[arm-allstar] AllStar Node progress

[Doug Crompton]

Joe,

  I am not sure if it applies in your case but proximity of the radio you
are using to talk TO the node to the node itself might be causing your
problem. I have definitely seen situations where just being 20 feet or more
away from the node eliminates the whine. There is some kind of mixing
effect going on with close RF getting into the node radio. Remember if
others are hearing the whine it is when the node (888) radio is NOT
transmitting. It is only transmitting when you hear the whine.


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*


On Thu, May 17, 2018 at 5:56 PM, "Joe Puma via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

>
> After spending a week building my node I’m happy to have it just about
> complete. It setup with with a good amount of bells and whistles, it’s
> simplex but I can connect to the node with a few of my sip devices and iax
> works nicely too. I have some autopatches setup for dialout with my sip
> providers.
>
> The most trickiest part I had was getting rid a high pitch ring in the
> audio when the radio transmitted due to the RF floating around. I’m using a
> Baofeng 888.  With the radio not being properly shielded everything is hot
> with RF and if the antenna is nearby forget it. Btw I left the power alone
> I’m just in low power.  I grounded everything I could and shoving
> everything in a metal box, it helped with keeping the antenna outside but I
> still had that high-pitched ringing sound in the audio.  I finally had some
> luck wrapping the entire radio with this IR blocker I had laying around.
> Man you can wrap your cell phone in this stuff and after a few seconds it
> loses all signal lol. It didn’t work wrapping the sound card or isolating
> it from the radio or covering the raspberry pi  and power supply.  It
> worked best buy wrapping the radio in it isolating whatever RF is coming
> off of the radio and bouncing around inside the metal box.  The antenna
> outside is not penetrating the case at all and finally I don’t hear the
> ring at all anymore.   Boy that was annoying not sure if anyone else had RF
> in their audio problems but just wanted to mention what work for me.  Happy
> to have a QSO with anyone who wants to connect to my node. 46596. This
> thing is ready to float around In orbit 🛰☺️
>
>
>
>
> More pics at http://www.instagram.com/KD2NFC
>
> Joe
> KD2NFC
>
>
> Sent from my iPhone
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