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Comet GP-9M High-Gain Dual-Band Base Antenna Model GP-9 for 144/446 MHz—Premium Outdoor Fiberglass Vertical Antenna with Exceptional Range and Low-Loss Performance for Ham Radio Operators

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Availability: In Stock.
Fulfilled by Hamcity com

Arrives Sunday, Mar 29
Order within 7 hours and 25 minutes
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Features

  • High-Gain Dual-Band Performance: Designed for serious ham operators, the Comet GP-9M delivers exceptional gain on both 144 MHz and 446 MHz, providing extended communication range and strong, reliable signals in demanding environments.
  • Heavy-Duty Outdoor Construction: Built with rugged fiberglass materials, this antenna withstands harsh weather conditions including wind, rain, and UV exposure, ensuring long-lasting performance for permanent home or base-station installations.
  • Outstanding Signal Efficiency: Engineered with precision components and low-loss design, the GP-9M maximizes RF efficiency, reduces noise, and improves clarity, making it ideal for long-distance repeater access and simplex communication.
  • Easy Mast or Tower Installation: Features a straightforward mounting system compatible with standard masts and towers, allowing quick setup with secure hardware and stable performance even in elevated install positions.
  • Trusted Comet Engineering: Manufactured by Comet, a leader in communication antennas, the GP-9M offers professional-grade reliability, excellent durability, and industry-proven performance trusted by amateurs worldwide.

Description

The Comet GP-9M is a high-performance dual-band base antenna designed for ham operators seeking maximum range, reliability, and signal clarity on the 144 MHz and 446 MHz amateur bands. Built with heavy-duty fiberglass materials, this antenna is engineered for long-term outdoor operation and maintains stable performance in wind, rain, heat, and cold. Its exceptional gain characteristics allow operators to dramatically extend their communication footprint, whether working through distant repeaters or conducting long-range simplex contacts. With a precision low-loss internal design, the GP-9M delivers efficient signal transfer from transmitter to antenna, reducing noise and improving overall communication quality. Whether installed at a home QTH, on a tower, or mounted on a high mast, the antenna integrates easily with most standard mounting hardware and remains secure once in place. Its rugged construction and professional engineering make it an ideal choice for operators who demand dependable performance and strong RF coverage. Trusted worldwide, the Comet GP-9M is a powerful upgrade for any serious amateur radio station looking to improve range, reliability, and daily operating performance.

Antenna: Mobile, portable, or base station


Brand: Comet


Color: White


Impedance: 50 Ohms


Maximum Range: 264 Feet


UPC:


Manufacturer: Comet


Global Trade Identification Number: 19


Number of Items: 1


Product Dimensions: 67 x 4 x 4 inches


Item Weight: 4.84 pounds


Item model number: GP-9


Is Discontinued By Manufacturer: No


Other display features: Wireless


Color: White


Manufacturer: Comet


Date First Available: August 11, 2010


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Mar 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great product
Great product for the price
Reviewed in the United States on January 23, 2024 by Sara Jeffcoat

  • This is the one to get
After buying probably 15 of this type of antenna from ALL of the manufacturers in the last 40 years, they finally have worked out all the bugs in this model. Normally I had to tap extra set screws, add non-ox compound and solder all the element connections together. Not in this baby. This is the top performer and built to last. Yeah, it is expensive, but totally worth it. just pair it up with some LMR-400 and you are golden. ... show more
Reviewed in the United States on December 26, 2024 by Robert J. Nagy

  • Full quieting
I am happy with this antenna. Conversations with nets report that I am full quieting into the repeater.
Reviewed in the United States on January 19, 2026 by Tom Newsom

  • Comet GP9-m , worth the price & weighs only 5 pounds!
17 ft. antenna with 1.2 SWR in my location. Amazingly easy to set up & handles 200 watts. Its amazing it came in the thin plastic package from factory and was handled perfectly/carefully by all delivery people. since U.S.P.S. has had issues with damage here i was worried. But, it was delivered perfect! ... show more
Reviewed in the United States on October 15, 2025 by Gave it a Go

  • Defective antenna
Antenna was defective and had to return it
Reviewed in the United States on January 10, 2021 by Sean M.

  • Check all parts. The elements slide out
Great antenna. Was highly recommended. 4 stars because there were no set screws in coupler to tighten elements or instructions but I'd downloaded them after placing order. To lowes i go
Reviewed in the United States on March 29, 2025 by Patrick Underwood

  • Love this antenna!
I could hit a repeater that I couldn't hit before. Definitely extended my range!
Reviewed in the United States on August 3, 2023 by jflqm jflqm

  • Assembled in minutes, mounted mid-way up a 60' tower ...
Assembled in minutes, mounted mid-way up a 60' tower, (Comet CHA-250B on top) initial SWR of <1.3, repeaters at 46 miles confirmed opened, using a (Yaesu) FT-991A (multi band radio HF/VHF/UHF with dual antenna inputs) and throttled to 50W. SWR with and without tuner are very acceptable, would buy again. ... show more
Reviewed in the United States on April 27, 2017 by RDEBOIS

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