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4O3A Parts and Accessories
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 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 1A2R Radio Switches
The 4O3A 1A2R Radio Switch is engineered to allow a single amplifier to be safely shared between two radios, making it an ideal solution for SO2R (Single Operator Two Radios) contesting or multi-radio station setups. It uses a "first PTT wins" logic, ensuring that only one radio can access the amplifier at a time, preventing signal conflicts and potential equipment damage. Each radio's PTT control can be independently disabled via a dedicated switch, offering added flexibility during operation. Once installed, the switch eliminates the need for manual rewiring—your amplifier remains permanently connected and ready. In the event of a failure during SO2R operation, the amplifier can be quickly reassigned from Radio B to Radio A, providing a reliable backup path.
Not Yet Reviewed
$515.99
4O3A Switchable 3:1 Coaxial Power Splitter/Combiners
4O3A Switchable 3:1 Coaxial Power Splitter/Combiners can be used to split power between one, two, or three antennas/directions, or to combine two or three antennas. They are broadband, and capable of operating from 1.8–30MHz, with excellent matching and a well-designed PCB and circuitry. The PS-3000RX can be controlled using Station Genius or any manual switch controller that provides +12VDC for antenna selection. The SPLIT relay inserts a 50-to-22-Ohm transformer for matching when using two or three antennas.
Not Yet Reviewed
$549.99
Clearance
Open Box
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
$775.99
$737.19