[450] Link back up

[John Foege]

Alright woody calls added

On Tue, Nov 3, 2015 at 8:06 PM, John Foege <john.foege at gmail.com> wrote:

> ok Woody ...gonna add these calls now
>
> On Tue, Nov 3, 2015 at 6:43 PM, Daniel May <woodyboy.dm at gmail.com> wrote:
>
>> NQ1X; KB1THK.
>>
>>
>>
>>
>> Sent via the Samsung GALAXY S®4, an AT&T 4G LTE smartphone
>>
>>
>> -------- Original message --------
>> From: K1FSY <k1fsy at vhfwiki.com>
>> Date: 11/03/2015 10:17 AM (GMT-05:00)
>> To: 450 at lists.vhfwiki.com
>> Subject: Re: [450] Link back up
>>
>> cool.
>>
>> Everything you need to build it from git should be on there already, but
>> expect it to take a long time to compile :)
>>
>> On 11/3/2015 1:21 AM, John Foege wrote:
>> > The link is back up for testing.
>> >
>> > RF input side audio has been *significantly* improved.
>> >
>> > TX audio out from internet still sounds great playing through the
>> > integrated broadcom soundcard.
>> >
>> > I believe the PTT line issue is solved now. It seemed to be RF getting
>> > in via the BUSY/RECEIVING data line coming out of the radio back to the
>> > raspberry pi. A partial fix was to wrap this line 10-20 around a ferrite
>> > core. This seemed to solved the instability issue about 80% of the time.
>> > As an added measure, I placed a pull-up resistor on the PTT line on the
>> > raspi side from +5V board input to the PTT line output on the ULN2003A
>> > driver. This should help to force the PTT line to a determinate state
>> > and should solve the intermittent PTT line issue 100%.
>> >
>> > We tried moving both input and output audio streams to the attached USB
>> > sound card, and this worked, however the USB sound card had noticeably
>> > inferior output audio (read clock noise), and thus we switched back to
>> > the raspi's integrated broadcom sound card for output audio, while
>> > retaining the attached USB sound card for input audio (from the radio
>> > back to the raspi).
>> >
>> > Next steps will be:
>> >
>> > 1) Complete backup of SDCARD image
>> >
>> > 2) Backup of svxlink conf files (git or svn repo)
>> >
>> > 3) Extensive testing of link in current configuration
>> >
>> > 4) Download and compile latest svxlink binaries and start w/ a simple
>> > vanilla conf w/ no extraneous bullshit
>> >
>> > 5) Documentation
>> >
>> > 6) Stacked loop install and testing
>> >
>> > Anything I miss? Any input, comments, feedback, etc?
>> >
>> > What calls need to be added that are not currently in there? Or calls
>> > that need to be modified?
>> >
>> > I will follow w/ most current access list.
>> >
>> >
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>> >
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>
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