Wahkiakum County, WA
147.020 +600kHz 118.8Hz
Grays River VHF Repeater
Location: The Grays River repeater is
located just south of Highway 4
near the crest of KM
about half-way between Naselle, WA, and Cathlamet, WA, in
Wahkiakum County. KM Hill is the highest point on Washington State Highway 4 between
Longview, WA and the Coast, dividing the county roughly in half.
Coverage: Also called the "KM Hill" or just
"KM" repeater, it provides
coverage to nearly all of Wahkiakum County, from County Line Park
at the east end, west along Hwy 4
into Naselle, at least to the junction with Hwy 401.
The Eden Valley area, in western Wahkiakum County,
is shadowed, but is well served by other
On the Oregon side of the Columbia River, it fills in coverage along
Highway 30 from west of Knappa to east of Westport, OR.
Normally linked to the rest of
this machine can be separated to operate stand-alone
or linked to the 444.500 Nicolai repeater, as desired
for ARES/RACES operations in Wahkiakum County. It provides a link
to the State ECC at Camp Murray, through the network, and acts as
a focus for Emergency Communications in this rural county.
There is a
generator at the site, for back-up power.
repeater consists of a
base station. The transmitter
signal passes through one
BpBr cavity and a
cavity, and then
feeds a Diamond dual-band
antenna at the 65-foot level
on the tower
which serves the repeater
and the UHF link transceiver
a diplexer, and 75-feet of
hardline. The repeater
receive antenna is a
high-gain Stationmaster at
the top of the 90-foot tower, fed
with LDF5-50 7/8-inch hardline,
with a single 8-inch BpBr cavity.
This two-antenna system allows
optimal receiver performance
with less than 1 dB combined loss.
If you can hear this repeater,
you can probably work it.
Packet Radio: The
radio node is located on this site
This is part of the 145.630
Washington District Three
EOC Packet Network.
The purpose of this node is to
provide a link between the
western portion of
the county and the county
seat in the eastern part.
Web Cam: for a look
at the road conditions on Hwy 4,
right outside the turn off to
the site access road,
Click Here for the WSDOT traffic cam.