Unknown UHF - ENC 451.80000

spacellamaman

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The thread that won’t die. :p
Well, with all due respect and deference, KevinC, Good Mysteries rarely die, and any Mystery that is an ongoing event, as this one is, evidenced by N4GEX and the Duderino's reports, I think qualifies as a Good one.

Until the mystery is solved or dies from a natural death of disinterest, I'll be a pest about it. Seems simpler to keep it all in one thread :)

And this one is driving me nuts!
 

Flyham

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Brief blip of activity caught again this evening around 9:30. 451.800 p25 still secured with RIDs in the 900XXX range. Also some hits on VHF on 158.400 also p25 encrypted with similar IDs. Not sure if related, but at the same time a couple military Beechjets-400 ( T-1A) Jayhawks were doing touch n goes at Greensboro with one mentioning on GSO Approach 124.350 that he a few more approaches then would be going to Myrtle Beach. Coincidence, who knows?

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BigLebowski

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Brief blip of activity caught again this evening around 9:30. 451.800 p25 still secured with RIDs in the 900XXX range. Also some hits on VHF on 158.400 also p25 encrypted with similar IDs. Not sure if related, but at the same time a couple military Beechjets-400 ( T-1A) Jayhawks were doing touch n goes at Greensboro with one mentioning on GSO Approach 124.350 that he a few more approaches then would be going to Myrtle Beach. Coincidence, who knows?

View attachment 141328
Not sure where exactly you are located but from about 2030-2130 in Greensboro 451.800 was just about non-stop and full-scale. All secure, and 3 radio ID's.. 9002131, 9003034, and 9041031. Then it abruptly stopped. Didn't coincide with anything going on locally.
 

spacellamaman

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Yeah until we have more clues, we definitely need to avoid having blinders on.

I'm still waiting to read in the newspapers one day about the Sinaloa Cartel managing to install its own network piggybacking off of the current infrastructure in some manner.
 

RFI-EMI-GUY

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There are suspicious licensees all over NC that are potentially NGO's AKA Blackwater subs or wanna bees. Don't be fooled by the emission designators being MotoTrbo because we all know they will bring what they got.

From the first page(s) of this two year old thread.




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spacellamaman

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Alright guys, interested to hear if anyone picks up anything interesting relating to the mystery biz band encrypted freqs over the next couple of weeks. Like increased activity etc.

 

spacellamaman

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Interesting. I don't recall, was that NAC common?

I am def wanting to see if there is any correlation with the exercise. My default guess is it is not due to my always being smack in the middle of it, but supporting contractors also seems possible. Things have slackened a bit in recent years, dropping the exercise from 8x a year to 6, and now back the historical norm of four.
 

BigLebowski

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It always used to be NAC 167 and was strong in this area. I have recently seen NAC 1 and a couple of times NAC A87, but it is very weak like another site is transmitting or the site was moved. Still always encrypted, whoever it is has excellent encryption discipline as i've only heard it in the clear one time a few years ago with an aircraft.
 

spacellamaman

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It always used to be NAC 167 and was strong in this area. I have recently seen NAC 1 and a couple of times NAC A87, but it is very weak like another site is transmitting or the site was moved. Still always encrypted, whoever it is has excellent encryption discipline as i've only heard it in the clear one time a few years ago with an aircraft.

Oh, so you think the tx's were from a fixed location/base station/tower and not mobile to mobile then? Forgive me if this has been mentioned and I have just forgotten.

Interesting about the aircraft being in the clear. Some of the more disciplined agencies with regard to encryption I have noted in the clear when doing air to ground operations as well. Do you remember much in the way of details with regard to what you surmise the air operations were up to, like an educated guess?

Not that it is likely even relevant, but are biz band freqs even allocated for air ops?
 

BigLebowski

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I’ve always thought it was a repeater on 451.800 based upon the consistent signal strength.

When I heard it in the clear I’m not sure what they were doing, it was just obviously an aircraft based upon the traffic. That was during the height of the riots in 2020.
 

Flyham

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Oh, so you think the tx's were from a fixed location/base station/tower and not mobile to mobile then? Forgive me if this has been mentioned and I have just forgotten.

Interesting about the aircraft being in the clear. Some of the more disciplined agencies with regard to encryption I have noted in the clear when doing air to ground operations as well. Do you remember much in the way of details with regard to what you surmise the air operations were up to, like an educated guess?

Not that it is likely even relevant, but are biz band freqs even allocated for air ops?
I can only surmise (assumes first cousin) that in certain air op scenarios, anything goes. Wasn't it Flying Alaska (or similar) where they would have Maritime VHF 88 onboard the aircraft? Of course that's Alaska and things are way different (right or wrong is debatable).
 

BigLebowski

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451.800 remains dead but the 469.550 $167 was active again yesterday in Greensboro according to the recordings on my 536. All enc with only 9003101 heard.
 

Flyham

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451.800 remains dead but the 469.550 $167 was active again yesterday in Greensboro according to the recordings on my 536. All enc with only 9003101 heard.
As of lately, I haven’t given this much thought. Lack of time and extra life happenings, but today I decided to check the forums and take a listen while making a run to Greensboro. Sure enough 451.800 was heard briefly this afternoon in Greensboro, but with a new, to me, NAC of 001. Also in the same timeframe a brief blip on 158.400, NAC 167. All this seemed to be occurring while I was in the area of W Friendly & Pembroke between Chic Fil A and Wesley Long Hospital.
 

spacellamaman

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As of lately, I haven’t given this much thought. Lack of time and extra life happenings, but today I decided to check the forums and take a listen while making a run to Greensboro. Sure enough 451.800 was heard briefly this afternoon in Greensboro, but with a new, to me, NAC of 001. Also in the same timeframe a brief blip on 158.400, NAC 167. All this seemed to be occurring while I was in the area of W Friendly & Pembroke between Chic Fil A and Wesley Long Hospital.

Ya know I keep threatening to make a dedicated road trip for this little mystery.... Dagnabitt.


Thanks for the report and precise Rx location.
 
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