[aprssig] Dayton/xenia

[Robert Bruninga]

Actully, very few people lieave their APRS running in their car in the
parking lot once they arrive.  And when they are going to and from is also
when others do want to see them.

The split 144.39/.99 digi at Dayton will ONLY hear the people walking
around with their HT's because they are the only ones that will shift to
the +600 offset.  And when their packet is heard byt the digi *without* all
the other Dayton and statewide packets, their probability of getting
digipeated will be many times better.  Then the output of the digi  being
no more than a few hundred feet from everyone at Dayton will capture
every'es receiver so those packets will get more likely to be heard too.

So it is a win/win all around,  AND everyone can still see everything else
going on.

We did it for a running event we have and the persons that went with
the +600 split for their transmit scored 300% better success.

Bob, WB4APR

On Wed, May 1, 2019 at 2:54 PM <chiefsfan2 at cox.net> wrote:

> If you used the split tx/rx you would still have to rx the wall to wall
> meaningless position beacons of of vehicles in the parking lot. If you used
> 144.990 simplex it would hopefully only be portable stations around the
> fairgrounds with a lot less QRM.
> On May 1, 2019, 10:30 -0500, Randy Love <rlove31 at gmail.com>, wrote:
>
> APRS digipeaters usually self-identify. It makes no difference rules wise
> if it digitpeats on the same or different frequencies.
>
> On Wed, May 1, 2019, 11:26 AM John D. Hays <john at hays.org> wrote:
>
>> Wouldn't that be a repeater, with repeater rules?
>>
>> On Wed, May 1, 2019, 08:04 Robert Bruninga <bruninga at usna.edu> wrote:
>>
>>> What we need is for someone to put up a digipeater right at the
>>> fairgrouinds with a NOT-HIGH antenna that takes INPUT on 144.99 and TX's on
>>> 144.39
>>>
>>> Then everone right at the fairgrounds has priority input to the digi,
>>> but everyone still hears everything on 144.39
>>>
>>> THen HT's use normal APRS but with +600 offset.
>>>
>>> bob
>>>
>>>
>>> On Tue, Apr 30, 2019 at 5:50 PM <chiefsfan2 at cox.net> wrote:
>>>
>>>> The past few years I have been at Dayton/Xenia hamvention the main aprs
>>>> frequency of 144.390 has been wall to wall position beacons. If users
>>>> wanted to send situational awareness txt messages using an ht it would be
>>>> very difficult. Hamvention has set up a cell group texting service for cell
>>>> phones that works very well. It seems we are missing a great opportunity to
>>>> use aprs radios for some messaging while on the fairgrounds. I'm not saying
>>>> use aprs exclusively but it would be a good learning tools for aprs txt. I
>>>> wonder if an alternate frequency for aprs ht' to use for txt messages would
>>>> be a good idea? Maybe 144.990 as mentioned on bobs <http://aprs.org>
>>>> *aprs.org* website.
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