The Diamond SRH775 is a high-performance dual-band telescopic antenna engineered for handheld transceivers operating on VHF (144 MHz / 2 m) and UHF (430 MHz / 70 cm). Manufactured by Diamond Antenna to exacting Japanese standards, it provides a substantial gain and range upgrade over standard OEM rubber duck antennas, making it an essential accessory for radio amateurs, emergency responders, and field monitoring operators.
Extending to a full length of 44 cm, the SRH775 operates as a 1/4-wave element on 144 MHz and an efficient 1/2-wave radial-independent radiator on 430 MHz with 2.15 dBi of gain. Beyond dual-band transmission (rated up to 10 W), its wideband receiving architecture makes it ideal for wideband communications receivers and scanners, covering 120, 150, 300, 450, 800, and 900 MHz reception bands (including Airband and commercial utility traffic). Fitted with a standard SMA Male (SMA-P) connector, it screws directly onto handheld radios featuring an SMA Female chassis mount.
Recommended Applications
Amateur Radio Operations (VHF/UHF)
Dramatically improves simplex and repeater access on 2 meters and 70 centimeters compared to compact stubby antennas.
Airband and Scanner Monitoring
Broadband receiving coverage allows clear reception across civil aviation (120 MHz), public safety, UHF utilities, and 800/900 MHz commercial bands.
Field Operations and Emergency Preparedness
Collapses quickly for protected transport and extends to 44 cm on demand when long-distance communication is critical.
Why Choose the Diamond SRH775?
Unlike fixed-length whip antennas that can be cumbersome during transport or generic aftermarket antennas with high VSWR, the Diamond SRH775 combines telescopic convenience with precision RF tuning. Weighing just 41 grams, its high-conductivity multi-section telescopic mast ensures optimal RF radiation efficiency, low insertion loss, and durable performance across extended field deployments.
Technical Specifications
| Feature | Specification |
|---|---|
| Brand | Diamond Antenna |
| Model | SRH775 |
| TX Frequency Bands | 144 / 430 MHz (2 m / 70 cm) |
| RX Frequency Coverage | 120, 150, 300, 450, 800, 900 MHz (Receiving only) |
| Gain | 2.15 dBi (430 MHz) |
| Maximum Power Rating | 10 W |
| Nominal Impedance | 50 Ohms |
| Electrical Type | 1/4 wave (144 MHz) / 1/2 wave (430 MHz) |
| Connector Type | SMA Male (SMA-P) |
| Full Extended Length | 44 cm |
| Weight | 41 g |
Key Highlights
- Dual-band transmission on 144 MHz (VHF) and 430 MHz (UHF).
- Extended wideband RX reception: 120 / 150 / 300 / 450 / 800 / 900 MHz.
- Telescopic design extends to 44 cm for maximum RF range.
- 2.15 dBi gain on 430 MHz with 1/2-wave efficiency.
- Standard SMA Male (SMA-P) connector compatible with standard SMA Female radios.
- Lightweight 41 g construction with genuine Diamond quality.
Package Contents
- 1x Diamond SRH775 Dual-Band Telescopic Antenna (SMA Male).
Frequently Asked Questions
What does connector “SMA-P” mean?
“SMA-P” (Plug) denotes a standard SMA Male connector featuring internal threading with a center male pin. It connects directly to handheld radios that feature an SMA Female connector (external thread with center receptacle).
Can this antenna transmit on the Airband or 800 MHz frequencies?
No, transmission is strictly rated for the 144 MHz and 430 MHz amateur bands up to 10 W. Frequencies such as 120, 150, 300, 450, 800, and 900 MHz are for reception (RX) only.
