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Old 01-23-2010, 10:29 AM
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Default 389.4875 San Antonio

QTH: Near San Antonio
BCD396T w/ 2 meter/440 dual band vertical on roof

Found this control channel while searching the 380-400 MHz military land mobile band this morning during the tropo opening (Mexican stations in that range are good indicators of north/south tropo openings from my area). Any ideas?

389.4875 mhz FM
SID: 004Bh0-0202
WACN: 86392
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Old 01-23-2010, 2:50 PM
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Unidentified Military P25 04B-86392
http://www.radioreference.com/apps/db/?sid=6575
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Old 01-24-2010, 1:17 PM
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Fox hunting this signal indicates the strongest reception is found at a point northbound on the Loop 410 access road between Military Dr and Culebra Rd. Signal levels drop on Culebra Rd. Signal levels drop on Military Dr. Signal levels drop west of 410.

Based on this, it appears the most likely location of the transmitter is Southwest Research Institute. I am not one who passes fences, "NO TRESPASSING" signs and guarded gates so that is as far as I go.

Map of location: culebra road, san antonio - Google Maps
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Old 01-24-2010, 1:24 PM
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I'd bet it is the new NSA Data center / Facility that is being built in the old Sony plant at 410 and Military
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Old 01-25-2010, 9:52 AM
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I live close to there and will do some monitoring.
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Old 01-29-2010, 9:42 PM
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Default Here is the source...

From KENS 5

Uncle Sam jamming SA garage door openers | kens5.com | San Antonio News, Local News, Breaking News, Weather | News
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Old 01-30-2010, 7:21 AM
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I noticed yesterday the system was off the air... interesting. Well, that confirms it is for the NSA site there....
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Old 01-30-2010, 11:03 AM
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I wonder how many instances of Unitrunker will be running on March 1st?
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Old 02-25-2010, 5:21 PM
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And today, from WOAI.COM

Emergency transmissions may cause household electronics to malfunction | WOAI.COM: San Antonio News

The end is near! Or at least the interference blackout will be. Let the calamity ensue....

~S~
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Old 03-03-2010, 11:55 AM
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System back online yet ?


Found some other link from this page http://www.cryptome.org

NSA response to LMR Antenna in San Antonio, Texas
The newly installed Land Mobile Radio (LMR) antenna is operating in the authorized FCC military frequency band for use by construction and security personnel at the site. The National Security Agency has been in contact with the City Council, the Mayor's office, and the FCC. Even though, the LMR antenna is operating appropriately in its assigned band, it was turned off for approximately 30 days to allow residents and vendors the opportunity to address and rectify the matter. Consumers experiencing interference should contact the manufacturer of the door opener control or their local installer for information on available immediate solutions.
http://www.nsa.gov/public_info/press_room/index.shtml
------
Release Date: January 29, 2010
Office of District 6 Councilman Ray Lopez: 207-7065
Councilman Lopez updates District 6 residents about malfunctioning garage doors

http://www.sanantonio.gov/news/NewsM...bilegarage.asp
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Old 03-09-2010, 5:13 PM
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Yes, they are broadcasting control channel on 385.0125.
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Old 03-09-2010, 9:36 PM
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So if its NSA, do you really think you'll actually hear anything on it?
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Old 05-07-2010, 1:23 PM
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Talkgroups 1151, 1153, 1157 with encrypted comms.
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Old 08-30-2010, 2:07 AM
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Some photos of where this trunked radio system is located

NSA San Antonio Cryptological Center - Birdseye
http://cryptome.org/eyeball/nsa-sana...sanantonio.htm
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Old 02-11-2012, 11:59 PM
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[New photos]

National Security Agency San Antonio TX 2012
http://cryptome.org/2012-info/nsa-sa...sa-sa-2012.htm
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Old 02-13-2012, 4:54 AM
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SATX NSA National Data Center P25 TRS
Frequencies:
1) 385.012500 (CC)
2) 387.175000
3) 389.487500

Talkgroups
NSA-DC Security.... 1103 (Heard non-encyrted Security related Comms and also encr comms)
Un-ID NSA TG1151 1151
Un-ID NSA TG1152 1152
Un-ID NSA TG1153 1153
Un-ID NSA TG1157 1157
New Talkgroup ID Wildcard
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Last edited by Michael-SATX; 02-13-2012 at 4:56 AM..
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