442.400

Operational

Offset: + 5.0 MHz

Bandwidth: 25 kHz - Wideband

Springfield

Coverage: Christian, Dallas, Greene, Lawrence, Polk and Webster Counties

Access Information:

ANALOGDPL 165

DSTAR

Attributes:

DSTAR

Technical Specifications

Transmitter

Motorola MTR-2000

Antenna

Comprod 774-70TM

Duplexer

None

Controller

Repeater Builder MTR2K MMDVM

About This Repeater

442.400 Repeater - Springfield, MO (Queen City Digital Cluster D-STAR Repeater)

On-Air Date: November 9, 2023

Repeater Transmit: 442.400

Repeater Receive: 447.400 (+ 5.0 MHz)

Modes: D-Star & Analog

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: Thursdays @ 7:30 p.m. – REF059A – Central Missouri Digital Group D-Star Net

On November 9, 2023, the 442.400 went online as part of the Queen City Digital Cluster! The repeater uses a 100-W 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 442.400 receiver.

View the repeater status at https://442400.nixahams.net/