BTECH compatible accessory
Nagoya NMO-HDG Heavy Duty GMRS Tuned Amateur Base / Bull-Bar Antenna
$149.89
Nagoya NMO-HDG Heavy Duty GMRS (462/467 MHz) Antenna – NMO and UHF (SO-239) Mounts, 6.6dB Gain, 47.2 Inches, 200W Support – Mobile and Base Station Installations (Mounting Brackets Included)
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Product Description

Nagoya NMO-HDG Heavy Duty Antenna
The Ultimate Solution for GMRS: Off-Road and Base Station Installations
Experience unparalleled performance and reliability with the Nagoya NMO-HDG Heavy Duty Antenna. Engineered for those who demand the best in both mobile and fixed installations, this versatile antenna delivers exceptional signal strength and durability. Whether you’re navigating challenging terrains with a bull bar mount or setting up a robust base station, the NMO-HDG is designed to meet your communication needs with precision and ease.
Built-In Counterpoise for Ultimate Flexibility

No Ground Plane Required
Built-In Counterpoise for Ultimate Flexibility
Say goodbye to installation limitations with the Nagoya NMO-HDG Heavy Duty Antenna, featuring a built-in counterpoise that eliminates the need for a ground plane. This innovative design allows you to mount your antenna virtually anywhere—on a vehicle, mast, or any fixed structure—without compromising performance.
NMO or Direct Cable Connection – Your Choice

Versatile Mounting Options
NMO or Direct Cable Connection – Your Choice
Experience unmatched flexibility with the Nagoya NMO-HDG Heavy Duty Antenna, designed for seamless integration into any setup. Whether you’re using an NMO mount like the Nagoya RB-100N or connecting directly to any PL-259 cable, this antenna adapts effortlessly to your needs.

Bull Bar Vehicle Installations

Withstand 135 MPH Winds

Base Stations and Repeaters

Precisely Tuned for GMRS
| Frequency Range | Tuned specifically for GMRS (General Mobile Radio Service) frequencies. |
| Gain | 6.6 dB |
| Length | 47.2 inches (approximately 120 cm) |
| Power Handling | Supports up to 200W |
| Wind Rating | 135 MPH |
| Mount Type | NMO mount compatible (Nagoya RB-100N recommended), includes NMO to UHF (SO-239) adaptor for PL-259 cable connections. |
| Included Accessories | Mounting brackets, NMO to UHF (SO-239) adaptor. |
| Impedance | 50 ohms |
Product details & support
About this item
- Heavy-Duty Performance: Engineered with a 6.6dB gain and 47.2 inches length, this antenna is optimized for superior signal strength and extended range, making it ideal for base stations, mobile radios, repeaters, and off-road applications.
- No Ground Plane Required: Features a built-in counterpoise, eliminating the need for a ground plane and offering greater flexibility in mounting locations, whether on a vehicle or at a fixed site.
- Dual Mounting Flexibility: Designed to offer maximum versatility, this antenna comes with both NMO mounting and UHF (SO-239) connector options, allowing you to easily switch between setups without needing additional adapters.
- Built to Last: Designed to withstand extreme conditions, the antenna supports up to 200W of power and is wind-rated for 135 MPH, ensuring reliability whether you’re off-roading or operating a base station.
- Comprehensive Installation Kit: Equipped with durable mounting brackets and an NMO to UHF (SO-239) adaptor, this kit enables seamless and secure connections to PL-259 cables. Ideal for a wide range of applications, it’s perfect for everything from vehicle NMO installations (recommended with the Nagoya RB-100N Mount) to fixed mast setups for base stations. This all-in-one solution ensures you have everything necessary for a reliable and adaptable installation, no matter your setup.
- BTECH is proud to be in the USA, which allows you to have the best available local support for any issue that may arise. BTECH only engineers and develops radio products. That brand focus allows you to have the best available radios and accessories with the most features, with real USA warranty and support.
Product Information
| Package Dimensions | 50 x 1.5 x 1 inches |
|---|---|
| Item Weight | 1.06 pounds |
| Manufacturer | BTECH |
| ASIN | Nagoya NMO-HDG |
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North Idaho Tom Jones –
Today I received five Nagoya NMO-HDG antennas I am planning to use for some GMRS repeaters.
I tested all five Nagoya NMO-HDG antennas on my NanoVNA. I wanted to check and verify the SWR was correct for GMRS use. Here are my findings :
– Three of the five antennas checked had good SWR readings at GMRS frequencies 1:1.8 up to 1:2.1
– Two of the five antennas had really bad SWR readings at GMRS frequencies 1:14 and the other was 1:17 ( off enough to create serious problems with my Baofeng radios )
Question , Can these antennas be taken apart ? I am guessing they are a simple J-Pole antenna inside of the PVC pipe. If so , I would like to see and possibly fix the issue verses sending them back.