To: | rsgb_lf_group@blacksheep.org |
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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> |
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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 MalBut 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 usageG.. |
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