Review: Matek HV VTX – Video Transmitter

by Oscar
Published: Last Updated on

The Matek HV VTX has been out for months, I’ve always wanted to give it a try because of the tempting spec, features and price. Finally we got one in for a review!

Purchase: http://bit.ly/2voTI5B

Unboxing

The Matek HV video transmitter comes with nothing but the VTX itself and a MMCX to SMA pigtail.

Further Reading: How to choose VTX for Racing Drone?

What’s Special about the Matek HV Video Transmitter?

This is a very impressive VTX, it’s got almost all the features I want on a VTX, and it’s cheaper than the Tramp HV and the Unify Pro HV at only $30.

  • High voltage input up to 6S
  • Supports VTX Control
  • Using robust MMCX antenna connector

The Matek HV VTX has a rectangular shape and two M3 screws holes that are 30.5mm apart, this allows you to stack it on top of your flight controller.

However in terms of size it’s not as compact as the Tramp or Unify Pro. Therefore if you have a tight build or low profile frame, you might not be able to take advantage of the “stackable” feature, even have trouble fitting the VTX in the quad.

Spec

  • Input Voltage: 7V – 27V (2S to 6S)
  • 5 bands, 40 channels
  • Switchable Power: 25W, 200W, 500W
  • Supports VTX Control (Tramp Telemetry – BFCMS)
  • BEC: 5V, 1A
  • Dimension: 18mm x 36mm (half of an FC)
  • Weight: 10.5g (VTX + SMA extension wire)

Closer Look at the Matek HV VTX

To change settings, most people would use Betaflight OSD or Taranis LUA script via Tramp Telemetry. But I am glad to see there are two physical push buttons (A and B) for changing settings just as a back up method.

The excellent LED indicators for channel, band and power are another nice touch! Very easy to understand than single digit LED display.

The Matek HV VTX uses solder pads rather than the common plastic JST connector, so you can directly solder wires on the VTX, but I wish they’ve included some silicone wires!

The MMCX to SMA connector pigtail is 70mm long, and it weighs 4.6g alone. The VTX alone weighs 5.9g.

The on-board BEC is a handy feature, the 500mA current rating is enough to power your FPV camera as well as your flight controller if required.

There is no built-in microphone, but if you want audio during FPV, you will have to get an external mic or use an FPV camera with built-in mic.

The Matek HV VTX can be mounted directly on top of the FC like so, and you can probably use shorter standoffs to achieve a lower stack than what I am showing you here.

Beware that not all frames are going to fit an extra board in the FC stack, especially if you are already planning to use a PDB or 4in1 ESC in the quadcopter.

I will be testing this VTX on a new build in the coming weeks, and I will update this post if I have any issues or findings in the future.

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17 comments

Jon 14th October 2019 - 8:05 pm

You say “The on-board BEC is a handy feature, the 500mA current rating”
Yet the spec says BEC 5V 1A, which is correct please?

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Oscar 15th October 2019 - 5:31 pm

They’ve probably made the change after my review.

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Michel Vasconcellos 27th May 2019 - 4:33 am

Hi! When i try to switch to either 200 or 500mw, both the 200 and 500 LED light up, so it is unclear if it is transmitting on either of the higher powers. I’m using the buttons, not smart audio. Anyone else experiencing this?

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Oscar 30th May 2019 - 5:06 pm

Do you have Smart Audio setup? Check there to confirm perhaps?

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Craig Oakley 10th April 2019 - 1:08 pm

Run this VTX for a while and only 3 issues found. None of them deal breakers for regular use.

1) The MMCX connector has a weak grip on the aerial and can pop off more easily than other units. Easy to solder a replacement MMCX connection.

2) I’ve had a couple units lose the A of B buttons (no issue if always using tramp for channel switching).

3) If you lose the ground connection for any reason and the HV wire is still connected, the unit will source ground through TX4 if connected (which will usually fry the attached FC)>

Overall it is great VTX.

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Martin 16th March 2019 - 1:10 pm

Can this VTX run without antenna like the TBS unify?

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Giorgio 16th February 2019 - 8:40 pm

Hi, could you help me maybe it is simple but I’m not able to find nowhere where to connect mic output from runcam. Thanks

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Oscar 25th February 2019 - 4:39 pm

Connect the Mic output to the pin “AUD” on the VTX.

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Randy 11th August 2018 - 12:01 am

How can I check what firmware version my Matek Vtx is running??

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Lorenzo Ferro Forte 30th April 2018 - 8:07 pm

Is it possible to connect directly the audio cable from the camera to the vtx?

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Oscar 9th May 2018 - 11:58 am

yes

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Renato 11th April 2018 - 12:00 am

have you tried to update the firmware of this vTx using the BetaFlight passthrough method? I’ve tried without success :(

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Matthew Jamrog 7th April 2018 - 1:49 pm

Please help. No instructions on how to connect mic input from roto riot camera. Can’t find help anywhere. How do I connect the white audio wire from the camera to the trx?

Thank you for your help,

Matthew

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jason 2nd May 2018 - 2:09 pm

I like to know how to connect a mic to the vtx as well.

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leeph 13th February 2019 - 10:27 am

What are you finding so difficult? Mic is one wire (assuming ground is already connected). You solder a wire from the mic output on camera to the audio input on the vtx… there’s nothing more complicated about it than that.

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MLFPV 31st January 2018 - 5:36 pm

When you have articles that end like this one is it possible to re-post them at the top of the article list? You have any articles like this that I would love to hear your hands on feedback, but I forget to check back and only new articles show up in my RSS feed.

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Oscar 5th February 2018 - 2:16 pm

Yes whenever I have major updates on an article I always move them to the top of “latest posts”. thanks for checking :)

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