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Thread: A simple, yet effective Ground Station build in 30 minutes

  1. #21
    Lumenier.com timnilson's Avatar
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    Quote Originally Posted by IBCrazy View Post
    Ok, so this one takes a bit more thought, but this is what I fly.
    Attachment 7589Attachment 7591

    No tracking, no diversity. Just a dual band repeater with recorder and voltmeter. It has a 7.5 dbic 3 turn helical and a 8.7dbic 2.4GHz helical mounted to a foldable tripod. The output is run to a FPV Japan DVR and a 100mW Fatshark 5.8GHz transmitter. That transmits to my FatShark goggles so I'm totally wireless.

    Attachment 7590

    -Alex
    Very Nice!!!! Does the extra wireless jump from your GS to your goggles degrade the picture at all?

  2. #22
    Lumenier.com timnilson's Avatar
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    Quote Originally Posted by GregSilver View Post
    Tim, the swp will be effected that close to the rx too. I know this is supposed to be simple setup, but if you were only using the omni, your range may be highly effected. Figure out a way to raise it above, like Alex has it on the repeater for his 5.8
    I have to ask Alex to make me a BluBeam whip with a longer cable
    That'll solve this issue and keeps the build just as simple.

  3. #23
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    Gonna do exactly this once I get my patch antenna and duo receiver, only I will flip the receiver 180 degrees so the antenna outputs are up top so that my omni antenna can sit above anything else.

  4. #24
    Lumenier.com timnilson's Avatar
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    Quote Originally Posted by londonguy View Post
    Gonna do exactly this once I get my patch antenna and duo receiver, only I will flip the receiver 180 degrees so the antenna outputs are up top so that my omni antenna can sit above anything else.
    Good idea. Try to come up with something that holds the Goggle cables going into the Duo in place as they will be pointing down. Please post pictures when you get this together!

  5. #25
    Lumenier.com timnilson's Avatar
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    After seeing Alex's GS, I thought it would be worth pointing out what the back looks like of the "30 minute GS":


  6. #26
    Navigator Traveller's Avatar
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    Cool

    Oew I like this thread!

    Here are some pic of my simple GS


    Click image for larger version. 

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    "For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return." - Leonardo da vinci



  7. #27
    Navigator citi888's Avatar
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    Quote Originally Posted by timnilson View Post

    The nice aspect to using this solution is that you get RSSI and Lipo voltage to the display with an additional voltage divider that plugs into the RX (no bulky additional telemetry base).
    http://www.hobbyking.com/hobbyking/s...y_System_.html

    .
    I am looking for a similar simple product, but I would like to only display the RSSI in my video glass. So it a simple very simple OSD, but I don't find it (no current sensor)....Do you have an idea ?


    It is for the Tricopter Delrin....
    Last edited by citi888; 6th March 2012 at 01:34 PM.

  8. #28
    Navigator citi888's Avatar
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    Quote Originally Posted by timnilson View Post
    Good question! I've recently switched to a FrSky DHT-U (it's a 2.4 TX and telemetry RX with display in one enclosure)
    http://www.hobbyking.com/hobbyking/s...y_System_.html

    I connect that to my Spektrum DX-7 via the same mini-plug mod that I use to connect my EzUHF.
    http://www.fpvmanuals.com/2011/03/17...ezuhf-or-tlrs/

    You can then attach a patch antenna to the DHT-U to increase range to a respectable 5km or so. That's probably the most you'll squeeze out of any 2.4 system. After that, you'd have to switch to UHF/LRS.
    http://www.hobbyking.com/hobbyking/s..._Modules_.html

    The nice aspect to using this solution is that you get RSSI and Lipo voltage to the display with an additional voltage divider that plugs into the RX (no bulky additional telemetry base).
    http://www.hobbyking.com/hobbyking/s...y_System_.html

    The FrSky receivers are also very affordable. An 8-channel, diversity, telemetry sending capable RX is as little as $25 bucks.
    http://www.hobbyking.com/hobbyking/s...elemetery.html

    This enables me to get the key stats (RSSI and Lipo voltage) without the need for an OSD.
    Tim,

    Do you think that with this setup I could have the RSSI in a simple OSD like http://www.flytron.com/41-simpleosd-xl-edition.html because I don't understand how do you fly with your video goggles and check a the same time the RSSI on the FrSky DHT-U screen ?


    Edit post : Finaly I found this FrSky RSSI-DAC Converter for OSD I will test it.
    http://www.ebay.com/itm/ws/eBayISAPI...m=120724292816
    Last edited by citi888; 9th March 2012 at 07:55 AM.

  9. #29
    Lumenier.com timnilson's Avatar
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    Quote Originally Posted by citi888 View Post
    Tim,

    Do you think that with this setup I could have the RSSI in a simple OSD like http://www.flytron.com/41-simpleosd-xl-edition.html because I don't understand how do you fly with your video goggles and check a the same time the RSSI on the FrSky DHT-U screen ?


    Edit post : Finaly I found this FrSky RSSI-DAC Converter for OSD I will test it.
    http://www.ebay.com/itm/ws/eBayISAPI...m=120724292816
    The FrSky DHT-U has audible alarms you can set for both voltage and RSSI. So as your RSSI drops to '50' (for example), you can hear alarm1 -- if it drops to '40', you can hear alarm2. The same is true for the voltage alarms. While you can't 'see' the alarm, the result is the same -- you know when you're running out of signal or voltage and have to turn around. I will look into the OSD converter though -- looks interesting!

  10. #30
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    Quote Originally Posted by timnilson View Post
    Alex's idea of adding another 90 degree connector works well... looks a bit like a plumber went to town, but the 'run' is still super super short into the RX. But, it added a whole minute to the build time! Make that the "31 Minute Ground Station"

    I think this is a dumb setup.
    Why not rotate the diversity receiver 180 degrees so the antenna inputs are pointing up.
    Install a antenna cable between the patch and the diversity receiver and connect the bluebeam direct to the diversity receiver pointing straight up.

    • This way you have a very short power supply run to the diversity receiver.
    • The power supply will not interfere with you receiving antenna output. Which it probably will do where it runs below the patch connection now.
    • And best of all your bluebaem antenna has free sight in all directions without any interference.
    • And a antenna wire is probably cheaper than those angled and male-male sma connectors.

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