Review: Eachine TX805 Video Transmitter – Best Value VTX in 2019?

by Oscar
Published: Last Updated on

If you fly alone or in small groups, then there is absolutely no point spending so much money on VTX’s with fancy names. I recently tested the Eachine TX805, and I think it’s one of the best value VTX’s you can get in 2019.

Buyer’s Guide: How to choose VTX for mini quad?

Where to Buy?

Update (30 Mar 2019): it’s currently on sale, price dropped from $17 to $12.59 (from the China warehouse only). If you are getting it from the US warehouse, use this coupon for $3.5 off, d65ba4)

Features and Specs

The TS805’s got everything you need in a VTX!

  • Built-in microphone for audio (you can listen to motor noise)
  • SmartAudio for VTX control
  • User-friendly LED panels and push button
  • 25mW, 200mW, 600mW and 800mW selectable output power (BUT really it doesn’t do 800mW, see my testing below)
  • Solder pads – no stupid connector
  • Can be mounted in FC stack (30.5mm)
  • MMCX connector!
  • Supports Pitmode

Specification:

  • Input Voltage: 7V to 24V (2S to 5S)
  • 40 channels, 5 bands (ABEFR)
  • 5V output for FPV camera
  • Dimension: 36mm x 22mm x 5mm
  • Weight: 8.1g with wires

It comes with a manual, a dipole antenna with MMCX connector, and a MMCX to SMA pigtail (or RP-SMA, according to your choice).

The antenna is about 7cm long, while the MMCX to SMA adapter is about 10cm long.

Closer Look at the Eachine TX805 VTX

The Eachine TX805 VTX already comes with wires harness soldered on. These are 30AWG wires and about 7cm long, I love the solder pads, makes it really easy to repair and build.

Build quality of the Eachine TS805 video transmitter is reasonably good. There are a few capacitors and a big inductor onboard for power filtering that help clean up noisy FPV video feed.

Another feature that I really like is that it can be mounted on top of the FC (30.5mm mounting pattern).

And finally, someone at Eachine knows how to design a user-friendly LED interface. It’s nothing sophisticated, they just use different groups of LED’s to indicate channel, band and power. Very straight-forward and easy to understand. One push button for selecting and switching between these settings.

Here is the manual explaining how it works.

There is a small bug though.

When you enter band or power mode, it won’t come out of it. Normally you would expect it to come back to channel mode after leaving it for a few seconds. But it will just stay in band or power mode until you restart the VTX (power cycle).

Output Power Testing

When it comes to power output, I am super excited that the TX805 did extremely well in the 25mW and 200mW testing. These are the power levels I mostly use personally.

However it only gave half of the specified power on 600mW and 800mW. Maybe they labelled it wrong, should have been 300mW and 400mW :)

Power R1 R2 R3 R4 R5 R6 R7 R8
25mW 30.6 30.2 30.5 26.5 27.1 27.6 26.1 23.4
200mW 220 212 209 208 212 214 201 185
600mW 361 / 356 / 311 / 268 /
800mW 375 / 384 / 351 / 294 /

I really don’t think that’s a deal breaker anyway. 200mW is really all you need on a mini quad for flying around. Using this FPV range calculator, you can see 200mW VTX can easily provide 1Km to 2Km of range with the help of a good directional antenna. This should out-range most of our 2.4GHz radio links!

To use higher power, like 600mW, you really should use heatsink to keep the VTX cool, otherwise output power is just going to drop due to overheat. That’s why I don’t recommend running high power on 5.8GHz VTX on a mini quad! If you are really going for long range, you should look at lower frequency like 1.3GHz.

If you really want a high power 5.8GHz VTX, the AKK ultimate VTX is by far the most powerful VTX I have tested, and it actually delivers what it claims to do!

So do I still recommend the Eachine TS805? YES! A great VTX for budget builds!

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21 comments

Albin 6th December 2020 - 11:12 am

Hi. I have this vtx, and I can’t quit from pit mode. I can change channel and band, by OSD or button, when I change power i see leds also change, but it have no power. It works on distance less than 1m. Do you have any advice for me?

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Paul 8th July 2020 - 10:25 am

Hi, complete newbie to this here – Where would I find a suitable battery for this transmitter? I’m not sure what these different connectors are so don’t know how to find one that suits! (My son wants to mount this on various RC toys – planes, cars, so I want to help him). Thanks.

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Robbin van Hoek 25th November 2019 - 1:30 pm

Hi, I use this VTX and i think its pretty nice, however, the audio is terrible, even without the quad armed i get terrible noise on the audio. I’m using a ROTG02 video receiver on my phone. The Vtx is powered from a 8v voltage regulator on my quad. Is there any way to solve my problem?

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Ivan 2nd November 2019 - 6:34 pm

I would ask for your help.
I ordered a TX 805 5.8Ghz. for a drone under construction (peon 230). Which remote control do you recommend without being expensive ?. I wish the distance was at least 500 meters. Thanks a lot for the quick reply.
Ivan

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chupo_cro 1st October 2019 - 1:00 am

Pity TX805 can’t be powered off by using the button or a switch and it is even not possible to activate the pit mode using the button. It would be useful when flying LOS.

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Robbuz 10th September 2019 - 4:03 pm

Having the same experience as Bonobox. I hear nothing but static from the microphone. Is there something we are missing?

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Oscar 10th September 2019 - 6:49 pm

Maybe a faulty unit with bad mic?

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Lorenzo Ferro Forte 4th September 2019 - 8:09 am

My FC only delivers 5v output on cam pads, can I connect this vtx directly on the Lipo pad?

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Oscar 10th September 2019 - 6:29 pm

4S? If so, yes. But make sure you use capacitor at the power pads to reduce voltage spikes.

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SilbernerSurfer 19th June 2019 - 9:13 pm

Where to get such a device to test output power?

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Oscar 27th June 2019 - 5:46 pm

Google, “ImmersionRC power meter V2 oscarliang”

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NPK 24th May 2019 - 12:19 pm

Hi Oscar,

Thanks for the review. Do you by any chance know how this compares to the TX806? Also, which VTX would be your choice for a first budget build?

Cheers.

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Oscar 26th May 2019 - 2:46 pm

The TX806 is in such a weird shape, I prefer the 805.

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Thierry 17th May 2019 - 11:01 pm

Hi,
Does Smartaudio actually work? I’ve had a bad experience with previous eachine so called smartaudio VTXs
Thanks !

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Oscar 23rd May 2019 - 6:35 pm

yes, it works.

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AE 16th April 2019 - 2:32 pm

this looks very similar to the RDQ Mach 3. Anyone know if the Mach 3 is actually just a rebranded TX805?

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John Daniels 4th April 2019 - 4:25 pm

Maybe your powering from a noisy source try another way the sound is far from perfect when Motors are running but you can here them

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bint 4th April 2019 - 10:49 am

hey oscar, what input power did u use?
it only delivers 800mw @ 12v and higher if you look at their specs

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Oscar 4th April 2019 - 12:14 pm

Yes I was powering the VTX with 12V.

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Bonobox 31st March 2019 - 6:33 pm

Hi, I’ve the same vtx and fxt viper goggles and I don’t hear anything other than white noise….do I need to activate something to get the audio?

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XSJFYZS 31st March 2019 - 5:23 pm

EWRF E708TM3 PRO:???

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