Nevada 145.450 – Repeater

Nevada 145.450- Repeater

PL 91.5 Hz               Nevada rptr

The 145.450 became a part of the SMLRS system on April 6, 2013.  Realizing the need for radio coverage in the Nevada and surrounding area, repeater owner, and Vernon County Emergency Management Director Dennis Kimrey, W0HL, contacted the SMLRS group about becoming a part of the system.  In order for it to become part of the system, the repeater system was upgraded to meet the SMLRS standards.

A new DB-224E was installed at 208′ AGL and new Andrew AVA5-50 7/8″ virtual air heliax was installed on the tower.  Ground kits were installed at the top and the bottom of the tower to keep lightening out of the shelter.

The repeater is located inside the hardened concrete shelter, with 12″ thick concrete, steel re-enforced walls.  A UPS provides constant, 120vac power to the equipment and will keep the repeater online until the site generator turns on during extended power outages.  The generator is capable of running for several weeks without re-fuel, making the power at the site ultra reliable.

The repeater is a commercial Tait T800 series II 110w continuous duty VHF repeater, and is wired up to the SCOM 7330 controller.  The repeater and controller are powered by a Power Source 50a power supply, which loafs at current levels drawn by the Tait and SCOM equipment.  The Wacom WP-641 4-cavity duplexers were re-tuned and used for the upgraded repeater system and connects the repeater to the antenna system via Andrew FSJ4-50B 1/2″ superflex used to connect the duplexers to the Polyphaser lightening arrestor and ultimately the antenna.

A commercial Motorola CDM-1250 link radio is used to connect the 145.450 repeater into the SMLRS system via the 444.975 “hub” repeater at Stockton Lake.  The 40w radio runs at only 15-Watts and is cooled with forced air to allow for continuous duty operation.  The radio is connected to an Andrew DB-436C yagi at 50’ AGL via Andrew LDF5-50 7/8” heliax, which utilizes ground kits on the coax and a Polyphaser coax lightening arrestor to protect the equipment from lightening damage.

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