[arm-allstar] simpleusb / channel driver merge status?

[David McGough]

Hi Richard,

Are you using a URI or URIx audio adapter?  If so, I've had superior
results by adding an extra, heavy-gauge ground lead to the URI. Then, I
directly connect this lead to the repeater chassis--a screw on a Kenwood
TKR repeaters...This has been my #1 ground-loop solution.

Here are a few sample photos:

https://hamvoip.org/kenwood-TKR/P1030817.JPG
https://hamvoip.org/kenwood-TKR/P1030820.JPG

Test TKR-750-2 repeater on bench:
https://hamvoip.org/kenwood-TKR/P1030831.JPG

ALSO -- on the TKR750/850 repeaters, make sure to notice that the 25-pin 
accessory plug has separate analog and digital grounds! 

If you've got RF or other noise issues with simpleusb telemetry, I doubt 
switching to usbradio DSP-based signaling will fix anything. Try running 
the TX into a dummy load and test, if possible.

73, David KB4FXC


On Sun, 1 Oct 2017, "Richard Bateman via arm-allstar" wrote:

> Hi,
> 
> I've been having some issues that I'm starting to suspect might be
> related to RF getting into my interface cables triggering my COR and
> CTCSS lines (not in any way convinced, but it's on my list of
> suspects) and have been toying with the idea of using usbradio instead
> of simpleusb for awhile; last time I did that the audio was kinda
> crappy, so I switched to simpleusb.
> 
> While looking around I noticed that there is a "TODO" on the hamvoip
> page about merging the channel drivers, which I assume might be
> something along the lines of using DSP for COR and CTCSS detect but
> using the other audio for actual TX?
> 
> Anyway, I'm just wondering what the status of that is and if there is
> any way I can help with the efforts; it would help me out a lot on
> several different projects.
> 
> Richard
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