ARLA/CLUSTER: California Radio Hams reclama recorde mundial em 77 GHz

[João Costa > CT1FBF]

California Radio Hams claim 77 GHz world record

The *ARRL* report mountain-topping radio amateurs in California are
claiming a new world distance record on the 77 to 81 GHz band.

The claimed record was set June 13 between *Robert Johnson, KF6KVG*, on a
peak just east of San Jose and *Goran Popovic, AD6IW*, in Kings Canyon
National Park to the east-southeast.

“We achieved a distance of *252.49 km* from Mt Hamilton (CM97di) to Kings
Canyon National Park (DM06ms),� Goran, AD6IW, announced on the 50 MHz & Up
Group reflector. “We made two-way contact on FM and SSB with strong signals
at both ends.�

KF6KVG used a 1-foot dish, and AD6IW a 2-foot dish. Both employed
dielectric resonator oscillator-locked frequency control for extreme
stability. The current E band record is 228 km, set in Germany between
Philipp Prinz, DL2AM, and Alexander Wetzel, DL2GWZ.

According to ARRL CEO David Sumner, K1ZZ, this amateur band was first
allocated internationally in 1979 as 75.5-81 GHz, with 75.5-76 GHz primary
and the remainder secondary.

When allocations below 76 GHz were realigned at WRC 2000, 75.5-76 GHz was
deleted, 81-81.5 GHz was added as secondary, and the primary allocation was
shifted to 77.5-78 GHz although only 77-81 GHz is available currently to
amateurs in the US.

Sumner says the band 77.5-78 GHz is under consideration at WRC 2015 for an
allocation for automotive short-range radar, leaving the fate of the
amateur primary allocation uncertain.

Fonte: ARRL
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