FX796T Video Transmitter VTX – 5.8GHz 40CH

by Oscar
Published: Last Updated on

Not really a review, just wanted to show you my new FX796T 40 channels Raceband VTX.

It looks extremely like my previously reviewed ATAS 40ch Raceband VTX, only difference is the location of the antenna connector.

FX796T-5.8ghz-40-chvideo-transmitter-vtx-mini-quad-top

Again it has the push button for changing frequencies and channels, and the LEDs indicates what channel you are on, which makes it extremely easy to do at the field. No more dip switches charts and tiny pins!

This VTX is small and fits in mini quad pretty well. It comes in a nice box with a cable, antenna and a manual.

FX796T-5.8ghz-40-chvideo-transmitter-vtx-mini-quad-package

The FX796T video transmitters exist in two power levels, you can find them fairly cheap these vendors, both provides free world wide shipping.

FX796T 200mW

FPVModel ($33.4) | Banggood ($32)

FX796T 600mW

Banggood ($42)

I personally would recommend the 200mW version for those who frequently fly with other people. Lower power would reduce the chances of video interference to other people’s video.

If you usually just fly on your own, and like to go around obstacles, 600mW would be your choice, which I am showing in this post.

There is really not much point getting 8ch  or even 32ch VTX any more, unless you can find them much cheaper. having an extra frequency band (Raceband) would help so much in group races, and also more future proof.

Here is the manual in case someone needs it.

FX796T-5.8ghz-40-chvideo-transmitter-vtx-mini-quad-manual2 FX796T-5.8ghz-40-chvideo-transmitter-vtx-mini-quad-manual-1

There are concern how to mount this VTX in a mini quad, as the antenna connector is in a awkward position. I think it really depends, in my case I am using a right angle cable extension lead and it works for me perfectly.

FX796T-VTX-angled-antenna-connector-mounting

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17 comments

Peter Muster 14th May 2017 - 12:10 am

Does anyone know where to find spare FX799T VTX harness/cables?

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Jaspreet 19th July 2016 - 2:57 am

Hi Oscar my push button on this vtx has failed would you know if anyway to fix this issue? Please let me know if possible

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David DePuy 11th July 2016 - 3:17 am

I hooked this one up today and I’m not getting any signal out. My video receiver shows the exact frequency on the display. I did have a lock on a black screen for about 10 seconds, but everything after that has been fuzzy.

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Oscar 13th July 2016 - 11:58 am

1. try to go through all the channels on the VTX
2. if still nothing, go through all channels on the VRX
3. if still nothing, try a different VTX, repeat step 1

if step 3 works, then it’s your first VTX damaged. if step 3 doesn’t work, then it might be your VRX.

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ruizw9 19th April 2016 - 11:32 pm

Hi Oscar,
I just purchased this vtx, I need to splice it to connect to my tbs powercube. I notice it has a mic built in, but i dont see an audio out lead, i’m a newbie so not sure if its supposed to have audio out main reason i’m asking is because the powercube cable i’m splicing it with has audio (white) cable, anyways thanks in advance

V/R
SSG Ruiz

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Darryn 2nd January 2016 - 2:43 pm

Hi Oscar,

How do you guys physically mount this VTX to the frame?
I like the way the Oscar has shown it in his pic above.
What do you actually use to mount the VTX to the frame: double sided tape? It seems that the heatsink gets pretty hot just testing on the bench.

TIA

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Oscar 6th January 2016 - 12:51 pm

I secure mine with zip tie… just a little double sided tape so it doesn’t move around :)
the heat is fine, it shouldn’t be a problem when you are flying air will cool it down.

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sevet 21st December 2015 - 1:13 pm

At first that T/L shape sma seemed great for mounting directly through the frame but they should have made the sma a bit higher for that as the connector touches the frame and doesn’t let it sit straight.
Also you would then need a hole for the channel button and the hole to view the status of the leds…..

After a crash my sma connector bent with the board itself, still works and now its easier to mount through the frame with a bit of foam to protect the board, the switch itself went MIA and now it needs a small screw to press it.

If you have to use a pig tail on the sma its better to go with the straight sma connector and not the L shape to keep the build flatter.

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Peter Provost 12th December 2015 - 12:07 am

Hi Oscar,

A few comments:

1. I love the pushbutton, but you may need to cut away any heatshrink that could accidentally press it in a crash. Also, I’ve taken to positioning the transmitter (typically with a pigtail) to make it easier for me to access it at the race field.

2. The locking connector is great, until you realize it is almost impossible to source a replacement. I’ve contacted a couple of places that sell the FX799T (different antenna connector position) but no joy. If you or anyone else find a source for that connector, please share! I’ve been considering desoldering the original connector and replacing it with something I can easily get cabling for, but haven’t needed to yet.

3. You see that tiny little SMD resistor on the bottom right next to the locking plug? Right below it are a pair of soldering pads. If you move that resistor down to the lower set of pads it will bypass the internal 5V regulator and pass the input voltage out to your camera. Very nice if you want to send 12V to your camera instead of 5V.

Enjoy!

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Oscar 14th December 2015 - 4:41 pm

thank you Peter, that’s some great info there :)

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Chris M 24th December 2015 - 6:07 pm

Good points Peter. I actually found this post while searching for a replacement connector for this vtx haha. So far no luck, so if anyone knows a source, please share!

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Chris M 24th December 2015 - 6:36 pm

Edit: I think I found it…..

readymaderc.com/store/index.php?main_page=product_info&cPath=11_66_67&products_id=4702

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Zach 12th February 2016 - 5:58 am

Hey Peter!

I got in contact with RMRC and they told me the FX799T uses JST-GH connectors.

digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=189774919&uq=635908252093899472

digikey.com/product-detail/en/GHR-05V-S/455-1595-ND/807817

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Cyril 10th December 2015 - 2:55 pm

Hi Oscar,

As the button to select the channels is on the antenna side, it is not so cool that we can expect…
In fact, most of time, the button will be stucked under the frame…

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lukim 10th December 2015 - 5:00 pm

Hi Cyril,
yes, while I love the concept of push button, I hate the one on my FX799T. Its difficult to locate and press when installed and doesnt provide tactical feedback. It also seems to switch channels in a crash, just by the pressure of the heatshrink it comes covered in. Very bad for races/flying in group.
No issues on my Lumenier (which is just a rebrand of these). I guess they use other heatshrink or even leave out the button. So before install, check your button and cut it out oder reshrink the whole unit if necessary.

Also antenna mount on Oscars TX is very bad. How am I supposed to fit this into a 150-180 sized frame when a pigtail is connected? Guess its designed to be mounted underneath the top plate and secured by antenna on top, which will kill the VTx (or at least the SMA) sooner or later. You will also cover the button (depending of top plate structure) by doing so. I call bad design. Sorry Oscar, no offense ;-)

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Oscar 14th December 2015 - 4:36 pm

none taken :) depends on how you use it really :) they designed it this way for a purpose :) there is another version that has straight antenna connector i think :)

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Oscar 14th December 2015 - 4:35 pm

yes it can be a bit awkward :) but if you use an antenna extension cable it would be fine :)

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