Hello friends since i am a newbie here i have very silly questions regarding the purchase of a tx for my drone ,i am about to buy a avionics rcb os 10 transmitter from a guy , that tx is is as new as he bought , he said that he didnt used it for a year,i believe in his words ,but my concern is can i buy that tx

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This is the one

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I'd suggest buying a Flysky or Frsky transmitter. Avionic after sales parts are hard to find.
Even Turnigy is good if you can spend some extra bucks.

For a beginner, it's better to get the Flysky.

I own flysky , flysky is the worst. Buy Fr Sky as @Aravind has said.( In my experience Avionic RCs are quite lasting as I have one since 2013. But receivers, toggle switches etc are hard to find elsewhere).

Avionic is pretty much the worst radio in the market.

Get a flysky. People that say otherwise don't know what they're talking about

Of course if your budget is 10-14k then get a frksy qx7, or if it's within budget then get the x9d+

Dude for a beginner Avionic is pretty much it.
You only get the flysky problem when you try APM etc with it. My 9 ch FS has only one way to use the flight modes. The knob. All switches else doesn't work in flight modes. I have used Avionic for a quite long time but it's not the "worst radio" on the market considering its price.

Just because you don't know how to use a radio doesn't mean it's not good. Flysky is popular for a reason, most fpv pilots on a budget get a flysky. I know many people that use a Flysky for fpv racing, for AP builds etc.

Avionic is bad quality, period. Not much support either.

Thanks for every one suggestion i am getting this tx for 4.5k and no one will give frsky 9ch for that price so my Choices would be fsi6 or this one

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Get this one. RCBazaar provides good support. It's pretty good quality as well.

I used to have Avionics RCB6i. Not impressed at all. Even the Gimbal stopped working after after a while. Currently I use FlySky. Enough for a beginner.

@Rishabhbarma I also have an rcb6i that's my first radio , I didn't say Avionic is the best radio , yes it has its problems but it's way better than the shitty stock flysky firmware. Flysky firmware kills my ears. And, Fr Sky is way better than the turnigy/flysky counterparts. Both Turnigy and Flysky are manufactured by Flysky , it's that branded for HK.
1) Who told you I don't know how to use a radio. Learn to respect the other person's opinion even if they are wrong.
2)Just because everyone uses it doesn't mean it's good.
I wasted my money on Flysky TH 9X It's controls are pretty good , I'm talking overall. I didn't say anything about FPV , If you are too sure on the flight modes of APM in TH 9x other than the channel I told ie, the knob. Show us.

I have had both, the Flysky i6 and the RCB 6i
I have had two crashes thanks to the RCB6i. It has a mind of it's own. The gimbals are useless and you are limited in programming. It's a bulky radio and the receiver antenna is easy to break. You don't get switch programming and no potentiometers. All switches.

While the Flysky i6 is Cheaper and better. It has enough features to keep you satisfied throughout your hobby. You may choose to upgrade to a frsky 8-9 years down the line. The flysky has got everything you  expect from a radio costing twice the price! Mine has been wonderful since I got it. A year and half has passed. The RCB 6i is gathering dust since last year. I did once take it out owing to nostalgia. You can convert it to 10 channels, add extra switches and customised transmitter modules just by doing a little soldering and following YouTube videos. You can even add frsky modules.
The reason I did not sell my avionic was because it may cause losses to whoever I sell it to!

The Rcb10 is just like the RCB 6i just upgraded to 10 channels.

By all means get the flysky i6!

@ AL HAM SHARI
Who told you that flysky is branded for HK?
Flysky is an OEM manufacturer. About 15 different companies rebrand their products. Please check before you say.
Well, Flysky is a million times better than Avionic. That everyone will agree to. There is a reason behind that huge demand. There is a reason behind companies rebranding flysky.
The thing is flysky can be easily modded which is additionally a great feature. You can add extra buttons and switches and also program them. Did you know that the i6 can be converted to 10 channels simply by tweaking a little bit of code?
@  Asfakmhmd
Blindly go for flysky! It is better in all aspects!

@prabal The Turnigy 9x is the same  flysky TH-9x , I'm talking about the 9 ch one not the one you are talking about the 6 channel one may be good. But the 9 ch one ,is a waste of money dude. It can be modded though , that I agree. I'm not an Avionic fan , but the stock Avionic firmware is much better than the TH 9x firmware.

Update: The flysky TH 9X is to blame. I haven't really used other models. So, Don't buy TH 9X.