1. Introduction
Thank you for purchasing the Degen DE390 Portable Multi-Band Radio. This radio features DSP technology for high sensitivity reception across FM, Medium Wave (MW), and Short Wave (SW1-2) bands. It also includes an energy-saving emergency lighting function, making it ideal for both daily listening and emergency situations. Please read this manual carefully to ensure proper use and maintenance of your device.
Figure 1: Degen DE390 Portable Multi-Band Radio
2. Controls and Features
Familiarize yourself with the various controls and features of your DE390 radio:
Figure 2: DE390 Controls Diagram
- Headphone Jack: For private listening with 3.5mm headphones.
- Lighting: Integrated LED light for emergency illumination.
- Power Jack: For connecting an external 6V DC power adapter (300mA).
- Horn (Speaker): Outputs audio.
- Battery Compartment (Rear): Houses three D-size batteries.
- Light Switch: Toggles the emergency light ON/OFF.
- Volume/Power Switch Knob: Rotates to adjust volume and push/pull to turn the radio ON/OFF.
- Band Selector Switch: Slides to select between FM, MW, SW1, and SW2 bands.
- Indicator Window: Displays the selected frequency band and tuning scale.
- Tuning Selection Knob: Rotates to tune into radio stations.
- Tuning Indicators: LED light that illuminates when a strong signal is received.
3. Setup
3.1 Powering the Radio
The DE390 radio can be powered by batteries or an external power adapter.
3.1.1 Battery Installation
- Locate the battery compartment (5) on the rear of the radio.
- Open the battery compartment cover.
- Insert three (3) D-size (also referred to as "1 battery" in some regions) batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery compartment cover securely.
3.1.2 External Power Connection
- Obtain a compatible 6V DC, 300mA power adapter (not included with all versions).
- Insert the adapter's plug into the Power Jack (3) on the side of the radio.
- Plug the adapter into a standard wall outlet.
Note: If using an external power adapter, batteries are not required for operation but can remain installed as a backup. Ensure the adapter specifications match the radio's requirements (6V DC, 300mA).
Figure 3: DE390 Rear View with Power Information
3.2 Antenna Extension
For optimal reception, especially on FM and Short Wave bands, fully extend the telescopic rod antenna located on the top of the radio. For MW reception, the internal ferrite bar antenna is used, and antenna orientation may improve signal.
4. Operating Instructions
4.1 Power On/Off and Volume Adjustment
- To turn the radio ON, pull the Volume/Power Switch Knob (7) outwards.
- Rotate the Volume/Power Switch Knob (7) to adjust the listening volume.
- To turn the radio OFF, push the Volume/Power Switch Knob (7) inwards.
4.2 Band Selection
Slide the Band Selector Switch (8) to choose your desired frequency band:
- FM: Frequency Modulation (76-108 MHz)
- MW: Medium Wave (525-1710 KHz)
- SW1: Short Wave 1 (3.2-9.5 MHz)
- SW2: Short Wave 2 (9.5-18.0 MHz)
4.3 Tuning to a Station
- Select the desired band using the Band Selector Switch (8).
- Slowly rotate the Tuning Selection Knob (10) to scan for stations.
- Observe the Indicator Window (9) for the frequency display.
- The Tuning Indicator LED (11) will illuminate when a strong signal is detected, indicating a tuned station.
4.4 Using the Flashlight
To activate the emergency light:
- Slide the Light Switch (6) to the "ON" position. The Lighting LED (2) will turn on.
- Slide the Light Switch (6) to the "OFF" position to turn off the light.
4.5 Using Headphones
For private listening, plug 3.5mm stereo headphones into the Headphone Jack (1). The internal speaker will automatically mute.
Video: Demonstration of Degen DE390 radio operation, including tuning, volume, and flashlight function.
5. Specifications
| Feature | Specification |
|---|---|
| Model | DE390 |
| Dimensions (L x H x W) | 195 x 150 x 56 mm |
| FM Frequency Range | 76 - 108 MHz |
| MW Frequency Range | 525 - 1710 KHz |
| SW1 Frequency Range | 3.2 - 9.5 MHz |
| SW2 Frequency Range | 9.5 - 18.0 MHz |
| Power Input | DC 6V, 300mA |
| Battery Type | 3 x D-size batteries (4.5V) |
| Antenna | Telescopic rod antenna (FM/SW), Internal ferrite bar antenna (MW) |
| Speaker | High-quality external magnetic speaker |
| Special Features | DSP technology, Emergency lighting, High sensitivity, Portable design |
6. Maintenance
- Cleaning: Wipe the radio with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Battery Care: If the radio will not be used for an extended period, remove the batteries to prevent leakage and damage.
- Storage: Store the radio in a cool, dry place away from direct sunlight and extreme temperatures.
- Water Exposure: This radio is not waterproof. Avoid exposure to water or high humidity.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or very low volume. |
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| Poor or no reception. |
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| Flashlight not working. |
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8. User Tips
- Battery Type: The radio requires three D-size batteries. Ensure you have these on hand for portable use. The "Power Edition" mentioned in some product listings may refer to a bundle that includes these batteries or a power adapter.
- Optimal Reception: For FM and Shortwave, always extend the telescopic antenna fully. For Medium Wave, try rotating the radio itself to find the best signal, as it uses an internal antenna.
- Emergency Preparedness: Keep fresh batteries in the radio or a compatible power adapter readily available, especially if relying on the emergency lighting function.
- Campus Radio: The FM band (76-108MHz) is designed to cover campus broadcasting frequencies, making it suitable for students or those interested in local university stations.
9. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase.
