1. Introduction
Thank you for choosing the GOOZEEZOO Donut SW Mini Loop Antenna. This compact and portable antenna is designed to enhance shortwave reception for compatible receivers such as the HFDY DSP1, DSP2, and Malachite. This manual provides essential information for proper setup, operation, and maintenance to ensure optimal performance.
2. Safety Information
- Keep the antenna away from water and moisture.
- Avoid exposing the antenna to extreme temperatures or direct sunlight for prolonged periods.
- Do not attempt to disassemble or modify the antenna. This may void the warranty and cause damage.
- Ensure proper connection to your receiver to prevent damage to both devices.
3. Package Contents
Please verify that all items are present in your package:
- Donut SW Antenna x 1
4. Setup Instructions
The Donut SW Mini Loop Antenna features a plug-and-play design for quick installation.
- Unpack the Antenna: Carefully remove the Donut SW Mini Loop Antenna from its packaging.
- Connect to Receiver: Locate the antenna input port on your HFDY DSP1, DSP2, Malachite, or other compatible shortwave receiver. Connect the SMA connector of the Donut SW Antenna to this port. Ensure the connection is secure.


Important Note:
This antenna is a narrow-band resonant antenna. It must be used in conjunction with a receiver that has a high impedance input port, such as the Malachite receiver. Failure to do so may cause antenna detuning and result in poor reception.
5. Operating Instructions
Once connected, the Donut SW Mini Loop Antenna is ready for operation. Its frequency range covers 4MHz-24MHz.
- Power On Receiver: Turn on your shortwave receiver.
- Select Frequency: Tune your receiver to the desired shortwave frequency within the 4MHz-24MHz range.
- Tune the Antenna: Slowly rotate the tuning knob on the Donut SW Antenna. You will observe a peak in signal strength or a reduction in noise as you approach the resonant frequency for your selected band. Adjust for the clearest reception.

Video 5.1: This video illustrates how to adjust the tuning knob on the Donut SW Mini Loop Antenna to optimize reception on a shortwave radio receiver.
6. Maintenance
The Donut SW Mini Loop Antenna requires minimal maintenance.
- Cleaning: Use a soft, dry cloth to wipe the antenna clean. Do not use abrasive cleaners or solvents.
- Storage: When not in use, store the antenna in a cool, dry place away from direct sunlight and extreme temperatures.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Poor or no reception | Antenna not properly tuned. | Rotate the tuning knob on the antenna to match the receiver's frequency. |
| Antenna not connected securely. | Ensure the SMA connector is firmly attached to the receiver. | |
| Receiver input impedance mismatch. | Ensure your receiver has a high impedance input port, as this antenna is designed for such compatibility (e.g., Malachite receiver). | |
| Interference from nearby electronic devices. | Move the antenna and receiver away from computers, power supplies, or other sources of electronic noise. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | Donut SW Antenna |
| Brand | GOOZEEZOO |
| Antenna Type | Mini Loop Antenna (Shortwave) |
| Frequency Range | 4MHz-24MHz |
| Impedance | 4 Ohms |
| Number of Channels | 1 |
| Color | Black or White (variant dependent) |
| Compatibility | HFDY DSP1, DSP2, Malachite Receivers (requires high impedance input) |
9. Warranty and Support
Warranty: This GOOZEEZOO product comes with a 1-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized modification, or improper installation.
Customer Support: For technical assistance, troubleshooting, or warranty claims, please contact GOOZEEZOO customer support through the retailer where you purchased the product or visit the official GOOZEEZOO website for contact information.
