1. Introduction
The Retevis RA79 is a versatile dual-band ham radio designed for reliable two-way communication. It offers a wide range of features including NOAA weather alerts, FM radio reception, and emergency alarm functions, making it suitable for various outdoor activities and emergency preparedness. This manual provides detailed instructions for setting up, operating, maintaining, and troubleshooting your RA79 radio.
Figure 1: Retevis RA79 Ham Radio with its charging base.
2. What's in the Box
Please check the contents of your package to ensure all items are present:
- 1x RA79 Radio Body & Antenna
- 1x Battery (1400mAh Lithium Ion)
- 1x Belt Clip & Sling
- 1x USB Desktop Charger
- 1x USB-C Charging Cable
- 1x User Manual
Figure 2: All components included in the Retevis RA79 package.
3. Key Features
- Emergency Radio: The RA79 can receive emergency information during natural disasters or accidents. It quickly scans emergency channels to keep you informed and connected.
- Dual Band Ham Radio: An upgrade for the 5R 3rd series, featuring 200 channels for secure calls, a large LCD display, dual-band display, and high/low power modes.
- NOAA and FM Reception: Capable of receiving NOAA weather alerts and FM broadcast radio.
- Chirp Support & VFO Function: Users can manually set frequencies via the keypad or use PC software (Chirp) for channel programming and settings.
- Triple Band Reception: The RA79 walkie-talkie can receive 2m and 70cm band information, expanding communication range and flexibility. It also includes AM aviation reception for aviation enthusiasts.
- USB-C Charging: Offers convenient USB-C charging and a charging base for flexible power options outdoors or at home.
- 1400mAh Battery: A large capacity battery ensures extended use, ideal for camping or hiking.
4. Setup
4.1. Battery Installation
- Align the battery pack with the grooves on the back of the radio.
- Slide the battery pack upwards until it clicks into place.
- To remove, press the battery release latch and slide the battery downwards.
4.2. Antenna Attachment
- Screw the antenna clockwise into the connector on top of the radio until it is firmly seated.
- Do not overtighten.
4.3. Initial Charging
Before first use, fully charge the battery. The RA79 offers two charging methods:
- USB Desktop Charger: Place the radio (with battery installed) into the desktop charger. Connect the USB cable to the charger and a compatible USB power source.
- Direct USB-C Charging: Plug a USB-C cable directly into the USB-C port on the side of the radio.
Figure 3: USB-C charging options for the RA79.
Figure 4: The 1400mAh Lithium Ion battery provides extended usage.
5. Operating Instructions
5.1. Power On/Off and Volume Control
- To power on, rotate the top-right knob clockwise until you hear a click.
- Continue rotating to adjust the volume.
- To power off, rotate the knob counter-clockwise until it clicks.
5.2. Frequency Tuning (VFO Mode)
The VFO (Variable Frequency Oscillator) mode allows you to manually input and tune to specific frequencies.
- Press the VFO/MR button to switch to VFO mode.
- Use the keypad to enter the desired frequency.
- Use the Up/Down arrow keys to fine-tune the frequency.
Figure 5: Manually editing frequencies using the VFO function.
5.3. Channel Programming (Chirp Support)
The RA79 supports programming via PC software like Chirp. This allows for easy management of channels and advanced settings.
- Connect the radio to your computer using the provided programming cable.
- Install the necessary drivers and Chirp software (refer to the official Chirp website for downloads and instructions).
- Follow the software's instructions to read/write radio data and customize channels.
Video 1: Demonstration of flashing firmware with a browser, relevant for Chirp programming.
5.4. NOAA Weather Alert
The RA79 can receive NOAA weather alerts to keep you informed of severe weather conditions.
- Access NOAA channels by pressing the NOAA button (usually F+5 or a dedicated button).
- The radio will scan for active NOAA broadcasts.
Figure 6: NOAA Weather Alert feature on the RA79.
Video 2: Demonstration of the RA79's emergency alarm function.
5.5. FM Radio Function
The RA79 includes an FM broadcast radio for entertainment.
- Press the FM button (usually F+0 or a dedicated button) to enter FM radio mode.
- Use the Up/Down arrow keys to scan for FM stations.
Video 3: Demonstration of the RA79's FM radio function.
5.6. Wireless Frequency Pairing
The RA79 supports wireless frequency pairing, allowing for quick and easy setup with other compatible radios without a computer.
- Refer to the user manual for specific key combinations to activate wireless copy or one-key pairing functions.
- Ensure both radios are in close proximity and follow the on-screen prompts.
Figure 7: Wireless frequency pairing for fast communication.
Video 4: Demonstration of the RA79's wireless copy function for dual-band radios.
Video 5: Demonstration of the RA79's one-key pairing function.
5.7. 10 Meter Ham Radio Band Operation
The RA79 is capable of operating on the 10-meter ham radio band, expanding its utility for amateur radio enthusiasts.
- Ensure you have the necessary licenses and knowledge for operating on amateur radio bands.
- Tune to the desired frequencies within the 10-meter band (28.000 MHz to 29.700 MHz).
Video 6: Demonstration of the RA79 operating on the 10-meter SSB band.
Video 7: Further demonstration of the RA79's 10-meter ham radio band capabilities.
6. Maintenance
- Cleaning: Use a soft, damp cloth to clean the radio's exterior. Do not use harsh chemicals or solvents.
- Battery Care: To prolong battery life, avoid overcharging or completely draining the battery. Store the radio and battery in a cool, dry place when not in use.
- Storage: If storing the radio for an extended period, remove the battery.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on | Low or dead battery; Incorrect battery installation | Charge the battery; Reinstall the battery correctly |
| No reception or poor audio | Incorrect frequency/channel; Antenna not properly attached; Out of range | Verify frequency/channel; Reattach antenna; Move closer to transmitting radio |
| Cannot transmit | Low battery; Incorrect frequency/channel; TX disabled | Charge battery; Verify frequency/channel; Check radio settings for TX enable |
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | RA79 |
| Item Weight | 7.9 ounces |
| Product Dimensions | 1.48 x 2.36 x 4.53 inches |
| Batteries | 1 Lithium Ion battery (included) |
| Number of Channels | 200 |
| Frequency Range | Dual Band (2m and 70cm, plus AM aviation reception) |
| Talking Range Maximum | 5 Mile |
| Voltage | 7.4 Volts (DC) |
| Water Resistance Level | Not Water Resistant |
| Country of Origin | China |
9. Warranty and Support
Retevis provides a 2-year warranty for the radio body and a 1-year warranty for accessories. A 30-day no-reason return policy is also available. Beyond the warranty period, maintenance services are offered, with buyers responsible for associated costs. For support, please contact Retevis directly on Amazon, and they will respond within 12 hours.
