Welcome to Multi-Rotor UK. Please login or sign up.

Sunday,February 23, 2020, 16:36:37

Login with username, password and session length


17 Feb 2020 16:56:32
Welcome Andy777! You might get a better response if you drop your question onto one of the Forums here - answers would just get swamped.  :beer2:
14 Feb 2020 16:14:59
Hi there. Im new. Having problems with my tarot landing gear. Its plugged into ch7 on futaba receiver. When i flick switch on transmitter i can hear a faint click on both legs but no movement. My flight controller is a mini px4 with no aux out terminals.
09 Feb 2020 16:57:32
and another :smiley:
09 Feb 2020 10:22:04
Time for a new shoutbox post   ;)
Rares Gosav:
17 Jan 2020 17:44:22
Hi guys and happy new year!!!
01 Jan 2020 00:12:50
Happy new year everyone, happy flying.  :beer2: :beer2:
31 Dec 2019 17:06:13
Happy new year all hope 2020 is a cracking year for you  :beer2:
25 Dec 2019 00:00:49
Happy Christmas to everyone.
24 Dec 2019 13:50:56
Seasons greetings to all on this forum have a good one ;)
21 Dec 2019 17:58:42
Have a great time DB. Look forward your projects in 2020.  :beer2:
  • Total Members: 8100
  • Latest: MattFPV
  • Total Posts: 197742
  • Total Topics: 19955
  • Online Today: 48
  • Online Ever: 530
  • (Tuesday,June 26, 2012, 08:34:46 )
Users Online
Users: 1
Guests: 40
Total: 41

Theme Changer


3d - Printworx

Printing 3d Forum

Setting up 3DR telemetry for your APM2.5

Started by benchmark, Thursday,May 16, 2013, 23:24:52

Previous topic - Next topic


A series of 4 videos, get your favorite beverage and a comfortable stool   :popcorn:

I hope it proves useful to somebody.



Really informative post, cheers pal!

On a side note, where can I find one of those plates that you have your FC mounted to?
I reverse polarities for fun.


Thanks guys.

Quote from: Calomile on Sunday,May 19, 2013, 15:46:41
Really informative post, cheers pal!

On a side note, where can I find one of those plates that you have your FC mounted to?

It was a chance find on ebay. i do not know who makes them or where they are originally from.


Wednesday,May 22, 2013, 10:01:49 #4 Last Edit: Wednesday,May 22, 2013, 10:28:27 by optiplex
any idea, why the grouind and remote stopped binding after i tried to load the settings like in the 3rd vid ?


EDIT: ok problem solved
          seems when i saved config the min and max freq values wasnt the same so the 2 units couldnt bind, so i changed in the         base unit to 414000 both min and max and they are binded again


Thanks again for your post, was a really big help setting up my APM. Solved quite a few headaches!  :notworthy:
I reverse polarities for fun.


got a 433 unit from HK

plug n play worked straight out of the box

550 RC Spider quad for FPV
550 Alien quad (my sons now)
F450 quad
450 size bell 212, MD500,Augusta 109
600 size Huey running apm 2.5  3 planes  Taranis and 9xr  radios Skyzone FPV goggles


I have this kit from rctimer but it';s not working beyond a couple of meters. The ground station is swamped with noise to the point comms slows down, stalls and eventually disconnects.

Looking over many threads, most blame the USB bus which operates around the same frequency and the ground station not filtering this noise. Others blame mismatched antennas.

Solutions suggested include USB cables and extentions and even powered hubs but they didn';t work for me. Others suggest buying good antennas but that';s a cost risk I don';t want to take right now.

Likewise, I';m told to buy and use a second air module as the ground station.

Does anyone have any deep undestanding of this problem and a definitive fix, preferably for litte cash please?
Ifly4 no more, Hubsan X4, R550v2, X650F-V4


The Antenna';s for sure. Peter King and myself have been doing a good bit of research in to 433MHz telemetry and earlier this week we managed 5km which we were very pleased about. At the max distance we still had 20-30% signal strength.

What you need is 4 bits of solid copper wire 16.4 CM in length. I used the earth core from some twin and earth.

Solder one piece to the inner of the SMA connector and one to the outer and bend out at 45 degree';s in to a V shape. Repeat for the other end and test. If you don';t fancy soldering direct to the SMA connector you can hack apart the antenna';s that come with the radio';s and solder to the inner and outer of the coax.

If you want a good range then get the radio up away from the PC on a pole.

First flight was 2.5km away

Second was the 5km one.

I hope this helps.


Hi Steve,

Thank you for this response. That';s a nice cheap test I think I can manage.
Ifly4 no more, Hubsan X4, R550v2, X650F-V4


Woohoo, cheers Steve.

With GSC indoors (transmitting through front door, wall and/or front window and the occasional tree  :laugh: ) I maidened my new build in the same spot where rctimer antenna';s would drop connection.

With your recommended DIY 16.4cm soldered jobbies, am getting 96% signal.

Co-incidentally, rctimer replied today with a counter-offer to send replacement antenna';s. I told them where to stick em.
Ifly4 no more, Hubsan X4, R550v2, X650F-V4


Any chance of a picture of the "new" antenna?

Sent from my C6603 using Tapatalk 4

"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2


Had to take this in a rush so if there';s any specific detail missing you wanted to see, let me know
Ifly4 no more, Hubsan X4, R550v2, X650F-V4


Thanks very much. I see what you';ve done.  Makes one wonder why they bother with the rubber ducks at all. Begging for trouble.
"Its better than bad, its good"

Current FCs: Pixhawk, APM 2.6, Naza M V2, Naze32, Flip32+ CC3D, KK2.1.5
Aircraft: miniMax Hex, DJI 550 (clone) TBS Disco, 450 Firefly, 250 Pro, ZMR250, Hubsan X4, Bixler 2


looks as though you have created a dipole which is what i use on my dragonlink, if so i think its reccommended to have the ground straight down and the signal straight up.


What is better in regard to 3dr antenna location on the quad, further from GPS or receiver 2.4 aerials


I bought one off of ebay a while ago.  Pumped hours into trying to get it to work.  Countless drivers, converters and fiddling.  Got the air station to connect to the mission planner, though the ground station just would not talk to the PC.  All of the light on both units suggested they were talking, though the GS just would not connect.  Shame.  I still have it, may put everyone through my troubles and try and get it working one day...
650 Ironman, Inspire 1, Tarot 250, DJI S900
RPQs Qualified with PFAW