How To Choose RC Transmitter For Quadcopter

Before building your quadcopter, Radio Transmitter (TX) should be one of the first items to buy. It can be confusing to RC beginners how to choose a suitable RC transmitter. In this article we will discuss the basics of a transmitter (RC Controller) and what you should look for when buying one: price, the number of channels, modes, frequency and other features.

The radio transmitter (TX) is a device that allows the pilots to control the aircraft wirelessly, the commands are received by a radio receiver (RX) which is connected to the flight controller.

Table of Content

Channels

The number of channels determines how many individual action on the aircraft can be controlled.

For example, channel 1 for throttle, channel 2 for yaw (rotating right and left), channel 3 for pitch (pitch or lean forward and backward), channel 4 for roll (roll or leaning left and right).

As you can see, four channels is the minimum number of channels needed to control a quadcopter (pitch, roll, throttle, yaw).

RC-transmitter-channels

If there are additional channels on a transmitter, they are normally used as AUX channels for switches and pots (potentiometer or knob). You can use them to change flight modes or trigger certain function/features on the multirotor.

In general it is recommended for transmitters to have at least 5 or 6 channels for a quadcopter. The extra 1 or 2 channels can be used to arm the quad and/or switch between different flight modes.

5-channel-transmitter-diagram

Transmitters with more channels (6+) are generally more expensive. They tend to have better build quality and are more functional than a basic 4 or 5 channel RC transmitter.

The stick control on a radios TX is called a gimbal. (don’t get confused with camera gimbal :D )

radio controller gimbal - transmitter RC

Modes

There are 4 different TX modes – mode 1, mode 2, mode 3 and mode 4. These are basically the different configuration of the 2 control sticks.

Mode one configuration has the elevator control on the left joystick and the throttle on the right one.

Mode two is the most common for quadcopter because the stick represents the movement of your quadcopter. It has the elevator control on the right joystick and the motor throttle on the left one. The right joystick self centres in the both axis, whereas the left joystick only self centres in yaw axis (left/right direction) and clicks or slides in the throttle (up/down) axis in order to allow constant throttle.

stickmodes

Mode three – same as Mode one except Aileron and Rudder are swapped.

Mode four – same as Mode two except Aileron and Rudder are swapped.

how to choose RC radio transmitter tx mode 3 4

Because of the identical gimbals configuration, in some TX, Mode 1 and Mode 3 are exchangeable, so as Mode 2 and Mode 4. This is achieved by swapping Aileron (roll) and Rudder (yaw) channels in user settings. If you don’t know which mode to use, just go for mode 2 since it’s the most popular.

Frequency Technology

Frequencies used in RC radio are 2.4GHz, 27MHz, 72MHz, 433MHz, 900MHz and 1.3GHz. Don’t worry about all these numbers, majority of us use 2.4GHz these days, unless you have specific needs for a different frequency.

Just in case you are interested here is some brief and interesting technical background.

For those of you who have been around the RC scene long enough, will remember 27MHz and 72MHz with the frequency/channel crystals (crystals were tuned to specific frequency channels to transmit the signal to the receiver which had its own same channel crystal essentially binding them together). This technology has been around for decades, they allow longer range and better signal penetration. However you could interfere with others using the same frequency (even different brands). Another problem was the large size of the antennas as they could reach a few feet in length. Crystals used for channel selection were also inconvenient as they broke easily and could constantly and annoyingly change when flying/driving with others.

2.4GHz system is a newer technology, and it’s currently the most popular frequency for small RC ground and air vehicles. It becomes the RC standard after new protocols were created that introduced frequency hopping technology which allowed the user to not have to worry about picking up frequencies or channels from other pilots. Antenna is smaller and easier to carry, but usually with shorter range than the 27/72Mhz.

You may have also heard of others using 1.3ghz, 900mhz or 433MHz equipment, these are more commonly used for long range or on larger crafts.

All the transmitter manufacturers switched to the new channel hopping protocols which made RC very easy to maintain and use. The software running is constantly scanning for the best frequency to use and if it detects any interference, automatically switches to another available channel. It is doing this many times per second so you never experience glitches or radio interference which was a big problem in the RC industry for many years. Another good thing about channel hopping is that you can fly with many other people at the same time without getting interference.

RC Transmitter and Receiver Paring

A transmitter usually comes with a receiver. Be aware that some brands of transmitters are only compatible with (or limited to) their own brand or model of receivers. That means when the receiver is broken you would normally have to get the same one.

This is not always the case though, as there are now lots of options that can be paired with other receivers that are using the same protocol (for example spektrum). So it’s important to know that not every TX would work with every RX, make sure you check and ask before purchasing.

Binding the transmitter to the receiver is very simple, and is only required to do so at the first time you setup a new receiver with the transmitter. Most decent TX will allow you to bind multiple receivers to the TX. You can even create separate model profiles for each aircraft so you can have different settings for each model. Check the instructions for binding procedures that comes with the receivers.

Once the TX and Rx are bound, the RX cannot be controlled by other TX.

What RC transmitter should I buy?

Budget and Channels

The price range is huge, from as cheap as $20 to well over $1000. The cheaper the radio, the lower quality it would be (housing, gimbals, switches etc)..

If you have a tight budget and not committed to the hobby, it would make sense to get a cheap 5 or 6 channel one, just to get a taste of flying, and later on upgrade to a better transmitter when you are more experience and know what to look for. It’s a good idea to have a backup transmitters anyway.

However if you are serious about quadcopters and someday want to do more advance stuff, like running GPS navigation, camera gimbals control etc, it’s better to get 8 channels or more.

Hardware and Features

There’s a lot to consider when it comes to choosing a good transmitter, such as the display screen (resolution, backlight etc), how the sticks feel (gimbals quality), multiple model memories and Training features (Buddy mode), and so on. Some may also like the expo and curve functions which allow you to change how the sticks react to your input by softening there feel at points you setup. (although this can also be done in the flight controller software, which is actually preferred by many pilots so you don’t reduce the sticks resolution and inputs on the radio)

Some RC transmitters support programming and firmware flashing to enhance user experience. You can personalize them with music and voice recordings or whatever you’d like. Do your research before spending good money on it.

Ergonomics

To be honest ergonomics is really a personal thing, no one can tell you which TX would feel perfect in your own hands. Factors like the weight of the TX, the location of the sticks and switches, how large your hands are, how long your fingers are, and so on all play a part in this.

I don’t think it’s a huge issue to worry about with the TX we suggested here. These companies are all brand names in the RC industry for years and they know how to make a good TX. If you can, go to a meetup and try a few. If you can’t that’s fine too. Speaking from experience, I think it’s just a matter of time getting used to a transmitter.

Telemetry Support

The longer I am flying quadcopters, the more I value Telemetry. It’s basically a feature that allows RX to send flight data back to the TX, such as battery voltage, current draw etc.

There are 2 ways Telemetry data can be obtained: 1. external sensors connected to receiver; 2. flight controller sends data to receiver.

External RF Module Capability

It allows you to install an external transmitter module on the TX, in order to transmit on a different frequency (such as 433MHz rather than 2.4Ghz), or use with other brands of RF systems/receivers. For example, the Taranis with Orange module can bind with Spektrum receivers.

Why invest in a good transmitter

A decent RC transmitter is a long term investment.

With programs available such as betaflight, we can setup the additional channels to tune the quads PID and rates during flight. This makes having a transmitter with additional AUX channels a big benefit. Having the ability to save multiple models is an added benefit of having a better radio as this allows one transmitter to be used for multiple crafts.

Another “should have” feature is direct connection between TX and computer via USB, which allows you to use the TX for flight simulators without any other additional hardware or mods. Training in FPV simulators allows you to get used to the feel of the sticks/controls and build up muscle memory. Some  cheap transmitters can also do this but requires a lot more tinkering and  additional hardware.

Choosing Receiver

It’s important to know that TX only works with radio receiver (aka RX) from the same manufacturer, most of the times. For example, if you get the Frsky Taranis, you will have to use Frsky RX’s.

But the choice of receiver might also be a consideration in choosing your TX, such as availabilty, size etc. For example, Frsky was made popular due to their receivers having compact form factor which makes them perfect for mini quad builds. There is also consideration to what receiver protocols are allowed and technologies used – Receiver RX Protocols and Technology.

Overview of some of the popular TX for FPV

TX Image Name Channels Price
Flysky FS-T6 6 $56
Spektrum DXe 6 $60
Turnigy Evolution 8 $68
Turnigy 9X 8 $73
Turnigy 9XR 8 $111
FrSky Taranis Q X7 16 $120
Spektrum DX6e 6 $180
FrSky Taranis X9D Plus 16 $205
TBS Tango 10 $250
FrSky Horus X12S 16 $500
Spektrum DX9 Black 9 $600

Recommedation on 8+ Channels RC Controller

When I started, I bought the Turnigy 9X. It’s affordable, and has a lot of room for DIY/Upgrade modifications! See my review about this Transmitter. But I later quickly sold it and bought an Taranis 9XD Plus instead as I needed more features.

The 9XR or 9XR-Pro is a step up from the 9X. It has similar functionality to other higher end transmitters but comes in the most basic forms to keep costs super low. It is programmable so you can modify it and flash various types of transmitter firmware on it, has the ability to load custom sounds, music to program to the switches and different functions. Since it also uses external modules you can use it with a couple of different protocols such as Frsky, Orange (dsmx/dsm2). There are many mods that can be done and there is a whole open source community surrounding it which gives its users endless options.

Back to the Taranis X9D I bought, it is so powerful for what it costs, making it one of the best value TX out there. It has swept the FPV industry to become one of the most popular transmitters.

Other options for higher end units are the Futaba T10/T18, Spektrum DX9/DX18, JR-XG11/XG14 among many others. See this comparison review of the DX6 and Taranis.

DIY RC Transmitter

I attempted to build an RC Transmitter myself although I haven’t tested it yet with a quadcopter.

Extra Reading

There are other tutorials you might find interesting.

Article was first created in October 2013, updated in June 2016.

77 thoughts on “How To Choose RC Transmitter For Quadcopter

  1. Tom

    Hi , I came accross your site as I was googling for building drones. I am gettign into building a hexcopter / quadcopter. what are the max range of these transmitters in miles? Is there a way i can conrll through my laptop ? what software would I need?

    Also, when i build a drone can I make it follow something automatically when making movies etc? and make it return to base when battery is low? how are those programmed?
    Can anyone guide me on these?

    Thanks
    Regards

    Reply
  2. Vladimir

    Hello!
    Nice work! It was very helpful for me, when I decide to buy my quadcopter. I want to buy with F3 flight controller. banggood.com/Realacc-X210-4mm-Frame-w-F3-6-DOF-Racerstar-BR2205-2600KV-Motor-RS30A-V2-Blheli_S-5X4X3-Prop-p-1078119.html
    But Taranis is much expensive for me. Can I use Radiolink AT9 for example? What do you think about that transmitter?

    Reply
  3. Carlos Atouguia

    Hello,

    i am looking for someone or a company that will be able to customise my transmitter. i want to put the throttle on a trigger button and not on the stick.

    does any one know of any company anyone that is able to do that?

    Reply
  4. Zeeshan

    HI,
    I am new into quadcopter world and your article was a blessing for me. i have built a basic quadcopter that lefts off 30cm from ground….i made an adnroid app for this……moving ahead for more, its getting difficult as i was using arduino with gryo+accelermeter……very frustrated and challenging…..i had decided not to use receiver etc and build from core.
    after 4 months trial, i was unable to make a perfect one and the cost on it was increasing day by day…..so no i decided to use receiver and transmitter….
    can u help me answer few questions:
    1. these receivers have built in gyro+accelerometer or we use external ones?
    2. how do i connect my ESC to it?
    3. do we need a flight controller as well?

    sorry for such basic questions….but these basic things are needed by my small brain

    Reply
    1. Weebly Reddit

      Your drone’s flight controller should have a gyro/accelerometer built in.

      Yes, heck yes.
      You need a flight controller/

      Reply
  5. David Frayne

    Hi I have a spektrum dx7 tx and RX will this work on the Eachine 250 racer I am well used to setting it up what are your thoughts
    Rob

    Reply
  6. Jonathan

    Hi Oscar

    Note that in the UK, and many other countries outside the US, 72MHz is illegal. The equivalent here, for aircraft only, is 35MHz.

    There’s also 40MHz, but this is only legal for land-based craft.

    Reply
    1. Oscar Post author

      good point guess i missed to mention that i will add a few words in the tutorial shortly! thank you Jonathan!

      Reply
  7. justin

    Hey oscar i have a turnigy 9x with er9x. i was wondering if you ever setup throttle curves to reduce sensitivity when the sticks are a mid point? maybe you could write an article regarding mixes that you use?

    Reply
    1. Oscar Post author

      I normally don’t setup curves on the TX, so I can have full resolution throughout the whole stick range… what you are asking is just rate which you can change in FC isnt it?

      Reply
    1. Oscar Post author

      lol sorry not much experience with Deviation TX, neither from my editor Justin and people flying mini quad around me…

      Reply
      1. Greg

        Deviation is a replacement firmware designed primarily for the Walkera Devo series RC Transmitters. While Deviation is heavily influenced both by the Walkera DEVO8 firmware as well as by the Flysky/Turnigy based ER9X firmware, it has been written completely from scratch to be easily portable and extensible.

        The supported transmitters are the DEVO 6/6S/7E/8/8S/10/12/12S/F7/F12E

        The Devo 7e is one of the most highly recommended entry level TXs out there. The Deviation firmware is actively maintained and developed, a new major version, 5.0.0, was just released. There’s also an awesome user base and support community at deviationtx.com to help out with any mods or issues.

  8. Raihan

    hey guys, please help me ….I Need a flying Quadcopter hand Controller Wiring diagram..
    <<<<<<<<<<<>>>>>>>>>

    Reply
  9. Riaan Theron

    Hi Oscar,

    I got a Syma Drone for free with no remote and manual can i use any 4CH 2.4G remote control for my Quadcopter.Please can you help

    Reply
    1. Robin

      Have a look into a Walkera Devo transmitter and flashing DeviationTX to it
      It’s an open source firmware and has been 100% solid for me and allows me to fly all my models
      (from toy quads to 250 fpv quad …and a fleet of helis… from toys to 450 size…and a plane and a buggy.. :D )

      Reply
  10. Abhinav

    Hi Oscar,
    I have a 4ch transmitter of 2.4GHz freq and i want to connect it my laptop for which dsc port should be present in the transmitter but there is no dsc port. What can be done? plz help.
    Regards.

    Reply
  11. Jonathan

    Hi Oscar,
    There are tons of transmitters out there, of which most are pretty useless when it comes to Multicopters or FPV.
    There is absolutely no need to get into the high end computer TX with big color screens e.t.c, as all you will ever need to do is have a couple of AUX switches for stuff like flight mode, GPS modes. maybe a camera slider, and a switch for adjustment of maybe PID’s, if your FC supports this. But most transmitters are going to be loaded with features that you wont ever use.
    Stick with a nice mid range 6 to 8 channel TX and as long as its capable of channel assignments and channel reversing, that’s all you are ever going to need.

    Reply
  12. luisen

    Hi Oscar

    after years of computer-flight-simming i am starting to get interested in the quadcopter “hype”, especially FPV seems like something i could enjoy very much.

    i bought and played around with the FPV freerider game to get a feel of quadcopter controls and i am loving it. but i am concerned about one thing:

    on a real R/C receiver device, can i have the PITCH/ROLL on the LEFT stick and the THROTTLE/YAW on the RIGHT stick? this is the only configuration i personally can fly properly with the FPV view and it feels completely natural to me. but now i see this completely different to both the 2 modes used in real life quadcopter flying.

    so i guess my question, can you easily switch YAW and ROLL on a MODE 2 receiver? or do i need to look out for a special one to buy?

    thanks!

    Reply
    1. Oscar Post author

      HI Luisen,

      I guess you mean you are more used to MODE 1 TX (Transmitter)?
      Most TX are available in both MODE 1 and 2, so that’s not a problem.
      It won’t affect your RX (receiver).

      Reply
    2. Kenneth

      Oscar,

      When you setup the receiver with your quad, you have to manually connect the receiver to the flight controller. You can simply plug them in whatever order or configuration you want. If you want the throttle on the right, you will swap the gimbals out on the transmitter for mode 1, then plug the channels into the flight controller to suit your needs! good luck!

      Kenneth

      Reply
  13. Aeromodelling

    Very glad to read your blog.Thank you for sharing this article.It is great! I will keep your article in my idea. Very happy reading.

    rcbazaar.com

    Reply
  14. Mike

    Hi Oskar!
    I have spent a lot of time reading your blog and it gave me a lot of tips. Thanks!
    I’m trying to figure out how RC transmitters work.
    1. RC transmitters are universal? meaning, a 2.4GHz RC transmitter can work with any 2.4Ghz receiver that I buy? if
    not, what characteristic other than the frequency should I check to be sure that they will work?

    2. Where can I find more information about the binding proccess between the transmitter and the reciever. What is the init sequence? How is it done? etc.

    Thanks a lot!
    Mike S.

    Reply
    1. Oscar Post author

      Hi Mike
      1. no… transmitter (TX) usually only work with RX of the same brand… or they should specify which one they are compatible in the product page. Quick google of the TX should also give you some options of what RX can go with it.
      2. binding process might be slightly different from TX to TX… i suggest consulting the manual.

      Reply
  15. Abhitosh

    hello

    can i control a quadcopter for laptop without any other transmitter…
    what program requaired to controle it

    Reply
  16. Fikri

    Hi, im a newbie at this. Can esc in quads be programmed in a way that only 1 side has throttle and no throttle at all on the other? this would cause the quad to flip i suppose?

    With that, is there a way we can program the controller to like trigger a switch when we want the quad to flip? Cause i was thinking of doing a waterproof quad. So initially it flies in the air normally with the 4 channel, and thn i set it to float on water. After that, i was thinking of maybe triggering a switch on the controller so that this time its just gonna flip and nothing else. After it flips, i would trigger the switch back to normal operation. Is that possible?

    Do help me out, thank you guys :)

    Reply
  17. Zenaida Bonifacio

    Very interesting info !Perfect just what I was looking for! Being rich is having money being wealthy is having time. by Margaret Bonnano.

    Reply
  18. Dario

    Hi Oscar,

    Im referring to the last part in your article about the Transmitter and its hacking.

    For a University project i plan to hack a transmitter and control my quadro with Data I generate in Arduino or Processing. have you come along with a transmitter that can be adjusted to to this?

    Although Im not super experienced, i imagine the flow of communication like this: my input -> RC transmitter -> rc reciver -> flight controller -> AC -> Motor.

    Can you help me some how?

    Best regards

    Reply
  19. rick

    i have a hobbyking 6ch transmitter….it works complicated. does annyone know how you set the right settings for quadcopter?

    Reply
  20. Esmyle

    sir
    i am using sunnysky X2208 1500kv motors and propellers 8×4.. what frame should i use?? recommend me cheaper one and suitable for my quadcopter.. and battery 1800mah 20c 14point smthng.V.. how about battery?? is good for my quadcopter?? openpilot,and transmitter flysky FS-T6.. please correct me if i am wrong anywhere.. and yes frame please

    Reply
  21. Christopher Boyd

    Hello Oscar
    I am reading through all your blog/posts that are so informative. Thank you for taking the time to share you hard won knowledge and skills.
    I have been dabbling in Quads for a few years and decided that I would be in it for the long haul, so……I bought a taranis X9D (Nov 2013). It is a very nice piece of equipment but very complicated for a novice user. I am now spending many hours to learn many basic things so I can actually use it for the first time. It has the potential to run in four “modes/configs” that allow you to use either, 8,12, 16 or 32 channels. It is enabled for telemetry as well.
    I will be connecting it up to the first “serious” copter- a Quanum Nova (aka Cheerson Cx-20), initially using an 8XR FrSky receiver. I think that using different “flight modes” (which I can assign to the various toggle switches) I will be able to use the limited 8 channels for the four motor controls, one for GPS, 2 for the camera gimbal (2 axis only), one for camera shutter. This equals Eight. I am not sure how the telemetry data gets back to the Transmitter. Any one help with that?
    If this is of interest to others I will post some more on it as I work my way through the maze.

    Reply
    1. Oscar Post author

      Can’t agree more Chris! The Taranis is an excellent product.
      I will write a guide on how to setup taranis telemetry in a week or two hopefully you can wait! :)

      Reply
      1. christopher Boyd

        Hello Again.
        I just got back to your blog through another circuitous route. I was searching for “understanding flight modes” and “understanding switches” so that I can set up the controller side of my quad on the taranis. I do not understand these adequately yet. Any advice where to find a good tutorial that will give me the fundamentals of what happens when switching flight modes, how switches are used for this. I am not clear if I use a witch will it reallocate one of the radio channels to another function allowing me to effectively increase my number of channels (…..but I still only have 8 receiver channels that are hard wired to the assets on the aircraft…?)
        Your somewhat confused pupil!

      2. Oscar Post author

        Please join our FB group, lots of people can offer advice there, link on top left of the website.

  22. King Kaiju

    Hey I just ordered a Syma X5C-1 (4-channel with a 4 channel remote), is there anyway I can upgrade the the transmitter/receiver? I also want to see if I can upgrade the battery life and flight distance. What do you think?

    Reply
    1. Robin

      Yep, certainly the TX benefits from a better one – if you google for Deviationtx if will give the lowdown
      I’m surprised Deviation doesn’t get more of a mention on here TBH, electronics tinkering galore :D

      Reply
    2. gerrypw

      I am sure you have moved on to other quads by now but the x5c is a good way to cut your teeth in this field of play. You can mode your TX for longer ranger which you might have discovered already. Have fun.

      Reply
  23. daristiz

    Hi oscar. I bought a 9xr radio But I’m confused about what transmitter and receiver should I Buy.
    Could you Give me an advise about this and Maybe give me some link? Thanks in advance.

    Greetings from South América

    Reply
    1. Hizzy

      hobbyking.com/hobbyking/store/__14349__FrSky_DJT_2_4Ghz_Combo_Pack_for_JR_w_Telemetry_Module_V8FR_II_RX.html

      This is the recommended module set up for 9XR.

      Reply
  24. firdaus

    Hi Oscar,
    I have Esky Belt CP V2 Heli which is 6Channel transmitter and receiver. Can i use it for Quadcopter? I plan to buy ARF kit Quad.

    Thanks!

    Reply
  25. Daniel C.

    Oscar please help me I have a ton of questions to many to ask just now. Text me please at 915-400-6422 ur blog helped so much I’m sure you can help even more.

    Reply
  26. Pakal

    “They are more expensive radios transmitter, but they do have nicer gimbals, maybe better resolution.”
    What is the function of a gimbal in a transmitter? And how many gimbals there are in a transmitter and where is it located inside the transmitter?
    Thanks for your reply.
    P_

    Reply
      1. Pakal

        I was actually thinking of the transmitter gimbals. And just when I hit the “post” button, I realized that those mysterious internal gimbals have actually been right in front of my eyes the whole time!
        Thanks for replying anyhow.
        P_

  27. alu

    Hi Oscar,
    Nice tut,

    How do you think about the idea that we use other (separated) telemetry using 433mGhz rf modul for other control like switch flying modes, gimbal control or camera ctrl?

    Thanks!

    Reply
  28. Matthis

    Hi, I chose the JR PROPO XG8 whith RG831B receiver and I’m building my own drone quadcopter . I would like to use the flight controller naze 32 but I saw on the net that it does not work with the DMSS modulation, is it true? is there any possibility to solve this problem? if there is no way, I will buy an other flight controller but It’s difficult to find informations about this so do you know any flight controller that i can use with my RC ?

    I am sorry for my english I think it is not really correct …

    have a nice day,
    Matthis

    Reply
  29. shushant

    Hello sir,
    I am a beginner. ….u also can’t say me a beginner because I am very keen about quadcopters I just love them. I am just 14 I saw a video on YouTube on how to make a quadcopter. I am confused about the RC transmitter.

    1) on the video it showed that u need a transmitter and reciever with 4ch……I live in india and there I found all other parts but I didn’t found the RC controller.pls help me with some indian sites selling 4ch transmitter
    2) I am getting a 6ch transmitter at a low cost so should I buy it as I am worried tht I won’t have a 4 ch reciever as shown in the video and it won’t work.

    Thank you
    Shushant

    Reply
  30. Ashade

    Would you recommend the newer 9xr instead of the 9x or would you directly go for the Taranis.

    Thank you in advance

    Reply
  31. Nitish

    Hello
    I am a beginer.Is FR SKY CT6-B 6ch is fine for a quadcopter.In future I want to upgrade my copter. For quadcopter with GPS navigation how many channels(minimum) required.

    Reply
    1. Oscar Post author

      Get 8 channel, you won’t regret it!
      4 for basic control, at least 2 for switch modes, 1 or 2 for gimbal control, or/and FPV cameras switch (recording camera & FPV camera)

      Reply
  32. prabhanjan

    Hi,

    i just had a basic doubt,I have a transreciever with 3 channels,but your blog seems to suggest that we have a minimum of 4 channels. Can I not send the data on same channel by multiplexing,which reduces the number of channel usage.Please enlighten me on this matter.

    Reply
  33. Jaran

    Hi,

    I’ve been away from RC for some years and thinking about getting back to flying.

    Can my many years old JR X3810 transmitter fly quadrotor? I’ve already upgraded my radio with a 2.4Ghz module (it’s frsky mudule). Which mode do I have to choose in the radio, heli or plane?

    Thank you so much.

    Reply
    1. Oscar

      as long as your transmitter has more than 4 channel then it should be fine.
      use heli mode, that’s what i am using on my Turnigy 9X.

      Reply
  34. Marco

    Hi there,
    as far as I know the Turnigy 9X can’t handle the fail safe: is that correct?
    It would be a very best buy but I really need the fail safe feature for my esa and, even more, for my “flying cameras”: how to solve?
    Any advice?
    Best regards, Marco

    Reply
      1. Ken

        One option is to use a flight controller with two way telemetry. That way you can trigger a RTL event if the RC transmitter or receiver fails.

        I purchased a Turnigy 9XR from HobbyKing for under $60 US without a transmitter module. It has open source firmware available and can be configured from an application on your PC. You can buy a transmitter/receiver module on 2.4GHz, 430MHz and several others to suit your frequency and distance needs.

        For the hacker (like those of us visiting Oscar at his Internet home here), OrangeRX makes a TX/RX module based on the Arduino that can be customized.

        The Turnigy 9XR, OrangeRX TX/RX on 430MHz, a FlySky TX/RX on 2.4GHz and programming hardware together cost less than the JR XG8 we bought my wife ($450 US at a local hobby store). The JR feels like a higher quality transmitter, but I like to tinker. :-)

        Oscar – Thanks for all your efforts with this site.

      2. Oscar

        Yes, very good point.
        One thing everyone should be aware of is, what frequency bands and signal power are allowed for personal use, before buying the equipment.
        Although it’s unlikely anyone would find out or even care, but it’s important we fly safely and do not affect other people.
        Some times i envy people living in the states, many frequencies are open to public.

  35. Jasveer

    Hi there, I need to purchase a transmitter/receiver but I just not sure where can i get it for a better or cheaper price. My goal is to be able to fly my x quadcopter for at least 10 to 12 minutes and we are also looking for one extra channel for the landing purpose. Can you suggest me a better place to purchase it. Thank you for your time. Best regards.

    Reply
    1. Oscar

      Hiya,

      try Hobbyking.com, they sell RC stuff at really low price. Another place to look for cheap transmitter would be ebay.
      remember it doesn’t has to be expensive, for quadcopter, 4 to 6 channels would be enough. But if you are thinking about long term investment, Turnigy 9X is a good one (9 channels, and lots of potential for modification).

      Reply
      1. Dj_Garfield

        Yep , Hobby King , right one : serious , listen to the customers , fast mailing , simply one of my favourite :)
        ( HobbyGaGa for the price too and banggood is multipurpose so I can joint Arduino orders with RC one )

        I like :
        “They are more expensive radios transmitter, but they do have nicer gimbals, maybe better resolution.”
        If you search in Futaba , or something equal, yes it’s expensive and would like to try , on day , If the difference justify the price ~|:
        => Thought last month …

        Today I can feel the difference between the HK-T6A-M1 , and Walkera DEVO12 , and the ration Price / Quality is sensable ( syntax ?? ) … ( HK-T6A-M1 :20.33€ / Walkera DEVO12E :148.99€ ), ok we have 6 channels more , but the stick linearity … The sweetness of the stick . All the type of “pilot” Mode : 1,2,3,4
        BUT
        the stickers and all serigraphy are for mode 2 , I fly in mode 3 :) Totaly reversed :) as My brain :)
        If you plan to test at the beginning the HK is quiet what’s we must have … when virus propagates … it’s another story :) ( where are my pills ?? )

      2. Oscar Post author

        thanks Garfield, yes most of the times we don’t have the chance to try every products, and many reviews on the internet isn’t always true. That’s why it’s good to meet people on the field, and try their gear :D

    2. suman hazra

      Hi there, I need to purchase a transmitter/receiver but I just not sure where can i get it for a better or cheaper price. My goal is to be able to fly my x quadcopter for at least 10 to 12 minutes and we are also looking for one extra channel for the landing purpose. Can you suggest me a better place to purchase it. Thank you for your time. Best regards.

      Reply

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I don't look at blog comments very often (maybe once or twice a week), so if you have any questions related to multirotor please post it on this forum IntoFPV.com... You're likely to get a response from me faster on there.