The W6BXN repeater is located on Mt. Bullion just north of the town of Mariposa, its frequency is 147.030 positive with a PL of 100 , it has a full time link on 444.700 positive with a PL of 107.2 and a sometimes link on 10 meters by the control operator. This system also has a full time link into a repeater on Turtle Back Dome in Yosemite National Park on the frequency of 147.000 positive with NO PL, the system also has remote control access, Phone Patch capabilities and battery backup. The W6BXN site also host a 1.2 Gig repeater which is not linked . With this system we serve the Central Valley and Yosemite areas very well. |
The Shack |
The View
2 meter 440 and phone patch Yagi antenns, right are the same antennas with our 6m & 1.2 in background, the 10 meter antenna is on the shack.
Rf could becomd a problem up here.
2 meter and 440 Radios 1.2 Gig Radio
10 meter Radio our 6 meter goes below The Phone Patch
RC 85 controller
Yosemite 147.000 Repeater
The Yosemite Repeater at Turtle Dome is now back on the air. Vaughn K6IMN and Grady
K6IXA made the run to Turtle Dome to replace the repaired unit. The system consists of a
Uhf receiver on 444.700 back to back with a Vhf transmitter on 147.000. The companion unit
consists of a Vhf 147.63 receiver back to back with a Uhf 449.700transmitter. The system actually
is two full duplex links that work into the Uhf 444.700 repeater on Mt Bullion. All control and audio
is therefore routed through Mt Bullion. The end result is a repeater in Yosemite on 147.000 +.
Now that everyone is adequately confused, here are a couple of pictures. Which depict the layout.
Picture on the Bottom right is the Repeater Bay. From top to bottom, Uhf Receiver/Vhf Transmitter. The
blank panel is Uhf Duplexer mounted on back of panel. Next is the Vhf receiver/Uhf transmitter.
On bottom is the Vhf Duplexer. Picture on bottom left is the Vhf Yagi pointing right into Yosemite Valley.
The Uhf Yagi below pointing left towards Mt Bullion.
Yosemite 147.000 Repeater
The VHF engineering equipment used in Yosemite was originally constructed from a kit by Grady, K6IXA approximately
25 years ago. My how time flies. Although relatively trouble free it’s ever increasing minor maintenance issues
prompted it’s replacement. In keeping with the Motorola Radius/ Maxtrac direction, we were able to acquire 4 Radius mobile units to
configure the bi-directional link to the Mt Bullion System which comprises the Yosemite Repeater. The new equipment
should improve performance & reliability
The top shelf is 147.00 TX. and 444.700 rec. Middle is control & Power supply. Bottom shelf is 449.700 TX 147.600 rec.
NEW LOW LEVEL TURLOCK REPEATER
TARC now has a low level 147.03 (pl 103.5) repeater at the War Memorial in Turlock.
The system consists of a repeater, frequency agile vhf/uhf remote base with a uhf link to the Mt. Bullion system.
The Turlock system is configured as a satellite receiver using
a PL of 103.5 linked to Mt. Bullion in the normal mode. During periods of local public service the link to Mt. Bullion is
dropped and the system becomes a stand alone repeater. The remote base can be configured to work with the Local or
Mt. Bullion repeaters providing linking to other repeaters for routine and emergency applications. This was a major project
involving numerous folks. A heartfelt thanks to all of those who worked on the new antenna tower and equipment installation.
Our capability to meet the communication needs of the community is greatly enhanced.
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Revised 03/16/08 Web page by Carl Wheeler
