My amp/antenna build and distance test (I will update thread as i go)

Discussion in 'Mavic Modifications (All Models)' started by droneuser, Mar 20, 2018.

  1. droneuser

    droneuser Well-Known Member

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    In this thread I will post my amp/antenna build as I go. I will also post screen shots of the flight so people can see for themselves :) of course i will fly the same route for every test. I will be standing or sitting for the tests ( i wont be on a deck, roof, etc) I will also do tests with and without amps but using different antennas

    NOTE: at this time i am only running a stock battery

    I live don't live in the city but i am not totally country either, so that i guess make it ruralish...lol

    I have some houses some trees and open fields by me

    I hope this weekend i will get the MAX STOCK fight that i get in MY AREA. when i do i will post a screen shot and/or a small video. video of course will have the fight data per screen recording.

    here are some threads I did on amps, watts, dbi

    updated on 3/17/18 DIY controller amp antenna mods only!

    converting antenna dbi to watts and amp watts to dbi what are you really getting for output!

    The builder Channel - my YouTube channel with flight videos, info,etc
     
    #1 droneuser, Mar 20, 2018
    Last edited: May 24, 2018
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  2. droneuser

    droneuser Well-Known Member

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    here is the first batch of parts that came in today

    9dbi antennas that came with cables however cable in my opinion are to long for the remote. i have other cables on the way

    cost for both antennas with cables was $10.30 (us dollars) free shipping. so if you don't mind the longer cables you can have better antennas for that price :) if you decide to use the longer cable you should "coil" the cables inside the remote by doing this it will help with cancelling "RF noise" that it may pick up thru the cables

    9dbi whip.jpg
     
    #2 droneuser, Mar 20, 2018
    Last edited: Mar 20, 2018
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  3. droneuser

    droneuser Well-Known Member

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    So you can get the general idea of the area i live in here is a sat view. The RED arrow is showing the direction i will be flying there are some trees,open fields, houses here and there.




    areanew .jpg
     
    #3 droneuser, Mar 20, 2018
    Last edited: Mar 20, 2018
  4. droneuser

    droneuser Well-Known Member

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    here is another view this view showing the other "side" of the red arrow.

    i am picking this flight path for a couple of reason:

    1). trying to find a setting most people may have

    2). I want to stay away from highways/roads/ etc

    3). there are less house this way

    4). I know the area so if i loose/crash i hope to find it!...LOL keyword "hopefully"

    5). it has more "area" for a emergency landing if I cant RTH


    area bigger.jpg
     
    #4 droneuser, Mar 20, 2018
    Last edited: Mar 20, 2018
  5. droneuser

    droneuser Well-Known Member

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    The mavic pro ( label with my info (FAA number and my cell number if found reward and trackimo 3g tracker) the unit is stock.

    I have dji refresh and state farm ins

    smaller ac.jpg
     
  6. droneuser

    droneuser Well-Known Member

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    my remote setup

    128 gig ipad mini 4 with cellular service and since its in my back yard i will also have access to 5ghz wifi ( i don't want to use 2.4ghz wifi due to interference)

    the little black "box" is a 5,000mah battery pack just in case if my remote battery gets to low

    i will be using the dji goggles too ( as for spotters i have a plan for that law states must have eyes on AC i will have a few friends along fight path with two-way radios i will be wearing a ear type of "headset" ) we will be using gmrs two-way radios frequencies they use are 462 MHz and 467 MHz so it shouldn't cause interference....law saids NO visual aids but it don't say anything about using hearing aids that i could find :)

    yup it will cost me some beer..lol but we will take turns so some of the fights wont be by me just a fyi on that!

    of course once my other parts come in the remote wont be stock any more :)

    remote.jpg
     
    #6 droneuser, Mar 20, 2018
    Last edited: Mar 20, 2018
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  7. Hayabusa

    Hayabusa Well-Known Member

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    Have you done a stock test on same path? How far before loss of signal?
     
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  8. droneuser

    droneuser Well-Known Member

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    I haven't on that path yet but I will be hopefully this week yet or weekend depending on weather also my remote is still stock in till I get at least 3 fights down that path and all my parts come in

    but it seems on other paths in my area I got to about 3,000 then I start to drop in video feed but at that time I wasn't doing it for a distance test. I was just playing around and i wasn't that high too
     
  9. droneuser

    droneuser Well-Known Member

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    ok after looking at the sat view more I am going to change the course a litte bit due to a highway off to the "right" I will go more towards the "left" which is ok but I am not excited about the trees tho! lol that could be a problem for an emergency landing!! but there are some open areas close by to ( you cant see that with the sat view I posted)

    kinda a cold out right now maybe later today will have to see


    test map.jpg
     
  10. droneuser

    droneuser Well-Known Member

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    Stock distance test 1

    I had a chance to get one flight in! this is with a stock controller and stock mavic pro I have to admit I wasn't expecting this 4,373 at a height of 182 I maybe could of went out more by going higher but I chicken out..lol I was sitting in a chair the whole time. I was using dji goggles and a ipad mini 4

    mavic has no mods at all everything is stock!!

    in this screen shot I stop and was starting to turn back

    stock distance.jpg
     
    #10 droneuser, Mar 21, 2018
    Last edited: Mar 21, 2018
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  11. Rnl

    Rnl Well-Known Member

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    Three bars take it out there it'll be ok
     
  12. Rnl

    Rnl Well-Known Member

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    Looks hilly there
     
  13. SkyNinja

    SkyNinja Well-Known Member

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    Looks like you live a fairly rural area you should be able to fly out 3+miles easily.
     
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  14. Rnl

    Rnl Well-Known Member

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    Hills depends if he is on top of one.
     
  15. droneuser

    droneuser Well-Known Member

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    yes there are hills and no I am not on top of one :( I am going to try to go out even further maybe later today
     
  16. droneuser

    droneuser Well-Known Member

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    by looking at that picture more I am going to have to set my RTH height higher!
     
  17. Rnl

    Rnl Well-Known Member

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    Before you amp. you should try the FCC boost mode in your distance run. Maybe give some all they want, and pretty easy to do.
     
  18. Rnl

    Rnl Well-Known Member

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    One more thing to compare to.
     
  19. droneuser

    droneuser Well-Known Member

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    yes I may do a compare with that too BUT I don't like the fact it heats up the controller it may be ok but I hate to ruin it
     
  20. droneuser

    droneuser Well-Known Member

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    Stock distance test 2

    I have two pictures the first one is my max at a 186 feet. The second one is my max at 244 feet. This is about the furthest I can do before RTH kicks in. NOTE I am going more by the HD signal cause I figure what good is the controller signal if you cant see :)

    1 stock 2.jpg

    2 stock 2.jpg
     
    #20 droneuser, Mar 22, 2018
    Last edited: Mar 27, 2018
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