[arm-allstar] Baofeng 888s and Raspberry Pi 3. Once Pi bootsfully, Baofeng locks in transmit

[Doug Crompton]

Mike,

   Yes this is correct. The source of the FET also goes to ground.


*73 Doug*

*WA3DSP*

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



On Sun, Mar 18, 2018 at 8:51 AM, "Michael Staggs via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> Well, there’s my problem. I’m not using a DB25 and didn’t look at that
> schematic. I put the 10k resistors on PTT and RX where they go on the
> board, then wired straight from Baofeng to FOB.
>
> So, it looks like I need a 10k resistor inline connected to the gate of a
> 2n7000, the source and drain connected to a 1n4007 diode and then the drain
> going to Baofeng PTT. Is that correct?
>
> I already have the 10k resistor on the Baofeng for RX…. I still need a
> 10uf capacitor and another 47k resistor before it goes to the FOB? I’m not
> doing the LED.
>
> Thanks
>
>
>
> Sent from Mail for Windows 10
>
> From: Doug Crompton via arm-allstar
> Sent: Sunday, March 18, 2018 12:55 AM
> To: ARM Allstar
> Cc: Doug Crompton
> Subject: Re: [arm-allstar] Baofeng 888s and Raspberry Pi 3. Once Pi
> bootsfully, Baofeng locks in transmit
>
> Mike,
>
>  Once I sent that I saw you had the issue in the subject. If the 888 goes
> into TX and stays there I would say there is a problem on the PTT line
> somewhere. You do need to use a FET and resistor as shown in the schematic
> between the FOB and the radio. You can't just connect the output of the FOB
> to the PTT of the 888. In rpt.conf the duplex setting should be 1 -
> duplex=1.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
> On Sat, Mar 17, 2018 at 10:22 PM, "Michael Staggs via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > I’m sure I did something wrong. 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
> >
> > _______________________________________________
> >
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> > arm-allstar at hamvoip.org
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> >
> > Visit the BBB and RPi2/3 web page - http://hamvoip.org
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>
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