The RadioMaster TX16S has long been a legend in the FPV and RC community. It’s the radio you see in the hands of pros like Mr. Steele and JohnnyFPV, a testament to its open-source power and versatility . But the RC world doesn’t stand still. Enter the RadioMaster TX16S MK3 MAX, a radio that doesn’t just iterate; it refines the legend into a commanding flagship that feels like it's from the future.

After spending some quality time with this "beastly bit of kit," it's clear that RadioMaster has delivered something truly special for the discerning pilot .

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What's in the Box? The "MAX" Experience

Right out of the gate, the "MAX" designation tells you this isn't just a standard transmitter. It’s a statement . The unboxing experience is premium, but the real star is the transmitter itself. Available in striking colors like Black, Red, Blue, and Gold, the unit I tested exudes quality .

The premium carbon-fiber-style finish paired with leatherette side cheeks gives it a grip that feels comfortable and secure during long sessions . It’s got a reassuring weight (864g without a battery) that speaks to its solid build, but you will definitely know you’re holding it . This is a full-size radio; it's not about pocketability, but about commanding presence and control .

Core Features: A Command Center for Your Drone

AG02 CNC Hall Gimbals: The Heart of Precision

The headline feature of the MAX edition is undoubtedly the AG02 CNC Aluminum Hall Sensor Gimbals . If the AG01 was great, the AG02 is on another level. They feel incredibly smooth, precise, and robust. The quad-bearing design and all-metal construction translate directly to the sticks, providing a level of control that makes fine movements feel effortless .

One of the best improvements is the front-access spring tension adjustment. On many radios, adjusting stick feel requires opening the case. On the MK3 MAX, you can fine-tune the tension right from the front of the gimbal, making it a breeze to dial in your perfect feel on the fly. You can also adjust the travel limits for both vertical and horizontal axes externally . These gimbals are truly the foundation of the MK3 MAX’s premium feel .

A Massive 5-Inch IPS Touchscreen

This is a game-changer. The 5-inch, 800 x 480 IPS touchscreen is the largest and clearest screen ever seen on an open-source radio . It’s bright, responsive, and makes navigating the EdgeTX operating system an absolute joy. No more endless button pressing. Programming models, adjusting settings, and managing widgets is now an intuitive, touch-friendly experience . The automatic backlight adjustment is a thoughtful touch, making the screen easily readable whether you're in a dark workshop or under the bright sun .

Dual-Band Gemini-X ExpressLRS

Under the hood, this radio is a connectivity powerhouse. It features a built-in, dual-band ExpressLRS module that supports both 2.4GHz and Sub-G 900MHz frequencies . This is the Gemini-X system in action, using two separate radio links to provide unprecedented reliability and signal stability .

What’s great is that while it supports Gemini receivers, you’re not forced to use them. The radio is fully compatible with standard ELRS receivers, giving you total flexibility to build your fleet however you want .

The Power of EdgeTX

At the core of the TX16S MK3 MAX is the EdgeTX open-source firmware . This is the operating system, and it’s what allows for such profound customization. The onboard STM32 H7 processor provides ample power to run complex LUA scripts, high-speed telemetry, and demanding widgets, all without lag . If you’re someone who loves to tweak and customize every aspect of your radio, EdgeTX is your playground.

Usage Rules and Getting Started

For those new to ExpressLRS and EdgeTX, the TX16S MK3 MAX, while powerful, does have a learning curve . However, RadioMaster has made the setup process more streamlined than ever.

Firmware and Binding

The radio comes pre-flashed with EdgeTX and ExpressLRS, but to get the most out of it, you'll want to learn the update process . Using the ExpressLRS Configurator PC software, you can flash the latest firmware to the internal module. While not always necessary, updates bring new features and performance enhancements .

A key part of this is using a Binding Phrase. Instead of the traditional bind button process, you enter a unique phrase in the Configurator and flash it to both your transmitter and receiver. They will then bind automatically, simplifying the process significantly .

Updating EdgeTX

The ExpressLRS Configurator is for the radio link module, but the radio's operating system (EdgeTX) is updated via the USB port and EdgeTX Companion software. This is a simple process once you get the hang of it and ensures compatibility with the latest features .

Significance: The Pinnacle for Demanding Pilots

So, why is the TX16S MK3 MAX significant? It represents the culmination of the open-source RC movement. It offers pro-level features, an unparalleled level of customization, and future-proof connectivity, all at a price that is a fraction of what you'd pay for a comparable transmitter from a brand like Spektrum .

It’s the go-to choice for pilots who refuse to compromise on control feel, screen clarity, or link reliability. As one user put it, after switching to the MK3 with its AG02 gimbals, they’ll "never visit the Spektrum side of things anymore" .

Final Verdict: Who is it For?

The RadioMaster TX16S MK3 MAX is not for everyone. It’s big, it’s heavy, and its open-source nature means it demands a bit of learning .

But if you are a serious FPV pilot, a long-range explorer, or an RC enthusiast who wants the absolute best, this radio is a no-brainer. It builds on the trusted TX16S legacy, elevating the entire experience with phenomenal gimbals, a brilliant touchscreen, and a robust dual-band link . It’s a premium tool for those who demand excellence.

Pros:

Phenomenal AG02 Gimbals: The best on the market .

Gorgeous 5" Touchscreen: Makes navigation a pleasure .

Dual-Band ELRS: Unrivaled link reliability and flexibility .

Powerful STM32H7 Processor: Snappy and responsive EdgeTX performance .

Superb Build Quality: A premium, commanding feel .

Cons:

Large and Heavy: Not for those seeking a compact, portable radio .