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Jan 25, 2018, 10:32 PM
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Review: Akk fx2, x2 and x2p cheap smartaudio vtx


Original link:https://oscarliang.com/akk-vtx-fx2-x2-x2p/In this review we will take a look at some new video transmitters from AKK, which are affordable VTXs that come with SmartAudio.

If you dont know what SmartAudio is, its basically a feature that allows your to change your VTX settings in Betaflight OSD or even from your Taranis Screen using LUA scripts.

Here is a tutorial how to set up VTX Control.

Different Form Factors and Connectors
AKK has already released several VTXs of different form factors and antenna connectors. The ones that support SmartAudio at the moment are the X2, X2P and FX2. Thats pretty cool as you can choose whichever works for your particular build.

Update (Nov 2017) AKK recently released a new VTX called the FX3, its similar to the FX2 but has a smaller profile that uses 20x20mm mounting pattern, in the cost of lower max output power, which seems to be designed for smaller micro builds.

AKK FX2 VTX
You can find this product at:

AKK Official Product Page
Amazon
It comes with the VTX, a 10cm RP-SMA to MMCX pigtail, power/signal cable, manual and some stickers.

The Specification is:

Supports SmartAudio
Switchable output power: 25mW, 200mW, 500mW and 800mW
5.8Ghz, 48 channels
Input Voltage: 7V 24V
Built-in BEC [email protected]
Supports PitMode
Built-in Mic
Weight: 7.9g or 12.5g with RP-SMA pigtail
Size: 36mm x 36mm x 5mm (WLH)
One cool feature about this VTX is that you can mount it on top of your FC/PDB stack thanks to the 30x30mm mounting pattern.

The FX2 comes with MMCX antenna connector, and a pigtail extension lead with RP-SMA connector.

I am happy to see AKK is using MMCX connectors on their VTX, as people are having so much trouble with U.FL connectors on the Unify Pro and the Tramp VTXs. MMCX has more mating cycles and is more robust.

But I wish they could provide users the option to choose between RP-SMA and SMA for the pigtail, at the moment it comes with RP-SMA by default.

I like the design of the FX2 VTX a lot.

In case you cant use SmartAudio to change VTX settings, you can still do so with the push button on the VTX.

It has an easy to read LED display so you know exactly what output power, which channel and band you are on.
AKK X2 VTX
You can find this product at:

AKK Official Product Page
Amazon
It comes with the VTX, power/signal cable, manual and some stickers. The Spec is very similar to the FX2, except the smaller size.

Supports SmartAudio
Switchable output power: 25mW, 200mW, 500mW and 800mW
5.8Ghz, 48 channels
Input Voltage: 7V 24V
Built-in BEC [email protected]
Supports PitMode
Built-in Mic
Weight: 7.3g
Dimension (PCB): 30mm x 20mm x 8mm (LWH)
SMA antenna connector (you can choose MMCX connector)
Again it has the same push button and single-digit LED display we saw on the FX2.


Not much to say about the X2P, because its exactly like the X2, except its using a SMA pigtail, which I believe thats what the letter P means in the name.

The pigtail has a SMA antenna connector.
The pigtail is about 6cm long.

Audio not working

Although all of these VTXs have built-in Microphones, none of them seems to work in my testing and only static noise was recorded. Not sure if these are just faulty mic I have or Ive done something wrong, I will come back and update once I hear from AKK.

Setting up SmartAudio
I can confirm SmartAudio is working as expected, on both Betaflight OSD and LUA script. Here is how to set up VTX Control.
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