Am 25.07.2012 15:51, schrieb Graham:
Pity nothing decoded in the US last night , but signal 's in 1500
/2000 mile range where quite substantial ...
from this , it seems that propagation on 136 is really linked to
the seasons ?
Yes (of course) and no. W1VD received me quite well a few weeks ago, see
https://dl.dropbox.com/u/19882028/LF/07_July2012.jpg
Not to forget W1TAG: https://dl.dropbox.com/u/19882028/LF/DK7FC_Juli2012.jpg
So there is some propagation in summer but of course it depends on the
solar activity. Don't know how the condx have been yesterday.
One point from previous trials , If Spec-lab is used with
Opera , then SL must be set to 48Khz sample rate , or OP can
loose low level decode sensitivity.
Why do you think so? As long as the frequency range of a SSB bandwidth
at audio levels passes through the SL filter, then it should be fine. So
8 kHz SR should be fine. Of course it depends on which shift frequency
you have to use. I have to use 11 kHz shift and so i choosed a SR of 30 kHz.
73, Stefan
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