[arm-allstar] Can someone listen to this?

[Doug Crompton]

Mike,

  I think I answered this before as I remember you sending this email. I
would follow the simple FOB modification howto on the hamvoip.org web page.
We don't remove any resistors and although you could do that the more you
mess around with the board the more you have the chance to screw something
up. There is also no reason to remove the connectors on the FOB. You can
solder directly to the connector leads.

You must use the PTT circuit as described in the hamvoip.org howto
schematic as well as the diode in the COS line and use the resistors to
lower the audio levels between the 888 and the FOB.  You use  cosfrom=usb
NOT usbinvert.

Also be aware that the 888 can introduce RF feedback into the circuit so
don't use the rubber duck antenna. It is best to use an external antenna a
distance away. Strange things can happen when you get RF back into the
electronics.


*73 Doug*

*WA3DSP*

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


On Sun, Mar 25, 2018 at 11:32 AM, "Michael Staggs via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Sorry… Baofeng 888s
>
> I wired the chip up COS and PTT to the pins as shown here:
>
> http://www.garydion.com/projects/usb_fob/
>
> I wired the left and right jacks up according to here:
>
> https://hamvoip.org/hamradio/usb_fob_simple_modification/
> images/DSC02054.jpg
>
> And I wired the Baofeng 888s up according to these instructions:
>
> http://crompton.com/hamradio/baofeng888/New-888-mods.pdf
>
> I used the RPi2-3 Image Version 1.5rc16 image
>
>
> Sent from Mail for Windows 10
>
> From: Doug Crompton via arm-allstar
> Sent: Sunday, March 25, 2018 8:59 AM
> To: ARM Allstar
> Cc: Doug Crompton
> Subject: Re: [arm-allstar] Can someone listen to this?
>
> Mike,
>
>    I am not sure what you are doing there. What radio are you interfacing
> to? What circuit are you using? What FOB are you using? Did you modify the
> FOB?
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
> On Sun, Mar 25, 2018 at 1:58 AM, "Michael Staggs via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > I’m making great progress with my node. When I plug the pi in, it shows
> up
> > on allstarlink as active. I had problems with it holding PTT down and
> just
> > clicking. So, I added the resistor, transistor and diode on PTT as in the
> > schematic. Now, however, I’m getting this. I told it to give me the
> > status…or maybe the time. Instead, I got these short little transmissions
> > of clicks. You can hear it here:
> >
> > https://instaud.io/1X0q
> >
> > On receive, I already have the 10k resistor. Is this because I didn’t add
> > the 47k resistor and 10uf capacitor before it goes to the FOB? Or is this
> > completely different? I really don’t want to keep buying electronic
> > supplies if it’s not going to work anyway, but if it’s truly what’s
> causing
> > this then I will buy them. I have a 68k resistor and 100uf capacitor, but
> > those won’t work, will they?
> >
> > Sent from Mail for Windows 10
> >
> > _______________________________________________
> >
> > 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
> _______________________________________________
>
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>
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>
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>
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