[arm-allstar] URI to TYT 9000D 220 mobile radio

[Doug Crompton]

Jerry,

  On the DMK/URI pins 19 and 20 are connected together inside so not sure
why you had that problem. You really do not need to connect them together
on the connected DB25. It has just been the way many have done it putting a
blob of solder across the two pins and then connecting any grounds there. I
guess whatever works for you!


*73 Doug*

*WA3DSP*

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

On Tue, Jan 15, 2019 at 10:54 PM "Jerry Swords via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> Not sure way but when I wired the DMK URI to the TYT 9000D 220 radio with
> pins 19 and 20 grounds bridged I had a hum on TX with the radio, I removed
> the bridge from pins 19 and 20, I used pin 20 of URI to the ground of the
> db 9 plug into the radio, then used pin 19 to connect to the shield and
> then to the outer shell of the db 9 connector  at the radio end and the hum
> went away, must have been a grounding problem on my end?
>
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