[Scan-DC] 148.6250 traffic

[bruce.carpenter at earthlink.net]

Thanks to all who have responded. 

It is reported that this traffic is NB FM.  No calls or other ID except one transmission was from Prince Georges Co FD directed to DC FD but only one side of the conversation was heard.   Some of the traffic is simplex and sounds like business activities regarding supplies and availability of products.  No ID or location information heard.  The other is public safety related and is a repeater output.  Unknown about DCS or CTCSS.   

One respondent related that per NTIA allocation table this is an Air Force ground to air and air to air frequency used in the CONUS.  Air Force and Army MARS members relate that this is not a MARS frequency and has not been for the last many years.  One has been an Army MARS member for over 50 years and reports that was never known as a MARS frequency.  An Air Force MARS member for many years relates the same.   

No one who responded reported hearing any activity on 148.6250 and I have not heard any here in Dayton, Howard County, Maryland.  

My suspicion is that the traffic being heard has a two-fold origin.  One being unlicensed business activity in the localized area around Haymarket Virginia.  The other being intermodulation products that may result from the large number of RF sources in the area, especially on Bull Run Mountain.  

Thanks again for your thoughts and I hope everyone has a very enjoyable Holiday.  

73
Bruce, W3YVV
President: The Mid-Atlantic Repeater Council  (TMARC.ORG)

-----Original Message-----
From: ~Bill <ecps92 at earthlink.net> 
Sent: Saturday, December 20, 2025 9:01 AM
To: Scan-DC at mailman.qth.net
Cc: Bruce.Carpenter at earthlink.net; 'Alan Henney' <alan at henney.com>
Subject: RE: [Scan-DC] 148.6250 traffic

It is or was a MARS allocation, but that is/was from the Pre 9/11 era

Checking the 2021 NTIA FOIA Dump it is listed as Air Force - IntraTeam, Air-Air, Air-Ground - CONUS Ops

Any PL/DPL in use ???
Bill - N1KUG
Boston, Mass
Cruise Ship Frequencies
http://scanmaritime.com/


-----Original Message-----
From: scan-dc-bounces at mailman.qth.net [mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of Scott KB3JQQ via Scan-DC
Sent: Saturday, December 20, 2025 12:15 AM
To: scan-dc at mailman.qth.net
Subject: Re: [Scan-DC] 148.6250 traffic

Isn't that MARS?

On 12/20/2025 12:08 AM, Alan Henney wrote:
> Can anybody help with this?
>
> Is this a common Cheap Chinese Radio freq?
>
> Thanks,
> Alan
>
>
> On Fri, Dec 19, 2025 at 6:41 PM <bruce.carpenter at earthlink.net> wrote:
>
>> Hearing traffic on 148.6250 that sounds more like a government 
>> contractor doing some kind of installation or upgrade.  Lots of 
>> discussion about materials availability.  Heard between Haymarket and 
>> Leesburg VA.  Any idea what service this might be?  Any information 
>> would be appreciated.  Don’t see a listing in the Scanner Almanac from June 2010 for that frequency.
>>
>>
>>
>> Thanks
>>
>> Bruce Carpenter, W3YVV
>>
>> Bruce.Carpenter at earthlink.net
>>
> ______________________________________________________________
> Scan-DC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/scan-dc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Scan-DC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html

______________________________________________________________
Scan-DC mailing list
Home: http://mailman.qth.net/mailman/listinfo/scan-dc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Scan-DC at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html