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Author Topic: Modifying the FlySky FS-i6  (Read 461 times)

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Offline atomiclama

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Modifying the FlySky FS-i6
« on: April 10, 2017, 12:48:42 »
I love this TX but one thing has been bothering me for some time.

When I hold the TX both the internal antennas are aligned on the horizontal. Where as the ant on my quad are vertical.

I have been noticing recently that going behind trees bushes I seem to be getting dropped packets from the TX, well it feels as if the quad momentarily stops responding to the sticks. Its only a little but is a bit disconcerting.

So I thought I'd try the external antenna mod so that I can get it vertical. Oh Err missus . ::)

Well here goes.

Using one of these pigtails
http://www.banggood.com/10cm-PCI-UFL-IPX-to-RPSMA-Female-Jack-Pigtail-Cable-p-924933.html

and one of these antennas

http://www.banggood.com/Wholesale-FrSky-2_4G-V8-Series-5dB-Module-Antenna-RP-SMA-p-68703.html

Well I will do when it turns up, until then it's just an antenna from a WiFi access point I had lying around.

Internal shot showing the antennas.

23087-0

Not very careful with the bench drill and took one of the wires out. :embarrassed

23089-1

New pigtail installed.

23091-2

All done not bad for a lunch time hack.

23093-3

Now to see if I can notice any difference.




 


Wasdale X, Ow that hurt

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Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #1 on: April 10, 2017, 12:52:04 »
 :embarrassed Now with pictures  ::)
Wasdale X, Ow that hurt

Offline LuMan

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Re: Modifying the FlySky FS-i6
« Reply #2 on: April 10, 2017, 14:24:33 »
Nice hack. Good pics, too. I could probably do that hack just by reading your post and pics!  ~~

Looking forward to seeing how it fares. Are you going to run some distance tests first? Back in the old days of 35MHz, we used to test TX/RX pairs by standing at one end of a field, and then one of us carrying the Rx, battery and a servo walking further and further, until the servo stopped moving smoothly. Managed to spot a few faulty Rxs back in the day like that  ;)
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Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #3 on: April 10, 2017, 15:12:38 »
Are you going to run some distance tests first?
Nope just fly.

If I can find a spot >500M LOS to try I'll give it ago.
Made 400M in it's previous form no problems.
Wasdale X, Ow that hurt

Offline Hands0n

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Re: Modifying the FlySky FS-i6
« Reply #4 on: April 10, 2017, 17:10:39 »
Nice mod.   ~~  Will be interesting to see if the antenna orientation helps with your glitches. 

What kind of range are you aiming for?  This fella got 2.3km from a stock FS-i6, which is the claimed range by the manufacturer (from recall).



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Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
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Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #5 on: April 11, 2017, 09:53:01 »
What kind of range are you aiming for? 

Oh nothing more than the legal limit. Honest guv  ;D
Would like to get out to 1K, one of the flights in the mountains I'd like to do is about 1K at it's furthest.

The flights I have done so far have all been close in so no difference noticed.

Managed to find a LOS path across a resovior that allowed me to get to ~550M before dropping behind a hill.
With existing antenna orientation was getting ~50% error as displayed on the TX.
With vertical antenna dropped to ~1% happy with that, but just by moving TX a couple of cm it increased to 20% error.

Also when I covered the other antenna with my hand the error rate increased, bit confused by this as I would assume the RF modules would use the antennas with the best path and not switch between them.

Seen that video before but can't remember what error rate if any he was getting at that distance. Might watch it again and see.
Wasdale X, Ow that hurt

Offline Hands0n

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Re: Modifying the FlySky FS-i6
« Reply #6 on: April 11, 2017, 15:21:03 »
At his furthest distance as I recall he actually hit 100% failures but some packets must have been getting through as he was able to grab control back and turn the multi-rotor around and head back. He did use RTH a few times on the way back.  The battery took a big hit as he pushed it to its absolute limits with only a few seconds hover time left at the end :o
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Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #7 on: April 13, 2017, 14:56:34 »
Managed ~1.6K range test, was getting @40% error rate at best but with a slight move of the TX  this jumped up, also it seems based on both antennas, I was expecting it to favor the best signal path but I think it is alternating between the 2. But quite chuffed with that, give me a lot more confidence.

23101-0
Wasdale X, Ow that hurt

Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #8 on: April 21, 2017, 07:26:54 »
So good he did it twice.

23117-0

My dead spots whilst flying have vanished.
Now I can't blame the TX for any crashes. ::)
Wasdale X, Ow that hurt

Offline Quadedd

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Re: Modifying the FlySky FS-i6
« Reply #9 on: April 25, 2017, 19:48:58 »
Thanks for your post, this looks great. I've got the FS-i6 and thought about this but not been able to get a chance to investigate.

From your photos above did you simply install the pigtail by soldering onto the 'ant2' and for your second antenna repeat the same process on what I think is 'ant1' hidden under some wires?

Thanks for you guide and help on this! looks like I'll be have to blame my piloting soon  :smiley:

Offline atomiclama

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Re: Modifying the FlySky FS-i6
« Reply #10 on: April 26, 2017, 07:34:40 »
The pig tails just use the push on connectors, you can see them in this close up.

Just pop the old ones off and and fiddle around with the new ones until they pop on.

Fairly easy.

23130-0
Wasdale X, Ow that hurt

Offline Quadedd

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Re: Modifying the FlySky FS-i6
« Reply #11 on: April 27, 2017, 23:56:10 »
Ah yes I see now, thanks for photos too. Will see how I get on.