Re: LF: First MF TA since a longer time

[Andy Talbot <andy.g4jnt@gmail.com>]

-6dB in 2.5kHz is very audible

This utility I wrote a while ago generates CW / audio tones in specified bandwidth to listen to, and allows you to put custom filters around the signal.   http://www.g4jnt.com/SNDemo.exe   (just ignore any security warnings and just run it, I promise it won't harm your machine )

You'll see that down to about -14dB S/n (2.5kHz) is just about detectable as an audio tone - although I doubt many even experienced OPs  could read CW that low

Andy  G4JNT

On 25 September 2015 at 10:00, Fausto Coletti <faustocoletti@alice.it> wrote:

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

To: rsgb_lf_group@blacksheep.org

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

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