[arm-allstar] chinese mobile radio??

[B Harvey]

Kevin,

   I'm not sure of the exact revision. I do know that every attempt to use
pin 21 fro input has resulted with audio that was too low to properly drive
my node and I've had to use pin 9 with a DC blocking capacitor regardless
of the radio used. Using pin 9, I have been with the capacitor I've been
able to use both a Baofeng UV 82 and an Alinco DR 435 MK3.   After
initially setting my levels, I've received reports of good audio and my
DTMF command have worked without a problem.



Brian / KK6DOQ

On Fri, Apr 26, 2019 at 5:31 PM Kevin Custer <kevin at kc-wireless.com> wrote:

> Brian,
>
> By chance is the DMK URI you have and newer "URIxB"?  If so, the
> hardware has been redesigned to provide less attenuation in the audio
> path when using pin 25.  This is a requirement to make the URIxB have
> the same RX audio level as compared to a URIx.  This was accomplished by
> changing the value of R5 (previously a 470k) to a 39k.
>
> Kevin W3KKC
>
> On 4/26/2019 6:12 PM, "B Harvey via ARM-allstar" wrote:
> > John,
> >
> >     I connected mine to a DMK-URI USB audio adapter before connecting to
> the
> > RPi. For the most part, it was a direct pin to pin connection between the
> > Alinco DB9 and the URI DB25 with the exception of one DC blocking
> capacitor
> > at pin 9 of the DB25. For some reason, the standard input on my URI
> doesn't
> > have enough gain on the standard receive pin. I can provide the pin
> wiring
> > I used if you'd like.
> >
> >
> > Brian / KKDOQ
>
>