The Radioddity DB25-D is a compact and powerful dual-band mobile radio designed for amateur radio enthusiasts who want both analog and digital communication in a single device. Despite its small size, it packs in an impressive set of features that make it a versatile tool for mobile and base station use.
It supports VHF and UHF bands and offers compatibility with both DMR Tier I and Tier II systems. Additionally, the DB25-D includes a built-in GPS and APRS functionality, enabling location tracking and data sharing on the go.
Analog and Digital Modes
This radio operates in both analog and DMR digital modes, additionally, the dual-mode capability allows users to communicate with a wider range of other radio operators. While analog is still widely used, digital operation offers clearer audio, better data transmission, and more efficient spectrum usage. Furthermore, switching between analog and digital is seamless, making it easy to adapt to different operating conditions.
Dual Band VHF/UHF Coverage
The DB25-D supports both the VHF (136–174 MHz) and UHF (400–480 MHz) bands, providing flexibility in communication. Operators can use VHF for long-distance line-of-sight communication in open areas and UHF for better penetration in urban environments. Moreover, it features true dual receive, allowing users to monitor two channels simultaneously.
20-Watt Power Output
With 20 watts of maximum output power, the DB25-D delivers strong and reliable transmission for mobile use. It provides selectable power settings, allowing users to conserve battery and reduce heat when full power isn’t necessary. Additionally, this makes the radio suitable for both short-range and extended-distance communication, depending on the power level chosen.
GPS and APRS Functionality
A standout feature of the DB25-D is its built-in GPS module. It enables automatic position reporting and supports APRS (Automatic Packet Reporting System), which allows users to send real-time location data to other users or mapping systems. Consequently, this feature is especially useful during events, group activities, or emergency communications where location matters.
Large Contact Storage
The radio supports up to 500,000 digital contacts, which is more than sufficient for any amateur radio operator. This capability is particularly beneficial for DMR networks like BrandMeister, where contact lists can grow large. As a result, users can communicate with a vast number of operators worldwide without limitation.
Color Display and User Interface
One of the most visually appealing aspects of the DB25-D is its bright and clear color screen. The display provides real-time information including signal strength, frequency, channel name, GPS coordinates, battery voltage, and menu navigation.
As a result, users find it easier to operate the radio even in low-light environments. Furthermore, the user interface is intuitive, allowing quick access to various settings and features.
Compact Size and Durable Build
Although the DB25-D offers a range of high-end features, it remains compact and easy to install in a vehicle or at a home station. Its small footprint allows it to fit in tight spaces, however, the radio is built with durability in mind. The chassis includes heat dissipation fins and a fan to manage internal temperature effectively during extended transmissions.
Text Messaging (SMS)
The inclusion of SMS capability allows users to send short text messages via DMR. While not a replacement for cell phones, this feature adds another layer of communication, especially useful in areas with limited cell coverage or in emergency operations where silence is necessary.
Additional Features
The DB25-D includes a host of additional features, such as dual time slot support for DMR, programmable function buttons, and a detachable faceplate. It also offers voice prompts, customizable channel names, and the ability to store multiple zone and channel configurations. These features make it easy to tailor the radio to an individual operator’s needs.
Performance and Audio Quality
The DB25-D delivers excellent audio clarity, both on transmit and receive. Its internal speaker provides clear sound, and it includes a standard external speaker jack for improved audio in noisy environments. Moreover, DMR’s digital noise suppression ensures that voices remain crisp and intelligible, even in challenging conditions.
Power Supply and Operation
This radio requires a 13.8V DC power supply and comes with a power cable for mobile installation. It can also be used with a regulated power supply in a base station setup. Importantly, the power draw is efficient, which helps prevent vehicle battery drain during extended operation.
General Specifications
- Model: Radioddity DB25-D
- Frequency Range:
- VHF: 136–174 MHz
- UHF: 400–480 MHz
- Operating Voltage: 13.8V DC ±15%
- Power Output:
- High: 20W
- Mid: 10W
- Low: 5W
- Channel Capacity: 4,000 channels
- Zones: 250 zones (up to 250 channels per zone)
- Contacts: Up to 500,000 digital contacts
- Talk Groups: Up to 10,000
- Frequency Stability: ±0.5 ppm
- Operating Temperature: -20°C to +50°C (-4°F to 122°F)
- Antenna Impedance: 50 Ohms
- Weight: Approx. 900g (2 lbs)
- Dimensions: 5.9 x 4.8 x 1.7 in (150 x 122 x 43 mm)
- Display: Full-color LCD screen
- Audio Output Power: 2W internal speaker
Transmitter
- Modulation:
- Analog: FM (F3E)
- Digital: 4FSK
- Emission Designator:
- Analog: 16K0F3E / 11K0F3E
- Digital: 7K60FXD / 7K60FXE
- Spurious Emission: < -60 dB
- Audio Distortion: ≤3%
- FM Noise: ≥45 dB (Wide) / ≥40 dB (Narrow)
Receiver
- Digital Sensitivity: 0.3μV / BER 1%
- Analog Sensitivity: 0.2μV (12dB SINAD)
- Adjacent Channel Selectivity:
- ≥60 dB (Narrow)
- ≥70 dB (Wide)
- Intermodulation: ≥65 dB
- Spurious Response Rejection: ≥70 dB
- Audio Distortion: ≤3%
Features
- DMR Tier I & II compliant
- True Dual Band and Dual Standby
- GPS Built-in (for APRS and position tracking)
- APRS (TX on DMR and RX/TX on Analog)
- 500,000 digital contact capacity
- Color LCD Display
- SMS Text Messaging via DMR
- Supports Custom Programming via CPS
- Detachable front panel for flexible mounting
- Programmable side buttons
- Supports both digital and analog repeaters
- Includes DTMF keypad microphone
- Voice prompts and voice announcements
- Time slot and Color Code selection
- Scan and Priority Scan
- Squelch, VOX, and Talk Around
What’s Included in the Box
- DB25-D radio unit
- Detachable front panel
- Mounting bracket and hardware
- Hand microphone with DTMF keypad
- Power cable
- USB programming cable
- User manual
These accessories provide everything needed to get started immediately, whether installing in a vehicle or using at home.
Radioddity DB25-D Final Thoughts
The Radioddity DB25-D mini mobile radio stands out as a feature-rich and compact solution for ham radio users who want flexibility, reliability, and digital capability. Its combination of dual-band operation, GPS/APRS, massive contact storage, and clear audio makes it suitable for a wide range of applications.
If you’re a mobile operator, a digital enthusiast, or a beginner entering the world of DMR, the DB25-D delivers performance and value in a small, efficient package.