[450] the link

[David McKenzie]

John is going to run it by his parents this weekend he said. More progress
on the hardware, the radio is in sorry shape but the interface appears to
work. Don't know if some audio filtering is going to be needed or if I can
fine tune on the OS but i'll need to try Chris' HTX soon since it's already
set up. As for the PTT inversion logic I just hacked up the source code to
the svxlink echolink server to PTT via GPIO pin. Here's a pic of the rough
interface and the "computer".

[image: Inline image 1]


On Mon, May 20, 2013 at 9:00 PM, Bob <n1ujs at toast.net> wrote:

> Anyone got a gas tube to donate so we can leave this thing running?
>
>
> On Mon, May 20, 2013 at 5:00 PM, David McKenzie <k1fsy at vhfwiki.com> wrote:
>
>> made some progress today with the new link controller. Keying circuit and
>> audio appear to work fine, however RTS is automatically set HIGH when the
>> GPIO pin for RTS is set to work as part of the serial port so at the moment
>> if the software isn't running the interface will be keying the radio
>> because the software holds RTS low to inhibit tx.
>>
>> Bad news is that my HTX-212 doesn't sound like its working so well
>> anymore, lots of CPU noise on RX and can barely hear the HT through it.
>> Looks like we will be in need a replacement rig.
>>
>> 73s
>>
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>>
>>
>
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