RadioLink AT9S Pro 2.4GHz 10-Channel Transmitter with Receiver (Silver) RLKT091004

Overview

The RadioLink AT9S Pro 2.4GHz 10-Channel Transmitter with Receiver represents a significant step up for intermediate RC pilots who demand dependable control, intuitive programming and genuine room to grow their RC hobby. Building on the proven success of the AT9, the AT9S Pro adds 10 channels of control, integrated telemetry and a vibrant colour LCD display, all housed in an elegantly finished silver chassis. This is the transmitter for the RC enthusiast in the UK who operates multiple models and wants a radio system that can genuinely handle everything from fixed-wing aircraft and gliders to helicopters, multirotors, and ground vehicles without compromise.

Equipped with advanced FHSS and DSSS spread spectrum technology, the AT9S Pro delivers rock-solid full-range transmission with enhanced interference rejection—critical when flying at your local flying club or competition site where radio congestion can be a real problem. The system comes complete with the R9DS receiver, a sophisticated 9-channel receiver that supports both traditional PWM output and modern SBUS/PWM dual-signal modes, offering genuine flexibility for any model configuration. With 15 model memory slots built into the transmitter, you can store and instantly recall the settings for every aircraft, helicopter or multirotor in your hangar without reprogramming anything between flights.

What truly sets the AT9S Pro apart is the combination of professional-grade features at a price point that makes upgrading affordable for serious hobbyists. The colour LCD with intuitive menu system means that complex programming tasks—from dual rates and exponential curves to advanced mixing functions—becomes straightforward rather than frustrating. Whether you're a club flyer looking for a transmitter that will genuinely do it all, or an intermediate pilot ready to expand from single models to building a proper fleet of RC aircraft and vehicles, the AT9S Pro delivers the capability, reliability and user-friendly interface you need to enjoy RC modelling to the fullest.

Key Features

• 10 Channels of Control — Provides complete control authority for complex model aircraft, giving you the freedom to operate everything from basic fixed-wing planes to advanced helicopter swashplates, flap systems, landing gears, and sophisticated mixing functions without ever feeling limited by channel count.
• 15 Model Memory Slots — Store the complete setup for up to 15 different models with individual names, trim settings, rates and all programming intact, allowing you to switch between aircraft instantly without losing any configuration data or needing to reprogram anything.
• Colour LCD Display with Intuitive Programming — The bright, easy-to-read LCD screen with menu-driven interface makes programming accessible even for complex functions like dual rates, exponential curves, throttle curves and custom mixing, eliminating the frustration of button-based navigation found on simpler systems.
• FHSS & DSSS Spread Spectrum Protocol — Frequency-hopping and direct-sequence spread spectrum technology work together to provide superior transmission reliability, enhanced rejection of interference, and the peace of mind that comes with genuine full-range performance even in RF-congested environments like crowded flying fields.
• Integrated Telemetry System — Receiver battery voltage and RSSI (Receiver Signal Strength Indicator) telemetry come as standard, letting you monitor signal quality before flights and track receiver power in real time, with optional PRM-01 module adding motor battery voltage monitoring and optional TS100 sensor enabling GPS telemetry.
• Wide Input Voltage Range (7.4V to 15V) — Accept 2S, 3S or 4S lithium battery packs or traditional 8×AA alkaline batteries, giving you complete flexibility in choosing your power source based on usage patterns and available charging equipment.
• Reverse Polarity Protection — Transmitter battery protection guards against accidental incorrect installation, preventing expensive damage to the radio system and allowing you to focus on flying rather than worrying about reversing battery connections.
• Firmware Updates via Micro USB — Keep your transmitter current with the latest features and fixes without sending it away for service; simply connect to a computer and download updates directly from RadioLink, ensuring your system stays modern and receives new capability additions.
• 4096-Bit Resolution — Precision servo control with exceptionally high resolution delivers smooth, responsive handling that translates minor control stick inputs into subtle servo movements, critical for smooth aerobatic flying, precision gliding and stability in light wind conditions.
• Comprehensive Switch and Control Array — Four 2-position switches, three 3-position switches, one momentary switch and two proportional slider controls provide the physical inputs needed for everything from simple throttle and gear switches to complex multi-function mode selection and camera gimbal control.
• Advanced Mixing and Control Functions — Eight programmable mixers allow you to create complex linkages between controls; combined with dedicated functions for throttle cut, throttle curves, throttle delay, dual rates, exponential curves, trim step, snap roll, V-tail mixing, elevon mixing, aileron differential, flaperon control, air brake mixing and helicopter swash ring control, you can tailor the handling to match any model type.
• Flight Condition Support — Programme completely different control settings for multiple flight conditions, switching between them with a single switch input; essential for glider pilots who need different configurations for thermal climbing versus high-speed diving, or helicopter pilots shifting between normal flight and 3D aerobatics.
• Wireless Trainer Link Capability — With optional R8FM module, enable instructor/student trainer mode, allowing experienced pilots to teach newcomers safely by passing control between transmitters mid-flight without interrupting the receiver connection.
• Sturdy Metal Carry Handle — Reinforced metal handle makes transport secure and comfortable, protecting your transmitter investment during travel to the flying field whilst providing a confident grip during flight operations.
• Digital Trims — Precise digital trim adjustments replace traditional mechanical trims, offering repeatability across multiple flying sessions and the ability to fine-tune control response without affecting neutral stick position.
• Vibration Alarm — Feel immediate feedback when battery voltage drops below set thresholds or when important events occur, providing tactile warning even in noisy field environments where beeping might be missed.
• Ergonomic Design — Carefully contoured grip and button placement create a transmitter that feels natural and comfortable during extended flying sessions, reducing hand fatigue and improving overall flying performance and enjoyment.
• S-BUS Compatible — Support for S-BUS protocol allows connection to modern receivers and flight controllers that use this standard, expanding compatibility with advanced multirotor systems and next-generation aircraft designs.
• Mode Change Capable — Switch between different control stick configurations to match your preferred flying style, whether you prefer American mode (throttle on right stick), European mode (throttle on left stick) or any of the other available configurations.

Technical Performance

The AT9S Pro transmitter weighs just 828 grams without batteries, making it lightweight enough for comfortable all-day flying sessions without causing hand fatigue or neck strain from the included neckstrap. The compact dimensions of 180mm length, 213mm height with aerial folded, and 63mm width (excluding carry handle) mean the transmitter fits easily in flight cases and travel bags, yet the transmitter feels substantial and well-built in hand thanks to quality materials and precise engineering. The transmission system operates on the 2.4GHz frequency band using FHSS and DSSS spread spectrum technology, delivering interference rejection and range performance that easily exceeds the typical flying distances used in standard RC operations. The included R9DS receiver provides 9 channels of PWM output in standard mode or 10 channels in SBUS/PWM dual-signal mode, with switchable operation modes that adapt to different servo configurations; when using SBUS mode, the receiver outputs SBUS on channel 9 while providing independent PWM on channels 1-3 (useful for three-channel helicopter throttle control) and channels 6-10 for other functions. The receiver operates on supply voltages from 3V to 10V, making it compatible with virtually any model power system from small gliders running 2S LiPo batteries through large aircraft with 4S or higher voltage systems. RSSI testing conducted at 30cm distance between transmitter and receiver should show signal strength readings between 0 and -30dBm, with readings closer to 0 indicating superior signal strength; this testing protocol helps ensure reliable flight performance before committing aircraft to the air. The transmitter accepts input voltage from 7.4V minimum (the typical voltage of a fully discharged 2S LiPo battery) up to 15V maximum (representing a 4S LiPo battery with good charge), with recommended alarm voltage settings of 7.4V for 2S batteries, 11.1V for 3S batteries and 14.8V for 4S batteries to prevent over-discharge damage to lithium cells. The system supports up to 12 channels of control when connected to compatible 12-channel receivers like the R12DS or R12DSM, with the default configuration set to 10 channels and easily adjustable through the menu system. Receiver antenna placement significantly affects signal quality and range, with RadioLink's engineering guidance recommending that antennae be kept as vertical as possible and positioned away from metal components, carbon fibre structures and motor/ESC interference sources; for larger models containing metal structures or components, mounting antennae on opposite sides of the airframe ensures optimal signal reception at all flight attitudes.

What's in the Box

• RadioLink AT9S Pro 2.4GHz 10-channel transmitter in silver finish
• R9DS 9-channel receiver with switchable PWM/SBUS output modes
• Throttle stick spring retainer for natural centering feel
• Fabric neck strap for comfortable carrying during transport to flying fields

What You Need to Complete

• 8×AA-size batteries (alkaline or rechargeable NiMH) to power the transmitter, or alternatively a 2S to 4S lithium polymer (LiPo) battery pack with appropriate balance charger for greater capacity and reduced weight
• RC model aircraft, glider, helicopter, multirotor, car or boat to control
• Servo connectors and installation hardware appropriate for your specific model

Frequently Asked Questions

• Is the RadioLink AT9S Pro suitable for beginners in RC modelling? — Whilst the AT9S Pro is technically capable of supporting beginner-friendly fixed-wing aircraft and basic multirotor drones, it is specifically designed as an intermediate-level transmitter for pilots who already have some RC experience and want a system that grows with their expanding fleet. The colour LCD interface is more accessible than older button-based systems, and the comprehensive model memory means you won't need to reprogram settings when switching between different aircraft, but the depth of advanced features means there's genuinely something for everyone from intermediate to expert level.
• What batteries does the AT9S Pro transmitter need, and how long will it run? — The transmitter accepts either 8×AA batteries (alkaline or rechargeable NiMH) or alternatively 2S, 3S or 4S lithium polymer battery packs rated for 7.4V to 15V input. RadioLink strongly recommends using dedicated lithium chargers and understanding lithium battery characteristics to prevent damage and fire risk. The transmitter should not be charged via the Micro USB port—this is exclusively for firmware upgrades, not charging. Runtime varies based on battery capacity and usage patterns, but typically provides several hours of continuous operation from eight AA batteries or comparable LiPo packs.
• What is the difference between the AT9S and AT9S Pro, and which should I choose? — The AT9S Pro represents an enhanced version of the original AT9S, with additional features and improved capability; the main distinction centres on the AT9S Pro's enhanced firmware, expanded feature set and generally superior performance across all operating parameters. Once you own an original AT9S, it cannot be upgraded to Pro specification through firmware updates alone—if you specifically need Pro features, you must purchase the AT9S Pro model.
• How do I bind the receiver to the transmitter, and can I use this system with other manufacturers' receivers? — RadioLink receivers and transmitters must be bound to each other by holding the receiver's ID SET switch for one second or longer until the LED enters a flashing state, then releasing it; when the LED becomes solid, binding is complete and the transmitter should display a signal tower icon on the LCD screen. RadioLink products are proprietary and closed-architecture—RadioLink transmitters only work reliably with RadioLink receivers, and RadioLink receivers only operate with RadioLink transmitters. However, when using the external Crossfire high-frequency module, the AT9S Pro can communicate with Crossfire receivers instead. Other third-party brand receivers are not compatible with this transmitter.
• What model aircraft types can I control with the AT9S Pro's 10 channels? — The transmitter supports fixed-wing power aircraft, gliders with various aileron and flap configurations (1 aileron + 1 flap, 2 aileron + 1 flap, or 2 aileron + 2 flap), helicopters with full swashplate control, multirotors, radio-controlled cars and radio-controlled boats. Within each category, the advanced mixing functions including V-tail mixing, elevon mixing, aileron differential, snap roll control and others allow you to customise the control response to match your specific model's needs.
• Can I use the AT9S Pro as a trainer transmitter to teach someone else? — Yes, with the optional R8FM wireless trainer module installed, the AT9S Pro supports wireless trainer link functionality, allowing two transmitters to communicate with a single receiver. This enables experienced pilots to hand control to student pilots mid-flight and take it back instantly without interrupting the receiver connection—an invaluable training tool.
• What telemetry features does the AT9S Pro provide, and do I need additional sensors? — The transmitter includes receiver battery voltage and RSSI (signal strength) telemetry as standard features, displayed on the colour LCD screen. For enhanced telemetry including motor battery voltage monitoring, you need to add the optional PRM-01 return telemetry module. For GPS data including aircraft altitude, location coordinates, and climb/descent rates, you need the optional TS100 sensor. Neither of these modules is included as standard.
• How do I update the firmware, and where do I download new versions? — The transmitter includes a Micro USB port on its rear panel exclusively for firmware updates—this is not for charging batteries, and using Android phone chargers on this port risks damage. Connect the transmitter to a computer via Micro USB cable and visit RadioLink's official website at www.radiolink.com to download the latest firmware versions and follow their step-by-step upgrade instructions. Firmware updates are free and add new features and improvements periodically.
• What is the control range, and how do I test signal strength before flying? — RadioLink specifies that the AT9S Pro delivers full-range control suitable for normal RC operations, with signal quality verified by testing RSSI values. Before each flight, connect the transmitter and receiver with antennae held vertically parallel at approximately 30cm distance, access the telemetry screen on the LCD, and verify that RSSI values fall between 0 and -30dBm, with values closer to 0 indicating superior signal strength. This simple test prevents signal-related failures from causing loss of control during flight.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the RadioLink AT9S Pro 2.4GHz 10-Channel Transmitter with Receiver (Silver) RLKT091004 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.