Sound Devices A-VHF-HEL-SMA Antenna (Pair)

Quarter-Wave Helical VHF Antennas for A20-RX Receivers
The Sound Devices A-VHF-HEL-SMA antenna pair is purpose-built to deliver strong RF performance in the VHF spectrum when paired with the A20-RX wireless receiver. Operating in the 169 to 220 MHz range, these 1/4-wave helical SMA antennas offer enhanced signal reliability and reception for production sound professionals who depend on stable wireless audio in challenging RF environments.

Optimized for 169–220 MHz VHF Band Operation
VHF wireless systems are increasingly important for their long-wavelength advantages, including better range and reduced congestion compared to UHF. The A-VHF-HEL-SMA antennas are tuned specifically to cover the 169–220 MHz VHF band, making them a great choice for users who need dependable wireless performance in locations where spectrum conditions can be unpredictable.

Compact and Lightweight for Bag or Cart Rigs
Built with mobility in mind, these antennas feature a compact helical design that minimizes profile without compromising RF performance. Their short length and flexible SMA connectors make them ideal for setups where space is limited, including sound bags, cart-based systems, or portable rigs.

Helical Design Improves Circular Polarization
The helical coil construction of these antennas not only contributes to a compact form factor but also improves circular polarization. This helps reduce signal dropouts caused by antenna orientation mismatches between the transmitter and receiver, a common issue in dynamic production environments.

SMA Connectors Provide Easy Integration
With standard SMA connectors, these antennas mount easily to the A20-RX receiver without tools. The secure connection ensures reliable signal transmission and a solid mechanical interface that withstands the rigors of field production, from location shoots to live events.

Rugged Build for Demanding Production Use
Designed for real-world applications, the A-VHF-HEL-SMA antennas are made to handle travel, transport, and daily on-set use. Their coiled structure is flexible yet durable, allowing for frequent reconfiguration or repositioning without compromising signal integrity.