Re: LF: MF acty

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

Yes  G wave  is  very constant  , I can  obtain  decodes  using  ros-mf-2 
( -27  dB  ros/op  s/n scale  )  via the  delft  web-sdr  with  about  150 
watts  feed  to the  Ae , and  very  much  less  to  John in the  Shetland 
Isles , though  at  that  time  I have a  very high  local noise  level  , 
which  prevented  decodes .
And  with the  big loop  at  gb4fpr  600ft delta  , the  505  beacons  where 
good  copy  all  day  , with  Andy's  beacon   559 ..noise  is the  limiting 
factor  , 500  propagation  is very  good  , even  compared to  160  , which 
I think is why  600  mtrs   was 'pinched'  by the  marine  service  at the 
change  over  from  spark to carrier  wave  [ Mal may  have more on that 
one  :) ]

73 -G.
--------------------------------------------------
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
Sent: Wednesday, September 05, 2012 4:19 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: MF acty

> MF,
>
> Here i've made a diagram showing the SNRs as a function of time of those 
> stations who received me on 477 kHz since this day.
> It shows clearly that the groundwave path must be very stable over the 
> daytime and seems to be limited to less than 500km. There are stations who 
> are continually monitoring the QRG but as soon as the sunrise comes, no 
> signals are detected in the UK while the levels are 25 dB above the decode 
> limit in the night.
> So far there were no TA decodes during the last night. I think i will run 
> the TX for another 24 hours in that mode. I'm looking forward to the 
> effect of different RX locations when the sun goes down in some hours.
> The diagram is here: https://dl.dropbox.com/u/19882028/MF/OP4SNR.png
>
> 73 and tnx to the RX stations!
>
> Stefan/DK7FC
>
>
>
>
> Am 05.09.2012 01:36, schrieb Graham:
> > Stefan
> >
> > G..
> >
> > Monitor: VE1VDM Loc FN85IJ
> > Frequency: 0.477 MHz (600m)
> > Using: Opera v1.4.3/Rptr V1.6
> > Antenna: RX Op4
> > Show all seen by VE1VDM
> > Last report: VE1VDM
> > at Tue, 04 Sep 2012 23:29:12 GM
> >
> > --------------------------------------------------
> > From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
> > Sent: Tuesday, September 04, 2012 11:56 PM
> > To: <rsgb_lf_group@blacksheep.org>
> > Subject: Re: LF: MF acty
> >
> > > MF,
> > >
> > > Thanks to PA3ABK for the QSO!
> > >
> > > Maybe i'll be back in CW tomorrow. At least i will run OP4 on 477 kHz 
> > > over the night, now that the system is resonated to MF and the TX is 
> > > ready to go...
> > > 73, Stefan/DK7FC
> > >
> > >
> > > Am 04.09.2012 21:24, schrieb Stefan Schäfer:
> > > > Hi Vernon,
> > > >
> > > > Am 04.09.2012 21:13, schrieb vmath@eastlink.ca:
> > > > > I will listen....will u have enuff little watts to make it across the 
> > > > > pond..
> > > > Yes, i think so. But i don't know when the band opens to your location. 
> > > > Maybe you will hear me. If so, pse give me a feedback.
> > > > 73, Stefan
> > > >
> > > >
> > > > > Vern
> > > > > Sent on the TELUS Mobility network with BlackBerry