Crane 442.150+ Repeater

Motorola MSF-5000 442.150

Crane 442.150+ Repeater  PL 162.2 Hz           

 The 442.150 repeater went on-the-air on July 3, 2012, and was the first repeater online for the SMLRS repeater system.   The repeater acts as the primary “hub” repeater for the system, linking all Region D SMLRS repeaters together.

The repeater is located 200’ AGL on a City of Crane water tower.  The Andrew DB-420 is a 9.2 dBd gain antenna, and is fed with Andrew LDF5-50 7/8” heliax.  The DC grounded antennaand ground kits mounted at the top and bottom of the coax help protect the vital piece of the SMLRS linked repeater system.

The repeater is located in a hardened shelter and in case of power failure, the building UPS battery backup will hold the repeater on the air until the site generator becomes active.  The site generator is capable of running the site continuously for over 2 weeks!

Inside the building, the Polyphaser coax arrestor protects this vital system repeater.  The TX RX 28-66-02A duplexers connect the repeater to the antenna system.  The repeater itself is a rugged commercial Motorola MSF-5000 workhorse.  The 110-W continuous duty amplifier runs at 90-W output to ensure reliable operation for a long period of time.  The repeater was strategically located in the building in front of the air conditioner vents to help maximize system cooling.  The site is controlled by an SCOM 7330 repeater controller.

Also located on site is a commercial Motorola XPR-6550 UHF Link Radio used to connect the SMLRS to the Southwest Missouri Brandmeister talkgroup 31291.  The link radio runs at 20-W output, less than ½ of the rated output to help.  It is connected to a heavy duty Andrew DB436 yagi, mounted at 150’ AGL and fed with Andrew LDF5-50 7/8” heliax.  The yagi is also protected with a Polyphaser lightening arrestor, and coax cable grounding kits.  In case of a total system failure, the 442.425 Clever repeater acts as a hot, off-site standby to maintain linked system operations.

The Crane repeater also serves as the access point for the SMLRS IRLP node #7191 and the EchoLink node 113667, Callsign K0NXA/R. The node is an EchoIRLP node utilizing a Raspberry Pi3 computer with an IRLP interface board.

The EchoLink node is only allowed for use by amateur operators who request and are granted access to the node. If you would like access to the node, email officials@nixahams.net to request use of the EchoLink node. Simplex and Repeater connections will not be allowed unless exigent circumstances dictate a need that will enhance system coverage for temporary use during a disaster or public service event.

Back of 442.150 Repeater in Crane
%d bloggers like this: