418.3375?

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ScubaJungle

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I've been trying to figure out who is using this frequency but I always catch the end of a transmission or just don't hear anything.
I know its wide-area, common-use federal, and I think it may be a repeater from what Ive found online, but does anyone have any more info on what agency would be using this?
Also, which I found kind of strange, is its DMR. All the other federal stuff around here is P25 or analog.

Tampa Bay Area
 

ScubaJungle

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I'll bet on USPS sorting facility, they are known to use DMR across the country in the 400mhz range.
Good idea, I forgot to consider that. I'm keeping it on with DSD+ for as long as I can to see if I can some voice activity, but there's not much. If its USPS maybe I should try early morning for sorting.
 

RaleighGuy

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Overnight or early morning. Not so much mailman sorting but bulk sorting to send out to other facilities. You typically hear operations on one TG/slot and maintenance on the other.
 

w2lie

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What area are you in? I recently logged what is probably a USPS Sorting facility on 408.3375 in the NYC area.
 

ScubaJungle

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In Tampa area, and its possible, but Im leaning towards USPS due to what the two normally use in this area.

Ive never been able to get any voice - just the DMR noise and once in a while slot 1 and 2 will become active, but its either encrypted or I dont know.
 

Ranger0034

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ScubaJungle, I'm an avid Fed listener here in St Petersburg, I'll listen in to see if it's ENC or not.
I also have a good sized list of all the "active"* Fed channels here in the Tampa Bay area. I have my Home Patrol on record all the time.
*Active means activity heard at one time or another, but not all consistently active.
 

Remington12G

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More than likely USPS, Here in Lexington, KY. They use 1 frequency, 1 talk group, both slots. 1 Slot for Docks/Trucks/Sorting & the other slot for Admin/Maintenance. Like @N1GAW said they are known to use DMR across the country. I've never heard them use encryption on DMR only on P25 postal inspector channels.
 

Hooligan

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One potential reason you're only hearing it intermittently is because it could be an input freq, so the first thing to check would be -9MHz -- 409.3375. Especially if it's a DMR (meaning relatively new - past 10 years or so) system, it's likely to be following the federal UHF spectrum planning convention of the UHF repeater input being 9.0MHz above the output.

Also, I occasionally get some intermod or images in the 410-420MHz spectrum from a nearby business that has a 900MHz DMR Capacity+ system.
 
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