''Coupled with this, there are relatively short periods of very good
conditions amongst the QSB which could be taken advantage of by a
faster speed.''
Mike,
That's the $64,000 question , is there enough burst time in the
cycle to exceed the -40 dB lower threshold , but -40 is the average
along the time line , like stocks and shares the signal can move up
and down , round this point , the same dsp engine is decoding at -50
dB at 4 hours in the experimental 8KHz mode , still waiting for MAL
to sort his licence out (HIHI) we have the 600 ft loop this side of
the hill.
I believe the path loss is in the order of 40 dB , so who knows ,
Gary crossed the Atlantic with 300 watts to a 30 ft top loaded
vertical, using OP8 ,looking at the screen captures 10 dB variation
in signal can be seen
But I think there will be a lot of stations tuned in during the
tests, what ever the outcome !
73 -Graham
http://groups.yahoo.com/group/O_P_E_R_A_/photos/album/2031588689/pic/782098276/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc
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From: "Mike Dennison" <[email protected]>
Sent: Saturday, July 14, 2012 4:41 PM
To: <[email protected]>
Subject: Re: LF: LF OP32 to VK??
So do you and others think there will be a chance compared to
DFCW-180? The next VK season may start in 6 weeks or so...
73, Stefan/DK7FC
Op32 has been tested as roughly equivalent to QRSS10, so would be
unlikely to produce a good enough signal/noise for DL-VK.
The dilemma of LF DX: is that you need to use a very narrow bandwidth
to get the S/N, so you need a very slow mode. However, the periods of
good conditions are not open for very long, so you need a faster
mode.
Coupled with this, there are relatively short periods of very good
conditions amongst the QSB which could be taken advantage of by a
faster speed.
Ideally you need a mode that will accumulate the results from several
periods of good reception over a few hours or even over several days.
Mike, G3XDV
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