The Rolla 146.820- Repeater, PL 110.9 Hz, went online on Monday, June 1, 2020.
The site uses an SCOM 7330 Repeater Controller to handle all repeater and link radio audio and control the site cooling fans. A Duracomm DPS-75 with SL-Rack provide power to all equipment other than the repeater.
Linking is done with a Motorola CDM-750 40-Watt link radio with a Commscope DB-436C 10 dBd gain yagi at ~ 200′ AGL directed Southwest toward the Bendavis hub repeater. The link antenna is fed with Commscope AVA6-50 1-1/4″ heliax.
The repeater utilizes a Comprod 872F-70TM antenna with 5.5 dBd gain mounted at 310′ AGL on the South leg and directed South-Southwest at 120-degrees. The antenna is fed with ~ 330′ of Commscope AVA5-50 7/8″ heliax
The repeater is installed in a climate controlled, hardened environment to withstand the worst of conditions. The equipment utilizes a building UPS and a backup power generator on site to ensure the repeater is available when it is needed.
Special thanks to the following for supplying equipment for this repeater helping to make it a reality:
- Jim Colville, W7RY
- Missouri Hospital Association
Numerous amateur radio operators have also made cash donations that helped pay for the installation of the antennas and coax cables on the tower.