Radiomaster GX12 with ELRS Gemini: a review

Radiomaster GX12

The GX12 is a compact EdgeTX radio from Radiomaster with a number of interesting features. 

The RF module supports ELRS Gemini Xrossband/GemX which suggests that it’s targeted primarily at the drone/video market. That being the case, I was initially sceptical about its application for sailplanes and electric gliders (my area of interest).

However the GX12 also supports the Ranger transmission modes which makes it compatible with PWM receivers like the Radiomaster ER6G, Matek 24R P6V etc., and these are popular with fixed wing line-of-sight pilots. The GX12 also has some innovations of general interest. 

With my scepticism diminished, here is my review. I hope you enjoy reading it!

Time for a refresh: Mike's OpenTX/EdgeTX Clinic

Hard to believe that ten years have passed since I created the original OpenTX Clinic website! 

At the time, FrSky had just launched the Taranis X9D, revealing OpenTX to a wide audience. Since then the website has expanded with tutorials, templates, Lua scripts and code snippets.

An introduction to ELRS - plus how to deal with Channel 5

ELRS is a bit of a sleeper - it's been around for a while, but if you're  a fixed wing/LOS (line of site) flyer, then you may not have heard of it. You soon will though, especially if you use EdgeTX or OpenTX. 

ELRS is a long range RF protocol originally conceived for use with drones. However, thanks to receivers like the RadioMaster ER series, ELRS is now a great option for line-of-sight flying - including F5X and F3X sailplanes. 

So what exactly is ELRS, and what do you need to get started?  Read on, while I take you on a tour! 

RadioMaster Pocket: a fine little EdgeTX / ELRS / MPM transmitter!

What's this dinky transmitter on my desk? It's the Pocket - the smallest in a series of compact transmitters from RadioMaster. It comes with a choice of modules (ELRS or CC2500 MPM) and is very keenly priced. Oh, and it's stored in a little pouch!

Spoiler alert: the Pocket may cost ~£65, yet is more than a match for £1000+ radios. I know because I've flown an F3F model with it, with all the mixer bells and whistles. Crazy times!

Read on and find out if the Pocket is for you...

Review of RadioMaster ER6G, ER6GV, ER8G and ER8GV receivers for ELRS

RadioMaster have just released a bunch of ELRS receivers specially for gliders and electric models.  These  are notable for being some of the first ELRS receivers to have servo connectors integrated on the main board. 

I've been having fun evaluating these receivers, including flight testing them in DLG and F3F models. In this review, you'll find detailed descriptions, with example configurations, best practice, and tips for ALT telemetry. 

Let's take a closer look! 

RadioMaster Zorro review: pushing the boundaries

RadioMaster have a new baby transmitter. Yes, it's the Zorro! You'll probably already know that it's packed with features, supports OpenTX and EdgeTX, and comes with a choice of Multiprotocol or ELRS modules.

However while most of the Zorro reviews focus on its use with drones, this review takes a different approach - it's geared towards pilots of sailplanes, DLG and electric gliders. If that sounds like you, then read on!  

Supertrim - a better interface for trimming crow brakes

In this article, I describe an improved user interface for trimming out crow brakes. It uses the standard features of OpenTX - no Lua script is required.