A 10 GHz contact by Rex Moncur VK7MO and Derek Zeck VK6DZ over an astounding distance of 2,732 km is a new record for the 10Ghz band
The contact took place on January 5, 2015 during a tropo opening across the Great Australian Bight using the JT4f data mode as well as SSB.
VK6DZ was portable at Torbay Hill, 24 km west of Albany, Western Australia. He was running 10 W to a 60 cm dish. VK7MO was portable Cape Portland in northeastern Tasmania, running 50 W to a 77 cm dish.
Read the full ARRL story - http://www.arrl.org/news/view/new-world-record-claimed-on-10-ghz