[FedCom] REF: 138.925

Thu Oct 9 20:21:47 EDT 2008

Hi Larry, thanks for clearing that question up for me here in Harrisburg. I 
have heard the signals on 138.925 here for some time.
It's a data signal with a pulse every 2.5 seconds and a double pulse every 
couple minutes or so. I live just across the local river from New 
Cumberland Army Depot (ddre) so I figure this where the signal is coming 
from. A couple years back I had a similar sounding signal right on 
50.000mhz, a pulse every second and a double pulse every two minutes. This 
signal disappeared about  two and half years ago never to return, still 
don't know what it was or where it was from. again thanks

Chuck Sayers
Harrisburg Pa.
WA3GSI
FN10og

  At 04:01 AM 10/9/2008, you wrote:
>Send FedCom mailing list submissions to
>         fedcom at mailman.qth.net
>
>To subscribe or unsubscribe via the World Wide Web, visit
>         http://mailman.qth.net/mailman/listinfo/fedcom
>or, via email, send a message with subject or body 'help' to
>         fedcom-request at mailman.qth.net
>
>You can reach the person managing the list at
>         fedcom-owner at mailman.qth.net
>
>When replying, please edit your Subject line so it is more specific
>than "Re: Contents of FedCom digest..."
>
>
>Win a new Icom IC-756PROIII and help QSL/QTH.net
>Details at: http://mailman.qth.net/index.html
>
>
>Today's Topics:
>
>    1. Re: Re: 138.925 (Larry Van Horn)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Wed, 8 Oct 2008 05:55:18 -0400
>From: "Larry Van Horn" <n5fpw at brmemc.net>
>Subject: Re: [FedCom] Re: 138.925
>To: <fedcom at mailman.qth.net>
>Message-ID: <338FB588ADC145FCAE0B01D809DEB8AA at LarryVanHornPC>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>         reply-type=original
>
> > Anyone have any ideas?
> > (Not guesses. Any AF vets in the group?)
>
>As documented in MT's Fed Files column several years ago and also in my
>eBook - The Federal Freq Directory, 138.925 is a nationwide assignment and
>it is a DoD Fire/LE Alarm System data frequency. There are a few oddball
>voice assignments on this one including some renegade AF A-A intercepts, but
>this should for the most part hold up natwionwide.
>
>The allocation in Portland is a hard and confirmed "Fire Alarm: assignment
>and this is based on a more current look at the notes field from a GMF that
>is more current than the last one that was available in the public domain
>(1984).
>
>Under the new DoD VHF LMR bandplan this assignment will not change from its
>present status. To much money invested in the infrastructure at this point
>to change freqs.
>
>As for 139.875, while I have nothing for Portland specific, I have seen
>several assignments on this frequency for Crash Barrier Control-Data Systems
>(aka runway arresting cable system) at various AF installations across the
>country. While I would not consider that a nationwide assignment, there are
>enought on this freq to suggest this as a possible source of your signal.
>
>If I remember correctly Portland Intl uses an arresting gear system on
>runway 10R/28L that is operated from the control tower (remotely). I believe
>it is either the BAK-12 or BAK-14 system that we had at several of the bases
>I was assigned to. Those systems are remotely controlled via a VHF LMR
>frequency (at least that was what the maintenance manual that I looked at
>briefly back in the early 90s at NAS New Orleans indicated).
>
>Larry Van Horn, N5FPW
>Brasstown, NC USA
>MT Assistant/Review Editor
>Milcom/What's New Columnist
>
>----- Original Message -----
>From: <gfdubois at juno.com>
>To: <fedcom at mailman.qth.net>
>Sent: Tuesday, October 07, 2008 5:42 PM
>Subject: [FedCom] Re: 138.925
>
>
> > Speaking of weird signals, I could use some help with one.
> >
> > There has been a digital signal on 138.925 coming from the ANG base at
> > Portland International for decades now.
> > According to the IRAC database, it is a fixed station transmitting with
> > ten watts. I always assumed it had
> > something to do with a/c navigation, but I don't think so. For one, we
> > have gone through three different aircraft in the
> > last 30 years, and it's still there. And we have a TOD generator, on
> > 397.0.
> > The "Special Notes" code is S361, which means "multiple transmitting
> > and/or receiving stations operating at fixed locations..."  But
> > everything the ANG owns is at Portland Arpt. (Or Klamath Falls, in
> > southern Oregon.) And the signal is always the same strength.
> >
> > If you listen to it, it transmits at irregular intervals.
> >  http://mywebsite.mysite.com/files.html
> > (There's another one on 139.875 that's been there for the last ten years
> > or so. I have no idea what that one is either.)
> >
> > Anyone have any ideas?
> > (Not guesses. Any AF vets in the group?)
> >
> > Thanks.
> >
> > George DuBois
> >
> >
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > FedCom mailing list
> > FedCom at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/fedcom
>
>
>--------------------------------------------------------------------------------
>
>
>
>No virus found in this incoming message.
>Checked by AVG - http://www.avg.com
>Version: 8.0.173 / Virus Database: 270.7.6/1714 - Release Date: 10/8/2008
>7:01 AM
>
>
>
>------------------------------
>
>_______________________________________________
>FedCom mailing list
>FedCom at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/fedcom
>
>
>End of FedCom Digest, Vol 57, Issue 2
>*************************************
>
>
>---
>avast! Antivirus: Inbound message clean.
>Virus Database (VPS): 081008-1, 10/08/2008
>Tested on: 10/9/2008 4:02:36 AM
>avast! - copyright (c) 1988-2008 ALWIL Software.
>http://www.avast.com