Re: LF: MF propagation

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

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Hears  one  we  prepared    earlier  : ))

 

 

 

 

 

 

 

From: Stefan Schäfer

Sent: Tuesday, June 25, 2013 10:14 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: MF propagation

Hi Eddie,

Yes and it is not new and it has all been done in the past :-)

The feeder is 10mm diameter stainless steel. I guess it takes at least 300A before it melts :-) So the limit would be the withstand voltage of the ceramic isolator, even on MF :-)

73, Stefan

Am 25.06.2013 22:50, schrieb g3zjo:

Hi Stefan

Did you look to see if your feeder had taken one hour to melt? :-)
You know that WSPR's auto reporting is of no use at all and the quick QSO Mode 599 imi 599 is the preferred method.

73 Eddie

On 25/06/2013 20:56, Stefan Schäfer wrote:

MF,

I just saw this:

Timestamp	Call	MHz	SNR	Drift	Grid	Pwr	Reporter	RGrid	km	az
2013-06-25 19:48	DK7FC	0.475690	0	-1	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:42	DK7FC	0.475689	-2	0	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:36	DK7FC	0.475690	-2	0	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:24	DK7FC	0.475690	-8	-1	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:18	DK7FC	0.475690	-8	0	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:12	DK7FC	0.475690	-9	0	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 19:00	DK7FC	0.475690	-17	0	JN49ik	1	IW4DXW	JN64bw	563	151
2013-06-25 18:54	DK7FC	0.475689	-23	0	JN49ik	1	IW4DXW	JN64bw	563	151

I find it interesting to see that the propagation on 630m between JN49 and JN64, just 563 km, changed so rapidly and consistant from a non-decode to an SNR of 0 dB, i.e. by about 30 dB in one hour!

At EA2HB we can see now daily when the band opens from DL to EA and when it closes. A really useful software!

73, Stefan/DK7FC

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