Nagoya NA-771 (SMA-Female) vs Retevis RHD-771 (SMA-Female)

The Retevis RHD-771 is the clear winner here. These antennas are electrically identical: both measure roughly 391-396mm and deliver the same realistic performance across VHF and UHF. On VHF at 146 MHz, both are electrically short at 0.19 wavelengths, yielding approximately -1.0 dBi. On UHF at 435 MHz, both achieve a proper 5/8-wave electrical length with realistic 2.9 dBi gain. The single most important differentiator is price. The Retevis undercuts the Nagoya by more than half, costing $9.99 versus $20.98, while delivering essentially equivalent performance. The Nagoya's claimed 3 dBi gain is also overstated relative to its actual electrical length, whereas the Retevis claims a more modest 2.15 dBi. The RHD-771 scores higher at 88/100 versus 86/100, reflecting this honest specification approach.

Buy the Retevis RHD-771 if you want solid mid-band performance without overpaying. Buy the Nagoya NA-771 only if you specifically require its marginal construction quality differences, though the cost premium is difficult to justify given identical electrical performance.

Get the Retevis. It's the better value by a significant margin.