Fort Bragg TRS Mystery Signals-Ident Requested

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spacellamaman

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Note: I do realize it is entirely possible that there is no relationship of
of the following to the Ft Bragg system, but the info I have put together
so far tells me it would be an extreme coincidence.
************************************************************************************

This thread will begin as a simple call for assistance in identifying what
I am hearing.

If you have any scanner that covers 380mhz range and are in
the southern piedmont, you will likely be able to receive one or more freq
anywhere you have previously received the Fort Bragg system via the 4
western towers. I will restrain myself from getting too detailed but feel free
to ask any questions. If I state something as fact, without caveats, it is
because I have satisfied myself as to its accuracy and am fully willing to explain,
but for brevity's sake, won't right now.

Four frequencies; first three heard bout 1224hrs on 9/12/16, the fourth
later in the day as I had to change locations to receive from the tower
that I expected at this point to have a similar Tx emanating from.
These frequencies did not have what you will hear on them late Sunday
evening 9/11/16.

Each one has been personally noted as a operational Voice Channel,
one for each of the four western Ft Bragg BSTRS towers. All should
be listened to by dialing in on them conventionally, FM mode, by whatever
method works for you.

386.4875
386.6625
386.8500

388.9625


The towers, as listed in the RRDB, correspond to the NAC codes in numerical
order, so I find it convenient to call the tower by its NAC. There are no
NACs associated with these frequencies currently, or at least using a
PRO668 indicates nothing. I have assigned them NAC codes simply to show
which tower each is coming from so no one will be chasing a signal that is not
within their range. Extensive coverage mapping gives me 99%
confidence as to the accuracy of the frequency/tower pairings.

Freq______Tower associated with
------------- =---------------------
386.4875 =3C7
386.6625 =3C6
386.8500 =3C4

388.9625 =3C5

There has been some testing over the past couple of months and a few new
voice channels have been personally noted on 3C4 and 3C6, the towers I can Rx
best. I assume that 3C7 and 3C5 have new freqs as well, but have yet to discover
them. These towers rarely get much traffic (excepting 3C5 and to a lesser
extent 3C6), though a few times a year it is often intensive. I do know
that the new VCs are in use currently on 3C6. Originally I guessed it was
just a build-out/frequency-expansion, but then all of this popped up Monday.

Also while I am far from certain about this, and will gladly defer to
anyone around the FAY area, I cannot find any similar frequencies that
could be associated with 3C1, 3C2 or 3C3, but think it should be
investigated by someone closer to those towers.

I won't stick my neck out here to even speculate on my conclusion as to
what I am hearing, as what seems obvious to the uninformed could certainly
be wrong, and my neck is already out further than I am comfortable with
just by posting this.

I have been hoping that someone wiser and more experienced would have
already posted about this, but two days seems to be my limit on waiting, so
I kindly request those who are wiser and more experienced than I, which
means basically everyone, who is interested to give them a listen and any
reports back would be much appreciated.
 
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trumpetman

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Bands have been extremely enhanced lately, I wrote those frequencies off as coming from the Ft Benning P25 system as it sounds like a Harris P25 control channel, which I believe that's who built out the Benning system. I only caught them in passing driving up US52 earlier this week, but I've heard the very same frequencies active. With the ducting coming out of N Georgia some signals sound as though they're right next to you.

Sent from my XT1080 using Tapatalk
 

spacellamaman

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man you are fast, i barely refreshed the page

While I understand what you are saying, the 380mhz band has been quite crazy, there there is a reason you heard it so well on US52 that i don't think are due to that. US52 passes very close proximity to one of the towers and slices a diagonal across the coverage area from SE to NW of all four. In anticipation of this situation, so I could satisfy myself, and others, as to my due-diligence, last night I hopped in my car, and shortly thereafter 386.8500 was personally confirmed by aiming the jack of a PRO668, sans antenna, in signal stalker mode at the 3C4 tower. Locked on to both 386.8500 with the new-to-me sounds and 386.4000 $3C4.

And thanks for mentioning the Harris P25 control channel part as I have been trying to find sound samples online that sounded similar and haven't heard that one yet. Are the audible characteristics very similar, if not exact, for different towers in a multi-tower/multi-site Harris P25 system? That's one of the odd things to me is the similarity of audible characteristics from one to the other.
 
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Toad_77

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While I understand what you are saying, the 380mhz band has been quite crazy, there there is a reason you heard it so well on US52 that i don't think are due to that. US52 passes very close proximity to one of the towers and slices a diagonal across the coverage area from SE to NW of all four. In anticipation of this situation, so I could satisfy myself, and others, as to my due-diligence, last night I hopped in my car, and shortly thereafter 386.8500 was personally confirmed by aiming the jack of a PRO668, sans antenna, in signal stalker mode at the 3C4 tower. Locked on to both 386.8500 with the new-to-me sounds and 386.4000 $3C4.

And thanks for mentioning the Harris P25 control channel part as I have been trying to find sound samples online that sounded similar and haven't heard that one yet. Are the audible characteristics very similar, if not exact, for different towers in a multi-tower/multi-site Harris P25 system? That's one of the odd things to me is the similarity of audible characteristics from one to the other.

I realize this post is a few years old but could you share the location of the tower that you mentioned, either a lat/lon or nearby intersection? The GPS coordinates in the database are the same for all the sites and appear to be a guess at best.
 
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