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
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Download the latest SWB issue |
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SWB Archive - issues from May 1999 |
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SWB 40 års jubileum |
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Dateline Bogotá Library 1993 - 1998 compiled by Henrik Klemetz |
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Peru on shortwave - Peruvian stations heard 1992 - 2002 compiled by Henrik Klemetz |
Antennas
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How to build a reversible Flag-antenna by Thomas Nilsson |
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ALA100 special designed antenna without Wellbrook amplifier by Thomas Nilsson |
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Wellbrook ALA100 large aperture loop, User review by Alan Gale, G4TMV |
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OH2BEN reversible Beverage Antenna, building instructions |
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K9AY Loops by Gary Breed, Array Solutions |
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How to build the K9AY loop by Gary Breed, Array Solutions |
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"Medium-Sized" Low Band RX Antenna Solutions by Gary Breed, Array Solutions |
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Beverages: How short can they be? AY-Technologies |
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Beverage Antenna Tips by N1EU |
Baluns, Ferrite cross reference, etc.
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How to make a great 9:1 RX transformer by Gary Breed, Array Solutions |
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Fabricating impedance transformers for receiving antennas, 2001 by John Bryant |
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A second look at fabricating impedance transformers, 2003 by John Bryant |
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Impedance matching transformers for MW and lower SW, final, 2003 by John Bryant |
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Ferromagnetic materials & cores, Ferrite cross reference, core size, etc |
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Toroidal Core Application Worksheet (zipped Excel) by Mark Connelly |
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
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Wellbrook Comunications, Various Loop antennas & part supplier |
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Array Solutions, AS-AYL-4, K9AY antenna system |
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Far Circuits, Receiver preamplifiers, K9AY loop antenna kit |
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Clark Electronics, Flag & Pennant Transformer KB-5 |
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Radioware, Pennant Antenna Kit, Transformer & Resistor kit |
Component suppliers for Beverage antennas
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Array Solutions, Beverage and K9AY antenna systems |
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Clark Electronics, Beverage antenna transformers |
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DX-Engineering, Beverage antenna feed systems, amplifiers, voltage couplers |
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ICE, Industrial Communication Engineers, Beverage matching units |
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Misek Antenna Research, Baluns, clips and FET's, The Beverage Antenna Handbook |
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Radioware, Two direction Beverage antenna system |
Perseus
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Perseus Markers Guide by Niels Schiffhauer (in German) |
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Perseus Markers Guide by Niels Schiffhauer (in English) |
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Perseus Markers Guide by Niels Schiffhauer (in Italian) |
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SciDAVis & several Perseus Markers (<= ver 2.1h) by Thomas Nilsson (in English) |
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SciDAVis Win 7 settings for Perseus markers.log import by Thomas Nilsson (in English) |
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Perseus Markers import guide (ver 2.1i) for Excel by Thomas Nilsson (in English) |
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) |
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DX Engineering RPA-1 HF-preamplifier, DX-Engineering manual |
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DX-Engineering BFS-1 Single Beverage antenna matching system, User manual |
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DX-Engineering RBSA-1P Reversible antenna system, User manual |
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Clifton Laboratories Norton HF Amplifier Z10040B Assembly & Operation Manual |
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Pre-Amp Peregrinations AR2/RPA-1 HF-preamps on DXing.Info, by John Bryant/Mark Connelly |
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I.C.E. 180 Beverage matching transformer |
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DX-Engineering Beverage Feed System BFS-1 + I.C.E. 185 matching transformer |
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/. | |
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Recording in USB from Dec 09, 2345-2349 UTC (2,9 mb) |