Comet SMA-24J (SMA-Female) vs Nagoya NA-771G (GMRS)

The Nagoya NA-771G is the clear winner for its intended purpose, but the choice depends on your primary band.

The single most important difference is electrical length optimization. The Nagoya is engineered specifically for GMRS at 465 MHz, where it achieves a realistic 3.1 dBi gain at 0.60 wavelengths. The Comet SMA-24J is a dual-band compromise that performs well on UHF at 435 MHz (2.9 dBi) but falls short on VHF at 146 MHz, where its 0.22 wavelength length leaves it significantly compromised. The Comet's claimed 3.5 dBi gain is overstated for actual performance.

Buy the Nagoya NA-771G if you operate primarily on GMRS or have a dedicated handheld for that band. Choose the Comet SMA-24J only if you genuinely need dual-band VHF/UHF capability and can accept mediocre VHF performance as the trade-off.

For most users, the Nagoya makes more practical sense. It's cheaper, shorter for easier carry, better optimized for modern GMRS handhelds, and delivers honest performance without marketing exaggeration. Its higher overall score reflects this focused engineering approach.