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

**VERDICT: Retevis RHD-771**

Both antennas are electrically identical. At 146 MHz they're both electrically short at 0.19 wavelengths, delivering realistic -1.0 dBi performance. At 435 MHz they're both 5/8 wave, delivering realistic 2.9 dBi. The 5 mm length difference is negligible. The single most important differentiator is price: the Retevis undercuts the Nagoya by more than half, at 9.99 dollars versus 20.98 dollars, with no performance penalty whatsoever.

The Nagoya's claimed 3 dBi gain is overstated for its 396 mm length. The Retevis claims 2.15 dBi, which aligns better with its electrical characteristics. Both antennas report strong owner satisfaction, with the Nagoya at 4.6 out of 5 stars from 12961 reviews and the Retevis at 4.5 out of 5 from 919 reviews. That review count difference reflects market presence, not superiority.

Buy the Retevis RHD-771 if you want identical performance at half the price. Buy the Nagoya NA-771 only if you need the larger Amazon review base as reassurance of supply chain consistency.

Get the Retevis. It's the smart choice here.