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Thread: EZUHF JR w Diversity 8ch RX RANGE ISSUES - w Video Scan

  1. #1
    Join Date
    Dec 2012

    Unhappy EZUHF JR w Diversity 8ch RX RANGE ISSUES - w Video Scan

    Hi everyone,

    I'm having a little difficulty with poor range using my new EZUHF JR Module bound to my UHF 8ch Diversity RX. I've been flying FPV for couple years but I'm new to UHF so I need a little help as my current range is roughly 300m or close to 1000ft before failsafe kicks in.

    I'm not looking for massive range, but less than 1000ft is not good.. I'm looking for something closer to 4000ft, is that reasonable?

    I really don't know what to do as I'm new when it comes to UHF, any suggestions would be awesome.

    I'm in Laguna Beach, CA area.

    Herewith some additional info on my setup:
    Firmware: Firmware 1.50 (6) on both TX and RX
    Radio: Taranis
    Radio Antenna: SRH771
    Power Setting: Low (200mw)
    ESCs: 20Amp Afro x 4
    vTX: 5.8GHz ImmersionRC 600mw
    Controller: OpenPilot CC3D
    Motors: X2212-13 SunnySky
    Camera: 600TVL Sony (FPV Cam) w Mobius for recording
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by h8tow8; 28th February 2015 at 01:30 AM.

  2. #2
    FPV Techanic RonSII's Avatar
    Join Date
    Dec 2011
    Hi H8tow8, have you tried to eliminate the cause of the interference by doing scans with different components unplugged ie...cam's,tx's...? the mobius which emits some uhf interference can be shielded with copper tape that helps to lessen it's effects and also some of the sony 600tvl cams are pretty bad in this respect also but again can be helped with some creative shielding another thing to check is how your system is wired... have you looked into ferrite beads and braiding wires? another thing to consider is running ppm from the RX to your CC3D I think it support it... I switched one of my older naze's over to this and it seemed to improve my numbers on the EZUHF, I just attributed it to less wires feeding RF into the RX.

  3. #3
    Join Date
    Dec 2012
    Awesome, appreciate the response, I decided to rather post a little video in my OP that I just uploaded which I think will help to give you a much better picture as to what happening. Can you take a looksie and let me know your thoughts?

    Then regarding the suggestions you made, is there anything you can recommend that I wrap my wires in, would using aluminum foil be a option?

    It looks like I'm getting close to -93dBm range with the quad powered on (everything except Tx). Is that about right? Or should I be closer to -100dBm w my quad turned on?

    I have 436-438MHz band turned on because I notice some unwanted noise in 432-435 range, not sure what that is.

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