[arm-allstar] AllStar Node progress

[Doug Crompton]

Joe,

Do you have a photo of your shielding that is working?

Doug

On Fri, May 18, 2018 at 12:26 AM, "Joe Puma via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> 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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> >>
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> >>
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> >
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> >
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