Federal NAC's
- Thread starter trashman43
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KB7MIB
Member
A couple of weeks ago, I took a drive on I-10 westbound from the Phoenix, AZ area to a rest stop west of Blythe, CA, then back home.
As I crossed the Colorado River, I switched my scanner to scan the pre-programmed Marine VHF band.
There was a P-25 transmission on 162.000 (Ch 28 Shore side of the ship-to-shore telephone channel) with a NAC in the 300 range. 380 I *think*.
Would anyone have any guess, or actual knowledge, of what system or other transmission I was hearing?
I only heard it while on the bridge. I didn't hear it on the approach, and I lost it again on the California side.
I didn't look for it on the return trip.
John
Peoria, AZ
As I crossed the Colorado River, I switched my scanner to scan the pre-programmed Marine VHF band.
There was a P-25 transmission on 162.000 (Ch 28 Shore side of the ship-to-shore telephone channel) with a NAC in the 300 range. 380 I *think*.
Would anyone have any guess, or actual knowledge, of what system or other transmission I was hearing?
I only heard it while on the bridge. I didn't hear it on the approach, and I lost it again on the California side.
I didn't look for it on the return trip.
John
Peoria, AZ
AZDon
Member
Nac
Oldest federal law enforcement agency in the country is the US Postal Inspection Service, interesting radio system. all NAC codes are 468. Their radios operate on one channel plan and can be used anywhere in the country. By the way all of their UHF comms are always encrypted. Might take a look at their web site. Many of the Inspectors have local and state radios installed in their vehicles. Known as the silent service and do use their radios a fair bit on their simplex channels. They do not have talkaround on the repeater channels. Postal Police Officers operate on the same repeater channels as the Inspectors but the Postal Police do not have the tac channel on their radios. Most or their radios systems are wide area systems consisting of repeaters and receivers that are linked by leased phone lines. They simulcast their repeaters with Trax GPS clocks for true simulcast transmissions.
Postal OIG also operate on the Inspectors radio systems so you never really know who is communicating, OIG, PPO or PI.
Oldest federal law enforcement agency in the country is the US Postal Inspection Service, interesting radio system. all NAC codes are 468. Their radios operate on one channel plan and can be used anywhere in the country. By the way all of their UHF comms are always encrypted. Might take a look at their web site. Many of the Inspectors have local and state radios installed in their vehicles. Known as the silent service and do use their radios a fair bit on their simplex channels. They do not have talkaround on the repeater channels. Postal Police Officers operate on the same repeater channels as the Inspectors but the Postal Police do not have the tac channel on their radios. Most or their radios systems are wide area systems consisting of repeaters and receivers that are linked by leased phone lines. They simulcast their repeaters with Trax GPS clocks for true simulcast transmissions.
Postal OIG also operate on the Inspectors radio systems so you never really know who is communicating, OIG, PPO or PI.
ecps92
Member
I've heard them on $482 across much of the country on not just one frequency.
406.3375, 407.1375, 407.7250, 407.7750, 409.9375 (Most Common)
What is the One Common Freq you indicate they use ??
406.3375, 407.1375, 407.7250, 407.7750, 409.9375 (Most Common)
What is the One Common Freq you indicate they use ??
ecps92
Member
I would venture, maybe an image ?? from the higher side of 170-174 ??
What make/model of Scanner ??
What make/model of Scanner ??
KB7MIB
Member
KB7MIB
Member
I'm going to have to try these frequencies specifically, but there's a bit of DMR (MotoTRBO) use in the UHF federal band in Phoenix, which has been said to be the USPS. I had assumed that this included the inspectors, etc.
John
Peoria, AZ
ecps92
Member
TRBO is likely the Processing and Sorting Facilities
A Few other Agencies are also known to use TRBO the FRB, VA, FAA
A Few other Agencies are also known to use TRBO the FRB, VA, FAA
ecps92
Member
My 600 regulalry is hit with images from the 152/154 range when serching the 162-174
Do you have any Public Safety in your area using P25, with a similar NAC? on a 150-159 Freq ? Just a WAG
Do you have any Public Safety in your area using P25, with a similar NAC? on a 150-159 Freq ? Just a WAG
AZDon
Member
Postal Nac
Postal Inspectors always use 482 for a NAC code and they do not use turbo. Many large Postal Service mail sorting plants use turbo and some plants radio systems are linked together via internet in the event maintenance needs to quickly locate parts for their sorters. The Post Office has tons of VHF and UHF radio communications. By the way the Post Office supervisors and all Inspection Service UHF portable and mobile radios do have a common UHF narrowband analog frequency (414.3625) that they can communicate.
If we are moving away from NAC code discussion lets move over to fed or Private Message me.
Postal Inspectors always use 482 for a NAC code and they do not use turbo. Many large Postal Service mail sorting plants use turbo and some plants radio systems are linked together via internet in the event maintenance needs to quickly locate parts for their sorters. The Post Office has tons of VHF and UHF radio communications. By the way the Post Office supervisors and all Inspection Service UHF portable and mobile radios do have a common UHF narrowband analog frequency (414.3625) that they can communicate.
If we are moving away from NAC code discussion lets move over to fed or Private Message me.
AZDon
Member
Oh forgot, PIs do make some use of different nac codes such as 293 294 295 on their 414.750 simplex channel and we are on the fed forum, my bad.
DeeBotchery
Member
- Joined
- Apr 2, 2008
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I also picked up that one and two others last year from Desert Center, 50 miles west of Blythe. My scanner showed them as:
161.935 NAC390 SYS393 R001 S025
162.000 NAC390 SYS393 R001 S022
162.250 NAC390 SYS393 R001 S023
System-393 returns to the Riverside County Public Safety Enterprise Communication Project (PSEC) http://www.radioreference.com/apps/db/?sid=7001
KB7MIB
Member
That's probably what I heard, thank you.
I wonder why they're using those frequencies in addition to the 700 MHz band? But that's a question for the California forum, I suppose.
Thanks again.
John
Peoria
KB7MIB
Member
I know it's not the VA, I've parked in the park behind the hospital and listened to them. I don't know if the FRB has a location in the Phoenix area. The FAA could be a possibility, of course, with Sky Harbor International here.
John
Peoria, AZ
ecps92
Member
kd7mxi
Member
bullhead/laughlin / 172.4625 = nac526 / 172.4375 = nac167 /
KB7MIB
Member
kd7mxi
Member
nac 526 is lake mohave rangers i think
ecps92
Member
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