is audible ?
The question is this: with this condition and if necessary a bit more power it is possible a cw qso?
 
73, Fausto IK4NMF
 
 
----- Original Message -----
From: DK7FC
Sent: Friday, September 25, 2015 10:41 AM
Subject: Re: LF: First MF TA since a longer time

Hi all,

Last night there were excellent condx on 630m on the TA path! G8HUH, F5WK and DK7FC managed to be decoded in above 5000 km in WSPR.

I've got exceptional good SNR reports!:

Timestamp Call MHz SNR Drift Grid Pwr Reporter RGrid km az
 2015-09-25 04:52   DK7FC   0.475683   -23   0   JN49ik   1   WG2XKA   FN33lq   5970   297 
 2015-09-25 04:32   DK7FC   0.475683   -16   0   JN49ik   1   WD2XSH/17   FN42pb   5927   294 
 2015-09-25 04:32   DK7FC   0.475684   -6   0   JN49ik   1   W1TAG/1   FN43sv   5789   296 
 2015-09-25 00:32   DK7FC   0.475683   -5   0   JN49ik   1   TF3HZ   HP94ad   2440   323 

-6 dB by W1TAG/1 means that many weaker stations could have made the path as well, in that time slot!

73, Stefan

Nessun virus nel messaggio.
Controllato da AVG - www.avg.com
Versione: 2015.0.6140 / Database dei virus: 4419/10695 - Data di rilascio: 25/09/2015

<Prev in Thread] Current Thread [Next in Thread>