Availability
4O3A Antennas
4O3A Antenna Genius 8X2 Smart Antenna Switches
4O3A Antenna Genius 8X2 Smart Antenna Switches are high-performance, LAN-enabled antenna switches that connect eight antennas to two radios—ideal for SO2R (Single Operator, Two Radio) and multi-operator contesting. Designed for seamless integration with FlexRadio systems and third-party radios, they support automatic or manual antenna switching via LAN, BCD, or the downloadable Windows control app. Built with a rugged stainless steel chassis and advanced hardware-level interlocks, the AG8X2 ensures that no two radios can transmit on the same antenna simultaneously, protecting your equipment. With exceptional port-to-port isolation and support for up to 3000W, the Antenna Genius 8X2 delivers reliable, high-isolation switching for demanding HF and 6m operations.
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$1,039.99
4O3A HFC4500 Signature Series Antenna Triplexer/Combiners
4O3A HFC4500 Signature Series Antenna Triplexer/Combiners are truly a game changer for SO2R, multi-operator contest stations, DXpeditions, and Field Day operation. They allow a single triband 20/15/10-meter Yagi antenna, fed with one coaxial feedline, to be used by three stations simultaneously, with each station running up to 4.5kW. The 4O3A Signature Series Triplexer System eliminates the need for separate monoband Yagi's on the 20m, 15m, and 10m bands. Three operators, three stations, and three amps—but only one feedline and one antenna. The 4O3A HF Triplexer System uses the high-power HFC4500 Combiner, which connects to a triband 20m/15m/10m antenna, and provides dedicated ports for 20m, 15m, and 10m. Each port must be connected to a 4O3A Series S Bandpass Filter. The Combiner is not intended for standalone use.
Not Yet Reviewed
$642.99
4O3A AB Switch Relay
The 4O3A AB Switch Relay is a high isolation A/B switch, needed for some applications such as extension of an antenna matrix. The most common use case is routing the antenna between two existing high isolation antenna switches, so the isolation of this A/B Relay isn't quite as high as the RS3000 or 1A2R. Additional isolation is realized by grounding of the unused port. AB switch is powered by 13-15V through a dedicated power connector. It has an LED to indicate "out B" status. When powered off the input is routed to out A. AB Switch Relay Specifications: Port-to-port isolation at 30MHz: 56db to 70 dB (On/Off status) RF Power Handling (max.): 4000W Connectors: 3 x SO-239 (O3A-4O-AB-PL) Power: 12V DC @ 120mA Power Indication: LED diode Dimensions, WHD: 3.35 x 5.31 x 2.76 in. (85 x 135 x 70 mm) Weight: 0.22 lbs. (0.1 kg)
Not Yet Reviewed
$181.99
4O3A High Power Band Pass Filters
4O3A High Power Band Pass Filters are intended for installation on the output side of a linear amplifier, filtering out harmonics as well as broadband noise from the power amplifier. Typical Applications: • Mitigating intra and inter station interference during contests. • Protecting receiver circuitry from damage. • Reducing RFI egress and ingress during everyday operation. • Enabling full duplex operation (transmitting and receiving simultaneously) on capable transceivers. • High power handling capability – up to 4,500 Watts ICAS. • Exceptional out of band rejection, typically > 55 dB and sometimes as high as 75 dB on adjacent 'contest' bands thanks to the 5 pole filtering.
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$515.99
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$557.99
4O3A 8xAB Antenna Switches
4O3A 8xAB Antenna Switches integrate eight independent A/B switches into a single compact unit, enabling seamless switching between multiple antennas and radios. When paired with two 403A Antenna Genius switches (O3A-40-AG8X2 or O3A-40-AG8X2-N), it forms a powerful 8×4 antenna matrix, allowing up to eight antennas to be routed to four radios with exceptional isolation. Built with the needs of high-power stations in mind, the 8xAB Switch delivers robust performance, intuitive operation, and a clean, maintainable installation. The primary motivation behind the 8xAB switch is the integration of two Antenna Genius smart switches into an 8×4 Super Switch.
Not Yet Reviewed
$465.59
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$775.99
4O3A Rotator Genius Smart Rotator Controllers
4O3A Rotator Genius Smart Rotator Controllers are a high-precision, network-enabled rotator controllers that use a magnetic sensor to read azimuth. They support control via Windows and Android apps and integrate with the 4O3A Genius ecosystem. Typically mounted at the base of a tower in a waterproof housing or installed in the shack, they are compatible with most rotators and control is provided via LAN, USB, or Wi-Fi. A built-in web interface allows multi-user access and full remote operation. Rotator Genius supports independent control of two rotators, making them suitable for stacked arrays or complex installations.
Not Yet Reviewed
$869.99
403A Antenna Genius 8X1 Smart Antenna Switches
403A Antenna Genius 8X1 Smart Antenna Switches are designed to connect up to eight antennas to a single radio with seamless control and automation. Engineered for reliability and flexibility, they integrate effortlessly into both local and remote station installations. Whether you're a contester, DXer, or casual operator, the Antenna Genius 8x1 offers robust switching capabilities, intuitive software control, and future-proof expandability through regular firmware updates and third-party software support.
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$839.99
4O3A OM Module Programmable Output Relay Modules
4O3A OM Module Programmable Output Relay Modules are designed for integration with the Antenna Genius 8x2, 8x1, or Station Genius controllers. Housed in a durable stainless steel enclosure, these Output Modules feature 16 dual-output relays, each with independent A and B terminals that can be configured for positive voltage, ground, or a combination of both. This flexibility allows for precise control of external devices such as antenna switches, bandpass filters, or other station automation components. Each output is clearly labeled and equipped with an LED indicator, providing instant visual feedback on relay status. Whether you're building a high-performance contest station or automating a complex RF environment, the OM Module delivers reliable switching with intuitive configuration via Windows-based software associated with the supported controllers.
Not Yet Reviewed
$185.99
4O3A Rotator Genius Magnetic Azimuth Sensors
4O3A Rotator Genius Magnetic Azimuth Sensors are calibrated, highly accurate, magnetic azimuth sensors (i.e. a magnetic compass) designed to provide precise antenna direction feedback for Amateur Radio rotator systems. They deliver azimuth readings with ±1° accuracy and connect via standard CAT5e Ethernet cable. While it's intended to work with the Rotator Genius controller, they can also be used as a standalone solution for azimuth readout when paired with a compatible RS485-to-USB or RS232 converter (sold separately) and paired with the downloadable AzimuthReader Microsoft Windows application. Housed in a waterproof enclosure, these sensors are ideal for boom-mounted installations and eliminate the need for traditional pulse or potentiometer-based sensors, offering a reliable and maintenance-free alternative.
Not Yet Reviewed
$126.99
4O3A S8 Antenna Genius Manual Controllers
4O3A S8 Antenna Genius Manual Controllers are designed to be used with the Antenna Genius, Antenna Switch 8x2, and Power Splitter PS3000RX when no band data or control signal is available from the transceiver or PC, requiring manual switching. It enables manual antenna selection for Antenna Genius, is required for operating the 8x2 switch without a computer or band decoder, and supports manual control of the PS3000RX splitter. For PS3000RX use, the S8 can be modified with a diode matrix to allow selection of single antennas or phased combinations. The controller connects via a 15-pin cable. When used with Antenna Genius, it is powered through pins 9–10. For third-party devices, a 13–15VDC power supply is required (not included).
Not Yet Reviewed
$59.99
4O3A RS3000 2x2 Reversible Coaxial Crossover RF Switches
4O3A RS3000 2x2 Reversible Coaxial Crossover RF Switches are high-power, 2x2 coaxial crossover switch designed to instantly swap antennas and amplifiers between two radios—ideal for SO2R, Multi-Single (MS), or Multi-Two (M/2) contest configurations. With the push of a button, operators can dynamically reassign the best antenna and amplifier setup to the radio that needs it most—perfect for chasing multipliers or breaking pileups when the in-band station needs more firepower. The RS3000 simplifies station automation by allowing seamless reconfiguration of RF paths without physically rewiring. It supports local control or remote switching via the optional RS3000 Controller (sold separately), which includes PTT interlock logic to prevent switching during transmission—ensuring safe and interference-free operation.
Not Yet Reviewed
$379.99
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$389.99
4O3A QPXC-8 Triplexer Extenders
4O3A QPXC-8 Triplexer Extenders are designed to meet the needs of large station setups, with flexibility as a core feature. Instead of using a fixed quadriplexers with four band-specific outputs, the QPXC-8 functions as an extension to the existing triplexer system, allowing for more versatile signal routing. It is compatible with both 4O3A filters and filters from other manufacturers.
Not Yet Reviewed
$909.99
4O3A RS3000 Reversible Switch Controllers
4O3A RS3000 Reversible Switch Controllers are designed to improve the safety and efficiency of the RS3000 2x2 Reversible Coaxial Crossover Switch system. They ensure switching between radios and antennas only occurs when neither connected radio is transmitting, preventing accidental switching if one user begins transmitting while the other is still on the air. This makes it ideal for SO2R (Single Operator, Two Radios), MS (Multi-Single), or M2 (Multi-Two) contest configurations. These switch controllers operate on 13–15VDC input. A 3-pin DC output (5.08 mm pin header) connects to the RS3000 Crossover Switch. Before use, connect the PTT lines from both radios to the controller's RCA jacks. The controller connects to the RS3000 switch via the +12V/GND terminals. If a user attempts to switch while the other is transmitting, the controller delays the switch until the PTT line is inactive. During this delay, the "Wait" LED is illuminated. This ensures safe switching regardless of transmission frequency.
Not Yet Reviewed
$149.99
4O3A A50 Antenna/Load Switches
4O3A A50 Antenna/Load Switches serve as 50-ohm loads for open ports on the HFC4500 combiner or other multiplexer, preventing tuning degradation. Applying 12V power connects the input to the combiner's output, linking it to the corresponding combiner or filter. A typical setup switches a filter or a combiner to a monoband antenna. When the A50 is not powered, the switch defaults to a 50-ohm termination for the input and the antenna output is open. NOTE: The A50 is NOT an A/B switch. The manufacturer's label of "A/B Switch" is a product grouping, NOT an indication of the function of this product. The LOAD resistor is internal, so one of three connectors is unnecessary, which leaves an open hole in the chassis, a "normal feature" of the A50.
Not Yet Reviewed
$118.29
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$181.99