RadioRanked verdict
Diamond Antenna
Diamond SRH770S (SMA-Male)
A good upgrade for a Yaesu, Icom or Kenwood handheld owner who wants more reach than a stock whip and does not mind the length. Baofeng and BTECH owners should look at a whip that fits their jack, such as the Nagoya NA-771.
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 700 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 | 0.34 λ | between quarter and half wave |
| UHF435 MHz | 689 mm | 1.02 λ | full wave |
Decision helper
Is this antenna right for you?
Yes, if you're…
- ✓Yaesu, Icom and Kenwood handheld owners who want more reach
- ✓Indoor and low-ground operation where a stock whip falls short
Skip it, if you're…
- ✕Baofeng and BTECH owners (the Nagoya NA-771 fits those radios)
- ✕Anyone who carries the radio on a belt or pack all day
- ✕Mobile radios or any rig above 10 W
Tradeoffs
The good and the bad
What we like
- About twice the length of a typical 15-inch handheld whip
- 0.34 wavelengths on 2m and 1.02 on 70cm, long for a handheld
- SMA-Male fits Yaesu, Icom and Kenwood handhelds directly
- Two-piece construction folds to about 50 cm for transport
What we don't
- SMA-Male does not fit Baofeng or BTECH radios without an adaptor
- Bulky: a buyer calls it quite bulky to carry
- 10 W rating means handhelds only, not mobile radios
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Overview
The SRH770S is a long replacement whip for 2m and 70cm handhelds: 27.56 inches (700 mm), 45 g, rated for 10 W, with wide-band receive. The SMA-Male base fits the SMA-Female jack on Yaesu, Icom and Kenwood handhelds (reviewers use it on the FT-60, FT-70D, FT2D and VX-8DR). It does not fit Baofeng or BTECH radios without an adaptor.
It is about twice the length of a typical 15-inch handheld whip. A handheld has no ground plane worth the name, so length does most of the work: our model puts it at 0.34 wavelengths on 2m and 1.02 on 70cm. One reviewer reports reaching three local repeaters from inside a cement block building, where a shorter Diamond whip reached one.
The cost is bulk: it is two pieces, about 50 cm folded for transport, and a buyer calls it quite bulky to carry. At 10 W it is for handhelds only, never a mobile radio.
Specifications
| Frequency bands | VHF, UHF |
| Connector | SMA-Male |
| Length | 700 mm |
| Antenna type | whip |
| color | Black |
| unitCount | 1 |
Fits These Radios
Radios we track that take a SMA-Male antenna and cover this antenna's bands. Top-scoring picks first.
Key Features
- 27.56 in (700 mm) two-piece whip, 45 g
- SMA-Male connector for SMA-Female handheld jacks
- 0.34 wavelengths on 2m, 1.02 wavelengths on 70cm
- 10 W max power
- Dual-band 2m and 70cm with wide-band receive
- VSWR under 1.5 (Diamond's figure)