Comet CH-32 (BNC) vs Diamond SRJ77CA (BNC)

The Diamond SRJ77CA is the clear winner here. It delivers substantially better performance at a lower price, making this an easy choice for most users.

The single most important differentiator is electrical length. The Comet CH-32 is severely compromised at both bands, measuring only 0.02 wavelengths on VHF and 0.06 on UHF. This results in poor real-world gain of -9.0 dBi and -5.3 dBi respectively. The Diamond, by contrast, achieves a respectable 0.20 wavelengths on VHF with -0.9 dBi gain, and an excellent 5/8 wave on UHF at 3.0 dBi. This is the difference between a marginally functional antenna and one that actually works.

The Comet's 44 mm rigid stub might appeal to users needing extreme portability or durability, but this advantage is vastly outweighed by its electrical shortcomings. The Diamond's 405 mm flexible whip is still compact enough for handheld use while providing the electrical length needed for real performance.

Buy the Comet CH-32 only if you absolutely cannot accommodate a 405 mm antenna. Buy the Diamond SRJ77CA for everything else: it's cheaper, more flexible, and genuinely performs on both bands. This is a no-brainer recommendation for the Diamond.