RadioRanked verdict
Diamond Antenna
Diamond SRJ77CA (BNC)
Between Diamond's two BNC whips, this is the one to buy. It is marginally better on both bands than the RH77CA, does not overstate its gain, and has the review record to back it up.
Proprietary RR score
How we scored it
Performance is derived from the antenna's length in wavelengths on each band it covers, not from the advertised gain. How we score →
Length versus wavelength
What 405 mm Buys You
An antenna radiates according to its length measured in wavelengths, not according to the number on the packaging. Here is where this one lands on each band it covers.
| Band | Wavelength | This antenna | Works out as |
|---|---|---|---|
| VHF146 MHz | 2053 mm | 0.20 λ | electrically short |
| UHF435 MHz | 689 mm | 0.59 λ | 5/8 wave |
Decision helper
Is this antenna right for you?
Yes, if you're…
- ✓BNC-equipped Icom, Yaesu, and Vertex handhelds
- ✓Buyers who want the better-reviewed of Diamond's two BNC whips
Skip it, if you're…
- ✕Budget buyers; SMA clones match this electrically for less
- ✕SMA-connector radios (wrong jack)
Tradeoffs
The good and the bad
What we like
- Slightly better electrical length than the RH77CA on both bands
- No inflated gain claim to second-guess
- Large, strong review record (600+)
- Reputable brand and BNC build quality
What we don't
- Still mediocre on 2m in absolute terms
- Costs more than SMA whips with comparable electrical performance
Ready to buy?
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Overview
The Diamond SRJ77CA is a 405mm dual-band whip with a BNC connector, a half inch longer than Diamond's own RH77CA. It is built for the same BNC-equipped Icom, Yaesu, and Vertex-style handhelds, and it carries the largest review count of any BNC whip in this lineup at over 600, with a 4.6-star average. It runs around $26.
That extra length helps on both bands. At 405mm, the electrical length is about 0.20 wavelengths on 2m, still mediocre but slightly better than the shorter RH77CA, and about 0.59 wavelengths on 70cm, solidly in the 5/8-wave range and marginally ahead of the RH77CA's half-wave figure there too. The listing does not print a gain number, which sidesteps the inflated-claim problem entirely and is honestly refreshing. This is a small, real step up over the RH77CA for a dollar more, backed by a much larger review sample.
Specifications
| Frequency bands | VHF, UHF |
| Connector | BNC |
| Length | 405 mm |
| Antenna type | whip |
| Flexible | Yes |
| size | Small |
| color | Black |
| unitCount | 1 |
Key Features
- Enhanced Dual-Band Performance: Optimized for 144 MHz (VHF) and 430 MHz (UHF) operation, providing extended range and crystal-clear transmission for handheld HAM and scanner radios.
- Compact, Portable, and Lightweight: At just 40.5 cm long, the SRJ77CA is designed for everyday portability, reducing stress oan radio connectors while maintaining full-range reception.
- Durable Construction for Field Use: Built with flexible, high-strength materials and a weather-resistant coating to withstand demanding field, emergency, and outdoor conditions.
- Compatible with standard handheld HT connectors, the SRJ77CA installs quickly on a wide range of Diamond and other brand dual-band radios, providing reliable performance for casual and professional operators alike.
- Ideal for Amateur & Professional Applications: Perfect for HAM radio enthusiasts, emergency communication teams, and public safety professionals seeking reliable portable antenna performance.