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Aussie Hams Set New 76/78 GHz Down Under Distance Records:

from The ARRL Letter on June 12, 2014
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Aussie Hams Set New 76/78 GHz Down Under Distance Records:

On May 13, Alan Devlin, VK3XPD, and David Smith, VK3HZ, set and subsequently extended the Australian 76/78 GHz distance record on both SSB and digital (WSJT/JT65C) modes. Their initial contacts were over a 64 km (40 mile) line-of-sight path. SSB Reports were 57 to 58, while and the digital contact signals were -14 dBm both ways. These records were subsequently extended to 90 km and 127 km later that same day.

On May 15, VK3XPD and VK3HZ further extended these records to 139.8 km (87 miles) over a line-of-sight path in less-than-ideal weather conditions. Devlin said a lack of accessible high mountainous terrain makes it very hard to find line-of-sight paths greater than 150 km, so he believes the current world record of 252 km is unlikely to be challenged by Australian radio amateurs.

VK3XPD is hoping to make a short presentation on the hardware used to achieve these records at the Microwave Update, October 24/25. -- Thanks to Alan Devlin, VK3XPD


The ARRL Letter

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