Re: [HCDX]: Re: que. for prop. gurus

["T. Bankson Roach" <comint@xxxxxxxx>]

I'd love to see whatever you have from FT. Thanks.

Tom Roach

----- Original Message -----
From: KC7LDP <kc7ldp@xxxxxxxxxx>
To: <hard-core-dx@xxxxxxxxxxxxxxxx>
Sent: Friday, March 31, 2000 11:19 PM
Subject: Re: [HCDX]: Re: que. for prop. gurus


> I can't contribute a web address but, I can say that I have ALL copies
of
> FT's 'Proceedings'. If anyone wants part of any year, please let me
know.
> John, David, Guy and others were instrumental in doing heavy research
with
> propagation to the Indos's and PNG's; I believe it was called the
'Sweet
> Spot'. Please let me know if anybody needs this info.
>
> Terry, KC7LDP
> ----- Original Message -----
> From: <Delibert3A@xxxxxxx>
> To: <hard-core-dx@xxxxxxxxxxxxxxxx>
> Sent: Saturday, April 01, 2000 3:37
> Subject: Re: [HCDX]: Re: que. for prop. gurus
>
>
> > It has not been my experience that high solar numbers necessarily
mean
> poor
> > tropical band DX.  DXing from the U.S. east coast, I find that the
> magnetic
> > field is the main thing to watch.  When it's very quiet, propogation
is
> > usually good from PNG and Indonesia in our local morning, especially
in
> the
> > spring and fall.  (It has been observed by Bryant and Clark that the
> signals
> > are strongest from the area on the equator where it's about 9 - 10
p.m.
> local
> > time.)  When the field is disturbed, local morning propagation of
Asians
> may
> > be poor, or it may move to other regions, sometimes to the north
(Vietnam,
> > Laos, China) and sometimes to the West (Andaman Islands, Bangladesh,
> India,
> > in fall and winter).  When there are major storms, weird things can
> happen,
> > and some very unexpected stations from the Western Pacific may pop
up.
> >
> > Reception of Indonesians is also possible on the East Coast in our
local
> > evening, from September to about April.  Best reception has been
found to
> > occur when there has been a major solar flare, but the magnetic
shock has
> not
> > yet arrived.  (Those conditions can produce some spectacular morning
> > reception of Indonesians here also.)
> >
> > Solar flux levels affect this too.  In my experience, when they are
really
> > low (75-100), the ionosphere seems almost dead, and I don't hear
much from
> SE
> > Asia even when the magnetic field is very quiet.  When the flux
level gets
> up
> > to 150 or more, the ionosphere comes alive.  But, when solar flux
gets
> even
> > higher, it contributes a level of background noise that can mask
some weak
> > signals.
> >
> > There are some very good articles on tropical band propagation by
John
> > Bryant, Dave Clark, and others in the Proceedings series of books,
> produced
> > by Fine Tuning in the late 1980s and early 1990s.  I think copies
are
> still
> > available, but I'm not sure where to get them.  Maybe someone
reading this
> > can contribute a web address?
> >
> > Hope this helps.
> >
> > Regards,
> > Art Delibert
>
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