MSI04 UHF CB Repeater – Channel 4
Overview
The MSI04 UHF CB repeater is located in the Adelaide Hills, South Australia, and operates on Channel 4. It has been established primarily to provide reliable communications for residents, particularly during the bushfire season when dependable local communication is essential.
MSI04 serves as a community-focused repeater, supporting both everyday use and emergency situations.
Location & Coverage
Positioned at the top of Mount Misery at approximately 536 metres above sea level, MSI04 delivers excellent wide-area coverage.
Coverage Areas Include:
- Barossa Valley
- Adelaide Hills
- Metropolitan Adelaide
- Nairne and surrounding regions
- Parts of the Murray River areas
This elevated location allows the repeater to provide strong and consistent signal performance across a large geographic footprint.
Technical Information
- Callsign: MSI04
- Channel: UHF CB Channel 4
- Mode: Narrowband
Antenna System
The repeater uses a dual folded dipole antenna configuration:
- A receive antenna mounted at the top of the tower
- A transmit antenna positioned lower on the structure
This separation helps optimise signal clarity and performance.
Purpose
The primary purpose of the MSI04 repeater is to:
- Provide reliable communication during bushfire season
- Support local residents and travellers
- Enhance safety and coordination during emergencies
- Offer general-purpose UHF CB coverage for the region
Community Support
MSI04 is maintained as a community service. Ongoing operation, maintenance, and improvements rely on voluntary support.
Donations
All donations go 100% toward:
- Equipment maintenance
- Power and infrastructure costs
- System upgrades and improvements
Your support helps ensure the repeater remains operational and reliable when it is needed most.
Future Updates
Additional information, including detailed coverage maps and technical insights, will be published soon.
Stay tuned for updates.

Help with Maintenance and Running costs – All donations go 100% to the CB Repeaters.