Message-ID: <CC34EAF76B38453C96FC35DD9A022349@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <5046503B.3050904@iup.uni-heidelberg.de> <836728322-1346785992-cardhu_decombobulator_blackberry.rim.net-2129170870-@b17.c17.bise6.blackberry> <50465556.5000909@iup.uni-heidelberg.de> <5046872C.90307@iup.uni-heidelberg.de> <CB3812FA614B42EDB5B6056683927536@AGB> <50476D85.7040909@iup.uni-heidelberg.de>
In-Reply-To: <50476D85.7040909@iup.uni-heidelberg.de>
Date: Wed, 5 Sep 2012 17:18:24 +0100
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Subject: Re: LF: MF acty
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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
>>>>>
>>>>
>>>
>