Shortwave Central
Welcome to Teak Publishing's Shortwave Central blog. This blog covers shortwave frequency updates, loggings, free radio, international mediumwave, DX tips, clandestine radio, and late-breaking radio news. Visit my YouTube and Twitter links. Content on Shortwave Central is copyright © 2006-2026 by Teak Publishing, which is solely responsible for the content. All rights reserved. Redistribution of these pages in any format without permission is strictly prohibited.
Friday, October 03, 2025
Russian pirate station from Belarus active on 3940 kHz
Finland's RealMix Radio ready for weekend broadcast
2024 QSL from RadioMix Rado |
Trans World Radio nears Guam closedown on October 25
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KTWR Guam transmitters |
UK Propagation Update
RSGB
Encore classical music from Radio Tumbril
New Season of Calling All Radio Nutzz (CARN) Begins in October
Jen and GB announce the new season of CARN.
Wednesday, October 01, 2025
October programming from Texas Radio Shortwave
Blog Logs - October 2025
6070 CFRX. 0115. Canadian news topics to conversations for a fair signal. (G Van Horn) YT video from CFRX at SW Central YouTube, 27 May 2025: https://youtu.be/IXPxZ6bRUDE
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Classic QSL from Voice of Korea |
Monday, September 29, 2025
ShortwaveService Announces Closures on December 31, 2025
Radio Prague International, part 1
Entrance to Vinohradska Street in 1936 |
Telegraph
Building and Transmitter Hall at Podebrody in 1936 |
This unit was designated with the callsign OLR, which over the years has appeared on many of their QSL cards.
Sunday, September 28, 2025
Weekly Propagation Forecast Bulletins- September 29, 2025
Graphic design by Gayle Van Horn |
Solar activity reached R1 (Minor) levels on 23, 24, 26 and 27 Sep and R2 (Moderate) levels on 28 Sep. Region 4217 (S16, L=209, class/area Cko/250 on 22 Sep) produced an M1.1 flare at 23/1034 UTC with an associated Type II sweep with an estimated shock velocity of 835 km/s. On 24 Sep, Region 4224 (S14, L=205, class/area Dso/060 on 26 Sep) produced an M1.0 and an M1.6 flare at 24/0931 UTC and 24/1913 UTC, respectively. An M1.6 flare was observed from behind the E limb at 26/2001 UTC with an associated Type II sweep with an estimated shock velocity of 778 km/s.
The latest - Jen's Eclectic Views & Real Deal audio now available
Graphic design by Gayle Van Horn |
SW Radiogram schedules
Saturday, September 27, 2025
Special repeat programming from UBMP on September 28
Jen's Eclectic Views & Real Deal set for September 28
Friday, September 26, 2025
WRMI schedule repost
Pop Shop Radio broadcast schedule
U.K. Propagation Update
Thursday, September 25, 2025
When Weather Bends FM Signals
A Closer Look at Trans World Radio-Bonaire
TWR - Bonaire |
TWR's Original 500 kW Continental Medium Wave Transmitter |
Later, two shortwave
transmitters were added – one at 50 kW and one at 250 kW – and they were used
mostly to broadcast Spanish, Portuguese and German programming to South
America, and English programming to North America with an expanded schedule on
Sundays. Diesel generators were also
installed to provide the power necessary to operate all the equipment.
But as time went on,
the costs associated with operating and maintaining such high-power tube-type transmitters
forced them to cutback. In the late
1980’s, the power output from the 250 kW shortwave transmitter was reduced to
100 kW, and then in 1993, all shortwave broadcasting from TWR Bonaire
ended. In 1998, the 500 kW medium wave
unit was replaced with a 100 kW one, a Nautel NX100, and the diesel generators
were taken out of service. The station
still had twice the power on medium wave of any station in North America, but it
was nothing like the flame thrower it had once been.
But the following year, in 1999, a new medium wave antenna was designed by Tom King of Kintronics Labs in Bluff City, Tennessee, who also engineered and installed it. The design utilizes four 478’ tall active towers at the four corners of a rectangle, which through selective termination can be used to create three different directional antenna patterns – one for the Caribbean, Venezuela and Colombia, one with a beam to the north west for Cuba, and a third with a beam to the south east that reaches much further down into the Amazonia region of northern Brazil. By using this new antenna, TWR aimed to maximize the impact of the 100 kW transmitter.
TWR Bonaire Directional Medium Wave Antenna at Night |
They had many loyal listeners, but by the early 20-teens, it was apparent there was still a need for higher power. The station said they had a lot of people in Cuba asking if they could increase the power again to cover the whole island with Christian programming on medium wave. So, they launched a new project, and over a period of about four years, managed to raise almost $4 million for the purchase and operation of a new high-power solid-state transmitter.
Coverage Patters of the Three Antenna Beams |
The NX400 with TWR Engineer Matt Folkirt (N3FLW) |