


Shortwave Bulletin is produced
in Sweden basically in Swedish, but contributions are normally
presented in original language, so you will find all Scandinavian
languages as well as English in this bulletin.
Quality is the key word. SWB publish information of interest
to the experienced DX-er. This is not a forum for the newcomer to
shortwave. SWB is published every second week. We welcome new active members.
To achieve membership: Contact the editor and give us a short
introduction. The SWB
board has the right to accept or turn down applications
for membership.
Key benefits of the membership is the guarantee to receive the best
and hottest DX news as fast and regularly as possible. Your personal
printed hard copy is produced and mailed same day as deadline day! Within
a few hours after deadline (normally 0800 UTC Sundays) - a pdf-version is already there for you in the mail.
HF Propagation
What do the figures mean in the table below: High solar flux (solar flux is expected to begin rising from 65 up to >200 when the next solar maximum is expected in May 2013), high A-Index (> 10), high K-index ( > 5) due to geomagnetic storms, also proton events and polar-cap absorption are bad news; giving poor long-distance reception of medium wave and tropical band stations, especially affecting paths over polar areas and paths east/west of your location. For instance Polar-cap absorption can completely wipe out signals in polar areas for several days.SWB - Shortwave Bulletin
Antennas
Baluns, Ferrite cross reference, etc.
Noise, RFI reduction
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A Ham's Guide to RFI, Ferrites, Baluns and Audio Interfacing |
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På Störningsjakt i en vanlig villa av Bengt Falkengren (in Swedish) |
Component suppliers for K9AY, ALA100, Flag & Pennant antennas
Component suppliers for Beverage antennas
Perseus
Receiver modifications
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NRD-515 modifications by Thomas Nilsson (in English) |
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NRD-515 Options 1+2 instruction manual (filter board & PLAM board) |
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NRD-525 modifications by Thomas Nilsson (in English) |
Recordings
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K9AY demo recording (ram-file) & corresponding article at DXing.info by Guy Atkins |
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Flag Antenna reversal 1566 kHz, 2010-06-09, direction 210/300/30/120, 20 sec each |
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Flag Antenna reversal 1566 kHz, 2010-06-08, direction 300/120, 20 sec each |
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Flag Antenna reversal 1566 kHz, 2008-09-18, direction 30/210, 20 sec each |
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3905 R New Ireland, Oct 3 2008 recording from Christoph Ratzer, Austria |
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3905 R New Ireland, Jan 6 2009 recording from Christoph Ratzer, Austria |
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Voyager 1 time compression |
| ARC-Morokulien | Radio Symban | |
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| ARC-Morokulien at 23.47:41 UTC, Dec 27 2009, dominating the frequency! Best reception in USB during the entire transmission. | Radio Symban Febr 15, 2010 at 1918 - 1930 UTC. Note the instable carrier. Very weak audio but enough to compare to their webstream http://www.radiosymban.com.au/. | |
Recording in USB from Dec 09, 2345-2349 UTC (2,9 mb) |