Comet CA-2X4SR Dual-Band Mobile Antenna 144/440 MHz - Wideband

Our review of the Comet CA-2X4SR concludes it is a practical, high-performance mobile antenna for operators who need reliable VHF and UHF coverage from a single, compact installation. The CA-2X4SR stands out for its wideband coverage and clear gain figures, making it a sensible choice for amateur radio operators, commercial users, and public safety personnel who want better range and reception without a large mast. Installation is straightforward on standard NMO-style mounts and the rugged construction suits on-vehicle use where durability matters most.

Key Features

• Dual-band wideband: Covers 140-160 MHz and 430-470 MHz so one antenna supports both 2m and 70cm operations across common ham, commercial, and safety frequencies.
• High gain performance: Delivers 3.8 dBi on 2m and 6.2 dBi on 70cm to improve transmit reach and received signal clarity compared with many low-gain mobile whips.
• Rugged construction: The fiberglass whip and stainless-steel base are built for repeated mobile use and resist weathering on vehicles over time.
• Compact height: At about 38 in overall height the antenna fits cars, trucks, and communication vehicles without excessive clearance issues.
• NMO-style mounting: Compatible with common mobile antenna bases for easy installation and removal when needed.
• Precision tuning: Designed and tuned by Comet to reduce interference and provide consistent performance across the specified frequency ranges.

Who It's For

The CA-2X4SR is best for amateur radio operators and mobile communicators who want a single antenna that covers both VHF and UHF bands with useful gain and a compact footprint. It also suits commercial and public safety vehicles where durability and reliable performance are priorities.

Those who need extreme gain for base-station work, or users requiring integrated multifunction features like cellular or GPS combined antennas should look elsewhere; this model is focused on VHF/UHF radio performance rather than multi-service integration.

Pros & Cons

Pros

• Strong dual-band performance that supports both 2m and 70cm use without swapping antennas.
• Notable gain figures on both bands for improved range and reception in mobile scenarios.
• Durable materials and NMO-style base make it suitable for vehicle mounting and field use.
• Easy installation and compact height work well for everyday driving and limited-clearance environments.

Cons

• Coverage reports are mixed for some users, so performance can vary by vehicle and mounting location.
• Not designed as a multi-service antenna; no built-in cellular or GPS capability.

Specifications

Frequency ranges	140-160 MHz, 430-470 MHz
Gain	3.8 dBi (2m), 6.2 dBi (70cm)
Power rating	200 W
Mount type	NMO-style stainless-steel base
Overall height	38 in (approx)
Finish	Durable black fiberglass whip

Our Verdict

The Comet CA-2X4SR is a practical, value-minded mobile antenna for operators who need reliable 2m and 70cm coverage from one compact unit. With solid gain numbers, durable construction, and simple NMO installation, it represents good value for mobile amateur and commercial users who prioritize VHF/UHF radio performance over multi-function integration.

Frequently Asked Questions

Will this antenna work on common ham frequencies?
The antenna covers 140-160 MHz and 430-470 MHz, which includes the common 2m and 70cm ham sub-bands used by many operators.

Is the mount compatible with vehicle bases?
Yes, the CA-2X4SR uses an NMO-style stainless-steel base that fits most standard mobile antenna mounts.

Is it durable enough for daily on-vehicle use?
Yes, the fiberglass whip and stainless-steel base are designed for rugged mobile operation and exposure to typical weather conditions.