[arm-allstar] AllStar Node progress

[Joe Puma]

Hi Doug. It’s the 888 that is transmitting. I hear the wine on my end point radio. RF is getting into the  sound fob when it’s outputting audio and the 888 is transmitting.  Going into the node with my end point HT sounded fine but I know what you mean. I can hear others when they are in close proximity to their nodes, there’s hum and other interference. So far my audio is really clean now. This material really blocks the RF leaking from the radio itself. With the short board 888 I got the diecast frame wasn’t even isolating the RF area of the board. It was all exposed.  I ditched the frame because it was too bulky and didn’t properly shield the radio anyway. Happy to have clean audio and the metal netgear case really helps. 

Sent from my iPhone

> On May 17, 2018, at 10:37 PM, Doug Crompton via arm-allstar <arm-allstar at hamvoip.org> wrote:
> 
> 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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