The 47 GHz Primary amateur band is surprisingly accessible courtesy of the availability of synthesisers and multipliers for simple transverters. Good distances are possible from hilltop locations (the UK record is >200km). Indeed, the technology is sufficiently mature that 47GHz can also be used as a talkback frequency for 76 and 134 GHz trials/contacts.
In the UK an annual 47GHz trophy is available, awarded by UKuG.
47GHz Transverter by Roger Ray G8CUB
Chris G0FDZ 47GHz transceiver
Dual band 47/76 GHz transceiver
Youtube 47 GHz QSOs
UKuG Millimetre Wave Contest 17-Jul-2016 - at Hackpen Hill IO91CL12
47GHz Crossband with 145 MHz Winchester Dec-2012
Roger G8GUB, 2013
47GHz Equipment Comparisons, Oct-2012, 75km from the Bell Hill Beacon
Chris G8BKE portable at Batcombe in Dorset - Sept-2013
(Whilst setting a new 76GHz 102km distance record as well)
See Record News
Some UK 47GHz webpages
Beacons - 47GHz Beacon map
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