Dual-Band base antennas


DualBand 146/446MHz

146MHz 3.0dBi
446MHz 6.0dBi
VSWR: 1.5:1 or less
Max Power: 200 watts SSB/100W FM
Length: 4′ 2″
Weight: 2 lbs.
Mounting Mast Dia: 1.25 – 2.5″
Connector: SO-239
Construction:  Heavy-duty fiberglass

Very compact 2M/440 base antenna.

Perfect for outdoors, attic or closet installation

DualBand 146/446MHz

146MHz 4.5dBi
446MHz 7.2dBi
VSWR: 1.5:1 or less
Max Power: 200 watts SSB/100W FM
Length: 5′ 11″
Weight: 2 lbs. 12 oz.
Mounting Mast Dia: 1.25 – 2.50″
Connector: SO-239
Construction: Heavy-duty fiberglass

GP-3 Mt Everest

Trent Carey



The photo is of myself at advanced base camp with a GP-3 on a tripod.


Several years ago, I took a pair of GP-3’s and tripods on a climbing expedition with International Mountain Guides to Mt. Cho Oyu.
Mt. Cho Oyu is the 6th tallest mountain in the world, just 30 miles west of Mt. Everest, our approach was from the North through Tibet.
The GP-3s provide communications between camps and to climbers with handheld 2 meter radios. The equipment is now transported seasonally with the climbing Sherpa between Mt Cho Oyu and Mt. Everest base camps.


Great antenna!


DualBand 146/446MHz


This is the best all-around antenna combining gain and coverage area at reasonable cost for roof top installations


Gain & Wave:
146MHz 6.5dBi 5/8 wave x 2
446MHz 9.0dBi 5/8 wave x 5
VSWR: 1.5:1 or less
Max Power: 200 watts SSB/100W FM
Length: 10′ 2″
Weight: 3 lbs. 8 oz.
Connector: SO-239
Construction: Heavy-duty fiberglass, 2 sections

GP-9 (SO-239 Conn) GP-9N (N-Conn)

Dual-Band 146/446MHz base or repeater antenna

The GP-9 is the highest gain, dual-band fixed station antenna available from COMET.  If you desire the absolute maximum coverage area, this is the antenna to choose.  The radiation pattern is directed to the horizon omni-directionally around the antenna.  However, keep in mind that a high-gain antenna pattern has narrow elevation angle.  In mountainous areas the pattern will not reach valley floors or mountain tops.  If you need to cover areas around the antenna that are a few thousand feet above or below the antenna elevation, the GP-6 may be a better choice due to the wider radiation angle of a lower gain antenna.


Gain & Wave:

146MHz 8.5dBi 5/8 wave x 3
446MHz 11.9dBi 5/8 wave x 8
VSWR: 1.5:1 or less
Max Power: 200 watts SSB/100W FM
Length: 16′ 9″
Weight: 5 lbs. 11 oz.
Mounting to Mast Size:  1.25″ –  2.50″
Connector: SO-239 or Female N-type
Max wind survival: 92MPH
Construction: Heavy-duty fiberglass, 3 sections


Although hundreds are in use in repeater systems, it was not designed for mountain-top installation where extremely high winds, ice and other extreme conditions exist. It performs best in low to mid elevation installations where the high gain radiation pattern is most effective.

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