Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: slow WSPR?

To: rsgb_lf_group@blacksheep.org
Subject: LF: slow WSPR?
From: Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>
Date: Tue, 11 Sep 2012 01:09:50 +0200
Cc: Edgar J Twining <edgarjtwining@virginbroadband.com.au>
In-reply-to: <C9ACD81E93F141A5BE9599F0CC2C512F@AGB>
References: <jkp3nmqlpqmk94117kayy8vf.1347228233637@email.android.com> <504E0AD2.7020205@freenet.de> <001b01cd8f77$a9b4a1c0$0501a8c0@xphd97xgq27nyf> <C9ACD81E93F141A5BE9599F0CC2C512F@AGB>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: owner-rsgb_lf_group@blacksheep.org
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
It's a pity that there is no slow-WSPR, e.g. needing 32 minutes or so. 
If WSPR (2 minutes FSK) is about as efficient as OP8 ( i heared so), 
then it should be a real alternative to the slow DX modes on LF but not 
on MF!
There is a software that plays recorded audio files in a faster mode, so 
that QRSS becomes audible. VE2IQ has reported to me last year about it 
but i don't remember the name.
Would it be possible to make our own slow WSPR by using that software 
and playing a 32 minute manipulated WSPR at 16x speed, feeding it to the 
normal WSPR rx software? The slower code could be generated outside the 
program. Would that be a useful test or do i miss something?
73, Stefan/DK7FC

Am 10.09.2012 19:26, schrieb Graham:
May be  Mal

But once again Jim has the answer to this problem ..if you can find his articles after Google trashed the uk500khz news group ,
I think Jose R  predicts a  6  dB gain  by  changing  to  PSK  from 
the Opera  on/off  keying  but  that  would  prevent  most  of the  
LH/MF usage
G..


<Prev in Thread] Current Thread [Next in Thread>