MRA-135 20W HF/FM/VHF/UHF Small Loop Antenna for IC-705
MRA-135 20W HF/FM/VHF/UHF Small Loop Antenna for IC-705
MRA-135 20W Small Loop Antenna – Full-Band Portable HF/FM/VHF/UHF
The MRA-135 Small Loop Antenna is a compact, high-efficiency multiband antenna purpose-built for portable QRP operation. Whether you're setting up a field station, monitoring aviation frequencies, or operating from a space-constrained balcony, this 65cm loop delivers impressive performance across Shortwave (HF), FM, VHF aviation, and UHF bands — all from a lightweight, easy-to-mount package. Made in Mainland China.
Key Features
- Full-Band Coverage: Supports HF (Shortwave), FM broadcast, VHF aviation, and UHF two-way radio bands — one antenna for multiple communication needs.
- High-Efficiency Low-SWR Design: Achieves SWR ≤1.2 on popular HF bands (7, 10, 14, 21, 29 MHz), enabling stable operation without requiring a complex external antenna tuner.
- 20W Power Handling (QRP-Ready): Handles up to 20W transmit power, making it an ideal match for low-power HF transceivers like the Icom IC-705 and Yaesu FT-818, as well as other mainstream HF/VHF/UHF portable rigs.
- Compact 65cm Loop Diameter: Ultra-portable form factor fits in a backpack; ideal for field operations, emergency communications, travel, or apartment use.
- Quick 1/4-Inch Thread Mount: The base features a standard 1/4-inch threaded mount — attaches directly to smartphone holders, camera tripods, or light stands with no extra tools needed.
- Standard BNC Female Output: Universal BNC interface connects easily to most handheld and desktop transceivers; a BNC Male to SMA/N-Type adapter is included.
- Factory Tuning Reference Data Included: Pre-provided capacitor reference values help you quickly zero in on the optimal match point, reducing guesswork during setup.
Ideal Use Cases
- Outdoor field communications and portable HF station setups
- HF amateur radio operation in space-constrained environments (apartment balconies, hotel rooms)
- Aviation frequency monitoring and FM broadcast reception
- Backup or temporary vehicle-mounted antenna configurations
Specifications
| Model | MRA-135 |
| Material | ABS |
| Color | White |
| Loop Diameter | 65 cm |
| Max Transmit Power | 20W |
| SWR (HF bands) | ≤1.2 (at 7, 10, 14, 21, 29 MHz) |
| Frequency Coverage | HF / FM / VHF / UHF |
| Output Connector | BNC Female |
| Mount | Standard 1/4-inch threaded base |
| Brand | HpLive |
| Origin | Made in Mainland China |
Package Contents
- MRA-135 Small Loop Antenna Unit × 1
- BNC Male to SMA/N-Type Adapter × 1
Note: Tripod not included. Standard threaded mount is provided at the base.
Important Usage Notes
- Do not exceed 20W input power — overloading may damage the loop's tuning capacitor.
- During tuning, start at low power (under 5W) using an SWR meter; increase power only after achieving the lowest SWR reading.
- Keep the antenna as far from metal obstacles as possible, and orient the loop vertically or horizontally according to your desired polarization mode.
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Frequently Asked Questions
Q: Is the MRA-135 small loop antenna compatible with the Icom IC-705?
A: Yes. The MRA-135 is specifically designed for QRP transceivers like the Icom IC-705 and Yaesu FT-818. Its 20W maximum power rating and low SWR (≤1.2 on common HF bands) make it a seamless match for these radios, and the included BNC adapter ensures easy connection.
Q: Do I need an antenna tuner to use this loop antenna?
A: In most cases, no. The MRA-135's high-efficiency small loop design achieves an SWR of ≤1.2 on popular HF bands (7, 10, 14, 21, 29 MHz) without an external antenna tuner. Factory-provided tuning capacitor reference data further simplifies setup.
Q: Can I mount this antenna on a standard camera tripod?
A: Absolutely. The base of the MRA-135 features a standard 1/4-inch threaded mount, which is compatible with most camera tripods, smartphone holders, and light stands — no additional hardware or tools required.
Q: What bands does the MRA-135 cover?
A: The MRA-135 covers Shortwave (HF), FM broadcast, VHF aviation, and UHF bands, making it suitable for HF amateur radio communication, FM broadcast reception, aviation band monitoring, and UHF two-way radio use.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.