443.400
OperationalOffset: +5.0 MHz
Bandwidth: 12.5 kHz - Narrowband
Springfield
Coverage: Christian, Dallas, Greene, Lawrence, Polk and Webster Counties
Technical Specifications
Transmitter
Motorola MTR-2000
Antenna
Comprod 774-70TM
Duplexer
None
Controller
Repeater Builder MTR2K MMDVM
About This Repeater
443.400 Repeater - Springfield, MO (Queen City Digital Cluster DMR Repeater)
On-Air Date: May 9, 2017
Repeater Transmit: 443.400
Repeater Receive: 448.400 (+ 5.0 MHz)
Modes: DMR
Color Code: 5
Color Code Direction: Encode & Decode
Analog Access: DPL 165
Transmit Power: 40-Watts
Antenna System: RX: Comprod 774-70TM mounted at 380’ AGL
TX: Comprod 774-70 TM mounted at 360’ AGL
Link antennas: None
Coax Cable: Commscope LDF7-50 1-5/8” cable on both antennas
Controller: None
Repeater Motorola MTR-2000 with MMDVM Board
Combiner: Celwave TJD460-5T – 5-port combiner
Multi-coupler: Celwave
Link Radios: N/A
Backup power: UPS and Generator
Router: Ubiquiti Edgerouter X
Internet: Yes - Springnet
Nets: Wednesdays @ 7:00 p.m. - Ozarks All Digital Net - TG31291
Wednesday @ 7:30 p.m. - Missouri Statewide DMR Net - TG3129
With interest in DMR after a club presentation by Chuck Kraly, K0XM, in January 2017, the club decided to install a DMR repeater at Cox Hospital when the 442.425 repeater was moved to its new home on the Christian County 911 tower in Clever. The repeater utilized the DB408 repeater antenna that was abandoned when the 442.425 was moved to Clever
On November 9, 2023, the 443.400 went online at it’s new location and as part of the Queen City Digital Cluster! The 55-W Motorola SLR-5700 was exchanged for a Motorola MTR-2000 set to 80-Watts fed into a 5-port transmit combiner with ~ 3 dBd of loss for a total of ~ 40-Watts output power to the Comprod TX antenna at 360’ AGL. An 8-Port receive multicoupler with bandpass filter connects the receive antenna at 380’ AGL to the 443.400 receiver.
View the repeater status at https://443400.nixahams.net/