Grays Harbor County, WA
145.390 -600kHz 118.8Hz
Cosmopolis VHF Repeater
As of May 6, 2014, the Cosi
repeater has been upgraded
and returned to the air,
once again ready to serve
the Amateur community.
Location: Overlooking Cosmopolis, WA, from near the crest of Cosmopolis
Hill, on Highway 101, about 2 miles north of the Hwy 107, "Montesano
Coverage: The "Cosi" Repeater covers the
Aberdeen/Hoquiam area of Grays Harbor County from Ocean Shores on
the west, to Elma on the east. In addition, the coverage follows Highway 101
south to the Pacific County border.
One constraint on this site was the landlord's requirement
that the entire station be mounted to the back wall and not stick
out more than a foot. Doyle, N7UJK, installed and painted a sheet of chip-board
as a foundation, and all components were secured to this. The
Wacom 5-inch BpBr duplexer
stuck out 11-inches, and the rest of the gear was well within our
one-foot allowance. Since we installed the repeater, the tiny shack
filled up with other equipment. We considered ourselves lucky to have this site, and
living within the one-foot space requirement has been a modest concession.
In April and May of 2014, the landlord (Grays Harbor PUD)
required us to move into a new building at the other end of the fenced area.
The previous shack was taken over by a broadcast station, and we were offered
a rack in the newer facility. This was a definite step up, and allowed
replacing the original duplex-converted mobile with a
station chassis, much better suited to repeater service.
During an emergency, this repeater will probably be disconnected
from the network, to provide intra-county communications support.
The link is capable of connecting the Cosi repeater
to the Neilton, Minot or Olympia sites, to enhance
communications within Grays Harbor County. This repeater is directly
accessible from the Grays Harbor EOC in Montesano.
Hardware: The repeater is based on
a 100-watt continuous-duty, GE Mastr-II,
duplex-converted station chassis, running 40-watts output. The controller is a
CAT-200B in a Radio Shack metal box mounted on a standard rack shelf above it.
is provided by a GE Rangr UHF mobile, running 10-watts.
Several fans circulate air across
the repeater heatsink to keep things cool. A Hustler
G6-270 antenna, shared between the repeater and link radio,
is mounted above a microwave dish well up the tower, and
fed with 150-feet of LDF5-50 7/8-inch hardline through a
diplexer. The repeater signal passes through a VHF DCI filter
to attenuate the high level of broadcast RF at this site.
Web Cam: for a look at the road
conditions on Hwy 101, right outside the
gate to the site access road,
Click Here for the WSDOT traffic cam.