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Thread: Zello and Vox

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    Default Zello and Vox

    I have three Zello setups that transmit via RF to the repeater. It simply works by using the Zello PTT on the phone and having Zello app on the PC. The Zello PC outputs the audio via speaker out to the PM400s, which obviously activates the vox. All three on the PM400s work flawlessly.

    The issue I am having is using a Kenwood NX700 with a VOX controller. The VOX controller used is here . The microphone has been replaced by wiring from the PC (3.5mm to board). The VOX acts crazy. It will be spot on and work correctly, then start firing for absolutely no reason (annoying dispatch and locking up the channel), to not working at all.

    PC speaker output -> VOX controller -> NX 700 Pin 04 (EXT PTT) on DB25. The radio transmits and has audio, so the setup and pins are correct. The VOX controller is mounted via velcro inside of a plastic container.

    I am looking for the following suggestions:
    a better VOX controller
    a separate way to activate the EXT PTT when Zello PC app has audio out
    resistors, capacitors, diodes, etc. that may "clean up" 12V+/- and/or speaker audio

    Other suggestions are welcomed except for replacing the radio. It is Nexedge narrow 12.5KHz (wide iDas) and I must keep using it.

    TIA / 73
    Last edited by snig64; 13-05-19 at 04:08 PM.



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    can i just have a guess ???= you are getting rf into the vox unit put some ferrite beads on the mic input and on the power supply to it
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    Default

    Check this:

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    Quote Originally Posted by 580-Gabor View Post
    Check this:
    Interesting! I messaged him to see when production will start.

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    Do you think this might help?



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    yep but the mic line more so
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    Quote Originally Posted by hinekadon View Post
    yep but the mic line more so
    Am I able to put that on the mic line? I don't mean splicing it in, but I thought that appliance is made for DC and mic line is AC?

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    nope you get a brain fart sorry you only need a small ferrite on the mike line , If you smash apart a computor power supply you will find several in there with windings on them just slip one of those over the cable once or twice that has the effect of sucking the rf out of the mic lead and your vox will behave as it supposed to you only need a small one just big enuf to pass the lead thru ok ??
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    Quote Originally Posted by hinekadon View Post
    nope you get a brain fart sorry you only need a small ferrite on the mike line , If you smash apart a computor power supply you will find several in there with windings on them just slip one of those over the cable once or twice that has the effect of sucking the rf out of the mic lead and your vox will behave as it supposed to you only need a small one just big enuf to pass the lead thru ok ??
    Thank you. I have these already and I have put them on. We will see.

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    hmm maybe they are split so not so good for rf ok at lower frequencys ! havent you got a old computer p/s ? they are the rite grade of ferrite >?
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