Graham
If you wind a 150mH loading coil for me I could be on next day !! I have
already resonated my LF antenna for 8.9 Khz using small ferrite core loading
coils and signal generator. It works and is also hot on RX
I need a big coil to handle a QRO amplifier which I already have. I can
guarantee you a signal
mal/g3kev
----- Original Message -----
From: "Graham" <[email protected]>
To: <[email protected]>
Sent: Saturday, July 14, 2012 8:06 PM
Subject: Re: LF: LF OP32 to VK??
> ''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/7820982
76/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir=asc
>
> --------------------------------------------------
> 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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