[arm-allstar] DIY CM119 pin 48 voltage

[Doug Crompton]

Jim,

 I have blown out COS inputs screwing around. There is a possibility it is
just the internal pull-up that is bad. You could try putting a 10K from pin
48 to 3.3V on the FOB board and see if it shows high and pulls low in the
view screen of simpleusb-tune-menu - COS Input. Its worth a try before
throwing out the FOB. Also you are testing this with nothing attached to
the FOB COS? If you have anything attached it could be pulling it down.


*73 Doug*

*WA3DSP*

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

On Sun, Apr 28, 2019 at 10:59 PM "James WD0JB via ARM-allstar" <
arm-allstar at hamvoip.org> wrote:

> On pin 39 I get the same reading of about 200mv. The radio adapter is the
> uv82 wiring from hamvoip, however with a npn bjt instead of the mosfet.
>
> Thanks for all the help. I've got some more sound fobs on order.
>
> James WD0JB
>
>
>