138 - 144 Freq Band

TexScan780D · #1 (**permalink**) 10-30-2009, 08:27 PM

I understand from another website that the 138 - 144 Freq Band is for Federal.

What is the 138 -144 freq. band used for?

Thanks

AlabamaRS · #2 (**permalink**) 10-30-2009, 09:19 PM

It is Military band,primarily is MILAIR, also there are some VHF trunking \sytems around, One at least here in Alabama

FLRAILMAN · #3 (**permalink**) 10-30-2009, 09:39 PM

AlabamaRS is correct & here is some additional info. Any possibility of revealing what website that was?

The World Above 30 MHz

bands of operation for radio amateurs above 30MHZ

http://www.ntia.doc.gov/osmhome/repo.../section3a.pdf

FLRAILMAN

MtnBiker2005 · #4 (**permalink**) 10-30-2009, 10:39 PM

San Clemente Island (NAVY) area off the Southern California Coast. Is a heavy user in that band area. Analog(DCS tones) & P25 repeaters.

autovon · #5 (**permalink**) 10-30-2009, 11:15 PM

Military fighter and other military air-air use in the AM mode.

ecps92 · #6 (**permalink**) 10-31-2009, 09:55 AM

Mil Air [AM and FM modes]
Civil Air Patrol [some new channels, as well as input frequencies]
National Guard Units
US Air Force [Bases, Thunderbirds]
FEMA
USCG Aux
US Navy
MARS - Navy/Marines/Air Force/Army
US Army
State EMA's [vary, but have used this band for Networks]
NASA [143.6250]

In TX my notes indicate for Specific users
National Guard, FEMA, some PX's at Bases, Civil Air Patrol

Quote:

Originally Posted by AlabamaRS

It is Military band,primarily is MILAIR, also there are some VHF trunking \sytems around, One at least here in Alabama

TexScan780D · #7 (**permalink**) 10-31-2009, 10:03 AM

Any idea who might be using 138.270 PL Tone 110.9?

I only heard one transmission which was not useful in telling me whom they might be.

signal500 · #8 (**permalink**) 10-31-2009, 12:25 PM

Quote:

Originally Posted by TexScan780D

Any idea who might be using 138.270 PL Tone 110.9?

I only heard one transmission which was not useful in telling me whom they might be.

Federal Emergency Management Agency

TexScan780D · #9 (**permalink**) 10-31-2009, 12:37 PM

Is there a list of FEMA frequencies that I may download?

AlabamaRS · #10 (**permalink**) 10-31-2009, 01:36 PM

Quote:

Originally Posted by TexScan780D

Is there a list of FEMA frequencies that I may download?

I have a list that is somewhat dated, send me PM with email address & will send that way, Too large to post
Paul

DaveNF2G · #11 (**permalink**) 11-01-2009, 02:19 PM

I believe MARS is vacating/has vacated the 143 MHz range, but there is a local (to me) VHF MARS repeater input in that area.

Gorg69 · #12 (**permalink**) 11-01-2009, 02:39 PM

Milair CAP uses these freqs very often in the Delaware area. Lots of air-air comms between fighter pilots. Interesting conversations....

W9NES · #13 (**permalink**) 11-01-2009, 02:42 PM

Is the 138.270 AM/ NFM/WFM.? Please advise.Thank You

nd5y · #14 (**permalink**) 11-01-2009, 03:53 PM

Quote:

Originally Posted by W9NES

Is the 138.270 AM/ NFM/WFM.? Please advise.Thank You

All the non-air frequencies in the 138-150.8 federal bands should be NFM or digtial and are now supposed to be on 12.5 kHz spaced channels (138.0125 138.025 138.0375 ...) so 138.270 is probably really 138.275. AM air channels as far as I know are all on 25 kHz spaced channels (138.0 138.025 138.05 ...)

If you Google "FEMA frequencies" you will get several lists. I don't know how accurate they are.

W9NES · #15 (**permalink**) 11-01-2009, 05:04 PM

Thanks Signal 500 for the pm and the infomation on FEMA.

ecps92 · #16 (**permalink**) 11-01-2009, 05:37 PM

If he got PL then it's FM not AM

Not sure where the report of 12.5 Khz came from, but many are moving to Narrowband, on exisiting frequencies not migrating to a 12.5 Khz channel plan..

Quote:

Originally Posted by W9NES

Is the 138.270 AM/ NFM/WFM.? Please advise.Thank You

ecps92 · #17 (**permalink**) 11-02-2009, 07:56 PM

Dave what do you have out your way for MARS usage.

New England has an extensive linked network, there was rumor that NY [your area] was linked in, but we have not heard [monitored] anything to confirm this.

Framingham, MA 148.3750
Sandwich, MA 148.3500
Cummington, MA ?????
Warren, MA 150.4000
Goshen, CT 148.3750
Groton, CT 149.3750
Rocky Hill CT ????

Rumor was in NY
Rochester, Albany, Stanford, Greenburgh and Dobbs Ferry

We can start another thread if needed

Quote:

Originally Posted by DaveNF2G

I believe MARS is vacating/has vacated the 143 MHz range, but there is a local (to me) VHF MARS repeater input in that area.

CqDx · #18 (**permalink**) 11-02-2009, 08:27 PM

Like ecps92 mentioned, I have heard US Navy warships on 139MHz in P25 mode during Fleet Week New York

US Military Academy at West Point, NY has a P25 Trunked system in 138-139 MHz

Lakehurst Naval Weapon Station has comms on 143 MHz in analog FM.

jks19714 · #19 (**permalink**) 11-04-2009, 03:29 PM

Quote:

Originally Posted by DaveNF2G

I believe MARS is vacating/has vacated the 143 MHz range, but there is a local (to me) VHF MARS repeater input in that area.

You are incorrect. We have been effected by narrowbanding, although we have been give "pairs" of adjacent narrow-band frequencies to utilize. There are fewer of them, so we have to use PL a lot more than we used to and had to QSY a lot of repeaters.

DaveNF2G · #20 (**permalink**) 11-05-2009, 12:13 PM

Ahh, OK. Thanks for the update and correction. Much appreciated.