Welcome to Tropical band

To most people the phrase "tropical bands" bring a pretty clear picture to mind - a bunch of shirtless guys playing calypso music. But to experienced shortwave DXers those two little words express the most challenging and enjoyable part of the radio hobby. The phrase kindles memories of a DXer's best catches and favorite QSLs, of exotic stations, music and of early morning listening sessions. (Don Moore)
I like the "Tropical band" name for new 60m allocation. (OK1RP)

Effective from 1st Jan 2017 please paper QSL via OM-bureau only.


Sunday, July 17, 2011

60m band CODAR - update 17/7/2011

Hello all,

I am happy to forward the great news as follows...

According to:


http://cordc.ucsd.edu/projects/mapping/maps/


the final CODAR was moved from 60M today !


We should all get on channel 4 tonight and celebrate !


Thanks to everyone that sent in reports and helped get this removed.


Richard - K6RBS

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Howdy all,

As of today Rutgers University CODAR team has moved all eight of their sites from 5.375 MHz which was causing us the 60 Meter interference, to 4.900 MHz thus solving the problem.

A hearty thanks to Josh Kohut, Ethan Handel and the rest of the Rutgers CODAR team for their support and cooperation in testing and taking action to solve our 60 Meter interference problem.

Thank you Gentlemen !

An equally hearty thanks goes to everyone who participated in the monitoring, data gathering and reporting that led to the success of this effort.

At the beginning of this effort I received reports from Costa Rica, Hawaii, Alaska, Wake Island and other distant locations. I'm not sure if the problem has been solved at these locations since I didn't receive monitoring information during our test periods but if you are still plagued by CODAR on 60 Meters you might try contacting the Ocean Sciences department of your local University and discuss the problem with them.

If the CODAR is no longer causing interference at the distant locations then that is evidence of the phenomena propagation characteristics on 60 Meters which we noted during our test periods.

73 & the best of 60 Meter DX to all of you.

Dan Welch - W6DFW
Official Observer Coordinator
ARRL Orange Section
Email: arrl.ooc@apex-scientific.com
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I would like to send big thanks to all who contributed to solve the problem and decreassed the QRM on the 60m band, specially to:

Dan Welch - W6DFW,
Richard - K6RBS,


Thank You guys - You made great job for all of us !


73 - Petr, OK1RP

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