Comet GP‑3 Dual‑Band High‑Gain Co‑Linear Antenna with Pole and Radials on White Background
Comet GP‑3 Dual‑Band High‑Gain Co‑Linear Antenna with Pole and Radials on White Background
“Comet GP‑3 dual‑band VHF UHF base antenna – full length view”
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Comet GP‑3 Dual‑Band High‑Gain Co‑Linear Antenna with Pole and Radials on White Background
“Comet GP‑3 dual‑band VHF UHF base antenna – full length view”

Comet radio products

Comet GP-3M Dual-Band High-Gain Co-Linear Antenna (146/446 MHz)

£69.95
(£58.29 exc. VAT)
£79.99
(£66.66 exc. VAT) + £10.00
Please note that there is an extra charge for deliveries exceeding 1.0 meter.
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Product code: COMET GP3
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£79.99
12 Months 14.9% APR
£8.00
£6.89
£90.72
£79.99
18 Months 14.9% APR
£8.00
£4.60
£90.72
£79.99
24 Months 14.9% APR
£8.00
£3.45
£90.72
£79.99
36 Months 14.9% APR
£8.00
£2.30
£90.72
£79.99
48 Months 14.9% APR
£8.00
£1.72
£90.72
£79.99
12 Months 19.5% APR
£8.00
£7.17
£94.03
£79.99
18 Months 19.5% APR
£8.00
£4.78
£94.03
£79.99
24 Months 19.5% APR
£8.00
£3.58
£94.03
£79.99
36 Months 19.5% APR
£8.00
£2.39
£94.03
£79.99
48 Months 19.5% APR
£8.00
£1.79
£94.03

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Comet GP‑3 Dual‑Band High‑Gain Co‑Linear Antenna with Pole and Radials on White Background

Comet GP-3M Dual-Band High-Gain Co-Linear Antenna (146/446 MHz)


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The Comet GP‑3 is a compact, high‑performance dual‑band base antenna designed for amateur radio operators who want excellent VHF/UHF coverage without the height or weight of larger collinear models. Using a combination of special power‑feeding techniques and a precision‑engineered phasing coil, the GP‑3 delivers impressive gain figures while maintaining a slim, unobtrusive profile.

Constructed from a one‑piece fibreglass radome, the antenna offers long‑term resistance to UV, moisture, and environmental wear, making it ideal for permanent outdoor installation. It is factory‑tuned for the 146 MHz (2m) and 446 MHz (70cm) amateur bands, ensuring optimal performance straight out of the box with no adjustments required.

Fitted with a standard SO‑239 connector, the GP‑3 integrates seamlessly with most base‑station setups. Whether you’re upgrading an existing station or building a new one, this antenna provides the gain, reliability, and build quality needed for clear, consistent communication.


Technical Specifications

SpecificationDetails
Frequency Coverage144 / 430–446 MHz
Gain4.5 dB (2m) / 7.2 dB (70cm)
Impedance50 Ω
VSWRFactory‑tuned
Max Power200 W
Length1.78 m
ConnectorSO‑239
ConstructionOne‑piece fibreglass radome
Weight1.15 kg
MountingSuitable for standard mast brackets

Comparison: Comet GP‑3 vs Diamond X‑300

A clear, customer‑friendly comparison for buyers deciding between compact performance and maximum gain.

FeatureComet GP‑3Diamond X‑300
Bands2m / 70cm2m / 70cm
Gain (2m)4.5 dB~6.5 dB
Gain (70cm)7.2 dB~9.0 dB
Length1.78 m3.0 m
ConstructionOne‑piece fibreglassFibreglass radome with aluminium elements
Max Power200 W200 W
ConnectorSO‑239N‑Type (varies by version)
TuningFactory‑tunedFactory‑tuned
Best ForCompact installations, low‑profile setupsMaximum gain, long‑range coverage

Summary

  • Comet GP‑3: Ideal for operators needing strong performance in a compact, easy‑to‑mount form factor.

  • Diamond X‑300: Better for long‑distance repeater work or rural locations where maximum gain is the priority.

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