Introduction
The Retevis RT90 is a full-power dual-band mobile transceiver designed for amateur radio operators who want an affordable entry into DMR (Digital Mobile Radio) without sacrificing output power or functionality. With built-in GPS, dual-mode operation, and a robust feature set, it aims to bridge the gap between budget radios and higher-end commercial-grade units.
This review takes a deep dive into performance, features, usability, and real-world value.
Build Quality and Design
The RT90 is built like a traditional mobile rig, with a solid metal chassis that feels durable enough for mobile installations in vehicles or as a base station. The detachable control head is one of its most practical design features, allowing flexible mounting options in tight vehicle interiors.
The color display is bright and easy to read, showing detailed information such as channel, talkgroup, signal strength, and GPS data. The included microphone is straightforward and functional, with programmable buttons that add convenience during operation.
Overall, the design prioritizes practicality over aesthetics, but it is rugged and dependable.
Power and Performance
One of the standout features of the RT90 is its high power output:
- Up to 50 watts on VHF
- Up to 45 watts on UHF
This level of output makes it well-suited for mobile operation, long-distance repeater access, and rural communication where extra power can make a noticeable difference.
In analog mode, audio is strong and clear with good modulation. In digital mode, audio is typical of DMR radios—clean and intelligible, though slightly robotic in tone due to the nature of digital voice encoding.
Receiver performance is solid for its class, providing reliable sensitivity and selectivity for most amateur applications.
DMR Capabilities
The RT90 supports DMR Tier I and Tier II, making it compatible with most amateur DMR networks.
Key DMR features include:
- Dual time slot operation (TDMA)
- Private, group, and all-call functionality
- Large channel and contact capacity
- Text messaging capability
- Basic encryption support (where permitted)
Dual time slot operation allows two simultaneous conversations on a single frequency, which is a major advantage when using repeaters.
This radio is well-equipped for both local and wide-area DMR communication.
GPS Functionality
The built-in GPS adds a valuable layer of functionality, particularly for:
- Emergency communications
- Group coordination during events
- Location tracking via DMR-compatible systems
Operators can transmit their position data, which can be useful in organized activities, public service events, or off-grid operations.
While it doesn’t replace dedicated APRS systems, it provides a useful level of situational awareness.
Features and Functionality
The RT90 is packed with features that make it highly versatile:
- Dual-band coverage (VHF and UHF)
- Dual standby and dual display
- Extensive channel and zone organization
- Analog and digital compatibility
- CTCSS/DCS support for analog operation
- Scanning and priority scan
- Emergency alarm and safety features
- VOX (voice-activated transmit)
- Firmware upgrade capability
These features make it suitable for a wide range of use cases, from casual operation to more demanding communication setups.
Programming and Software
Programming the RT90 is done through PC software, which is typical for DMR radios. However, this is one of the weaker aspects of the unit.
The software interface can feel outdated and somewhat difficult to navigate, especially for those new to DMR. Creating and managing codeplugs requires time and a basic understanding of how DMR systems are structured.
Once properly configured, the radio performs reliably, but beginners should expect a learning curve.
Real-World Usability
In practical use, the RT90 performs well in a variety of scenarios:
- Mobile installations for daily driving or travel
- Base station setups with an external power supply
- Accessing DMR repeaters and networks
- Emergency preparedness and field communications
The ability to switch between analog and digital modes makes it especially useful for operators who use both traditional repeaters and newer digital systems.
Pros and Cons
Pros
- High transmit power for extended range
- Dual-band and dual-mode operation
- Built-in GPS for added functionality
- Large memory capacity for channels and contacts
- Strong overall value for the price
Cons
- Programming software can be difficult for beginners
- Digital audio quality is average
- Not as refined as premium commercial radios
- Initial setup can be time-consuming
Value for Money
The RT90 offers a strong balance of performance and features at a price point that is accessible to many amateur radio operators. It delivers capabilities typically found in more expensive radios, making it an appealing choice for those looking to expand into DMR.
Final Verdict
The Retevis RT90 is a powerful and feature-rich mobile DMR radio that delivers solid performance for its price. While it has some drawbacks—particularly in software usability—it makes up for them with strong output power, flexibility, and a wide range of features.
It is best suited for intermediate and experienced users, but beginners who are willing to learn DMR will find it a capable and rewarding radio.
Overall, the RT90 is a dependable choice for anyone looking to step into the world of mobile digital radio without breaking the bank.\
