[arm-allstar] Issues with DMK URIx USB

[David McGough]

Kyle,


Sounds like you're on the way to resolving the issue.  I don't know about
the TYT, but it might have a service menu where you can turn the low-power
setting down further, below 10W??

Another possibility would be to add an in-line attenuator, if you only
need very local coverage. You can find new/used/surplus attenuators all
over ebay. Here is one example:  https://www.ebay.com/itm/372473295574

....Having a few in-line attenuators around also comes in handy for 
bench testing, of course. With a 10dB attenuator attached to the TX, it'll 
always see a return-loss of at least 20dB (SWR under 1.3:1), even with no 
additional antenna attached! Very useful for testing.


73, David KB4FXC




On Sat, 22 Dec 2018, Kyle Krieg wrote:

> David,
> 
> After a large amount of testing, I think your on to something.
> 
> I did transmit into a dummy load and no issues were present.
> 
> Not sure your aware, but the TYT transmits at 10W at it's lowest power,
> which is way more than I need.  The antenna is 10ft from the radio and Pi,
> which I suspect it the issue.
> 
> I'm pushing all my RF into a dummy load for now to see if that helps the
> issue with the TYT, or it's back to the Baofung 888 at a 1/2 watt to help
> solve the issue.
> 
> Kyle
> 
> 
> On Sat, Dec 22, 2018 at 3:40 PM David McGough <kb4fxc at inttek.net> wrote:
> 
> >
> > Kyle,
> >
> > My suspicion is either an RFI condition that occurs when transmitting, or
> > perhaps a ground loop.
> >
> > Have you tried transmitting into a dummy load and looking for these
> > errors?
> >
> > 73, David KB4FXC
> >
> >
> >
> > On Sat, 22 Dec 2018, "Kyle Krieg via ARM-allstar" wrote:
> >
> > > All,
> > >
> > > I've recently had issues with my DMK URIx USB with misc errors when
> > > transmitting.  It has been working fine for months and now these errors
> > > started happening.  Had to take a screen shot of the errors as I could
> > not
> > > get them to display when SSH'ed into the Pi.
> > >
> > > https://photos.app.goo.gl/uCU9bTpGTTWPBp92A
> > >
> > > I'm running a Pi with the hamvoip image into the URI with a TYT9000 as
> > the
> > > radio.
> > >
> > > Things I have tried.
> > >
> > > Swap out Pi
> > > Change power supply
> > > Rebuild the Pi node with a fresh image
> > > Swap out the URI for another URI
> > > Swap out the USB cable from Pi to the URI
> > > Check the connections to/from the URI to the radio
> > >
> > > Only thing I have not changed is the radio, which I would not think would
> > > be bad in this situation.
> > >
> > > Do I have a bad URI?
> > >
> > > Kyle
> > > _______________________________________________
> > >
> > > ARM-allstar mailing list
> > > ARM-allstar at hamvoip.org
> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> > >
> > > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> > >
> >
> >
>