Message-ID: <8DFB46D2142743769F56ACCA8DBD9687@AGB>
From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <BF4A524700075746A6467658DFC7102C886FDD74A2@ICTS-S-EXC2-CA.luna.kuleuven.be>,<DB8C28E831E94C75BBD3E810B0F518FC@AGB> <BF4A524700075746A6467658DFC7102C886FDD74A3@ICTS-S-EXC2-CA.luna.kuleuven.be>
In-Reply-To: <BF4A524700075746A6467658DFC7102C886FDD74A3@ICTS-S-EXC2-CA.luna.kuleuven.be>
Date: Sat, 20 Nov 2010 23:07:32 -0000
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Subject: Re: LF: 500kHz WSPR
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S1 ... Its   peaking  past 15 db over the  noise  floor at
my  QTH  .. oddly  no  false  decodes  , but that's  with
the ra6790  and  m-delta-4  sound card , may be
low  imd help's ..I dont  see  any  drop  in energy
to the  band edge ?

looks like  wspr  has entered a  new phase of  nonsense
on 500  with  stations transmitting  all over the  place
in and  out  of the  generous 501/504 allocation.
way  past the  b/w  of  any  tuned array to  track
not that  tuned  rx arrays are  desirable  on 500...

may  be  some  one  could  code a simple scan
facility to allow  frequency hopping to  keep  track
but  then  there  is the  time element , would
end up like spread spectrum on prozac , could
try  using  ham-radio delux in scan  mode
but  better  would  qsy linked to  clock
like  beacon-see ?

G.



--------------------------------------------------
From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
Sent: Saturday, November 20, 2010 10:26 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: RE: LF: 500kHz WSPR

>
> Graham,
>
> the QRM at the bottom end of the band does seemd too much harm to WSPR 
> signals, some nights ago I had  good copies of WD2XSH despite ithis QRM.
> The broadband transmission on 500kHz makes the noise level (at the bottom 
> end)  rising to S4  (it is about S1 at the top end), PA0A is booming S9++.
>
> 73, Rik  ON7YD - OR7T
>
> ________________________________________
> Van: owner-rsgb_lf_group@blacksheep.org 
> [owner-rsgb_lf_group@blacksheep.org] namens Graham 
> [g8fzk@g8fzk.fsnet.co.uk]
> Verzonden: zaterdag 20 november 2010 23:06
> Aan: rsgb_lf_group@blacksheep.org
> Onderwerp: Re: LF: 500kHz WSPR
>
> Nothing  compared to the  'Fog from Frog'
> covering that  end of the  band ....?
>
> wspr  never  was any  use on 500  due to  long tx times
> and high  local  ground wave  propagation , someone
> should  take a look at the  5 meg system and
> take note , one short  pulse , job done ..
>
>
>
> --------------------------------------------------
> From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
> Sent: Saturday, November 20, 2010 9:45 PM
> To: <rsgb_lf_group@blacksheep.org>
> Subject: LF: 500kHz WSPR
>
>>
>> Some time ago some USA WSPR TX stations moved from 503.9kHz on 501.1kHz 
>> to
>> avoid RX blocking of local WSPR RX station., This allowed both USA
>> stations (listening on 503.9) and  European stations (listening on 501.1)
>> to copy WSPR DX without RX blocking by local TX stations .
>> But I noticed that in the following time more and more USA WSPR RX
>> stations moved down to 501.1kHz too. And as a result some (at least one)
>> European WSPR TX station moved down to 501.1kHz too (to be copied by the
>> USA WSPR RX stations that moved down) and is now blocking the Europeans
>> listening here.
>> So it seems that the RX blocking problem is back :-(
>> I guess this was not the goal ...
>>
>> 73, Rik  ON7YD - OR7T
>>
>