Mode Question Re 39.560 and 123.0 MHz ?
 

Hello:

new at his.

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
123.000

The 123.0 one is particularly perplexing for me, as I thought that puts it
in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use AM
rather than fm ? Why, if so ?

Thanks,
B.

Mode Question Re 39.560 and 123.0 MHz ?
 

Normally 39.560MHz would be FM mode, and 123.000MHz would be AM mode. What
are you hearing on 123.000MHz?

Bill Crocker



"Robert11" wrote in message
. ..
Hello:

new at his.

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
123.000

The 123.0 one is particularly perplexing for me, as I thought that puts it
in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use
AM rather than fm ? Why, if so ?

Thanks,
B.

Mode Question Re 39.560 and 123.0 MHz ?
 

On Mon, 13 Feb 2006 08:19:24 -0500, "Robert11"
wrote:

Are the modes fm for Both, or... ?

39.560 MHz

FM

123.000

AM

The 123.0 one is particularly perplexing for me, as I thought that puts it
in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use AM
rather than fm ? Why, if so ?

If they're using it for anything but aeronautical use (or
aeronautical-related - airport maintenance, fire, etc.), they're doing
so illegally.

From OP: Mode Question Re 39.560 and 123.0 MHz ?
 

Hi Bill:

Frankly mainly noise, but occasionally some garbled conv. irrespective of
whether I have fm or AM set.

Guess I'll just forget about it.
Was only curious.

Thanks for help, and all the past help.

Bob

-----------------
"Bill Crocker" wrote in message
...
Normally 39.560MHz would be FM mode, and 123.000MHz would be AM mode.
What are you hearing on 123.000MHz?

Bill Crocker



"Robert11" wrote in message
. ..
Hello:

new at his.

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
123.000

The 123.0 one is particularly perplexing for me, as I thought that puts
it in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use
AM rather than fm ? Why, if so ?

Thanks,
B.

From OP: Mode Question Re 39.560 and 123.0 MHz ?
 

Montag, 13. Februar 2006 09:45 (US Central Time)
Robert11 wrote in rec.radio.scanner:

Hi Robert,

Frankly mainly noise, but occasionally some garbled conv. irrespective of
whether I have fm or AM set.

123.0 suggests that it is somewhat airport/aviation related and should be
AM. If You can`t get a clear signal, it also could be something else, like
a tv or radio station ... over here at EDS I sometimes hear a radio
transmission that gets over the tower freq (depending on the weather and
where I am located).

Talk to You later ... Hans from Germany
--
2006/02/13 16:50
EDDS 131650Z 14003KT 9999 FEW022 SCT250 M00/M05 Q1021 NOSIG

Mode Question Re 39.560 and 123.0 MHz ?
 

In article ,
says...
Hello:

new at his.

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
123.000

The 123.0 one is particularly perplexing for me, as I thought that puts it
in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use AM
rather than fm ? Why, if so ?

Thanks,
B.



The mode for 39.560 is narrow FM, or on most scanners, just FM.

The mode for 123 is almost certainly AM, in the Aircraft band. A lot of
comms on the Air band are very hard to understand. Between the weird
jargon, and the people eating the mike when they talk, and the limited
bandwidth, sometimes it's a guess as to what they are saying.


You should be able to find a freq list for your area, and it will tall
you what it is exactly. Check at Radio Shack, for a freq list, or just
do search for whaevertown scanner freqs or whatevercounty scanner freqs,
and you should find a lot.


Also, lots of good info at..

http://www.strongsignals.net/index.cgi


BDK

Mode Question Re 39.560 and 123.0 MHz ?
 

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
FM probably your local police mobiles so they can talk to your local
Sheriff.


123.000
AM Does your local town own the airport? This sounds like service
vehicles or fire trucks that have to go onto the active runway and taxiway
areas of the airport.
If you have to go out onto an active runway YOU MUST GET CLEARANCE FROM THE
CONTROL TOWER BEFORE YOU ENTER OR CROSS AN ACTIVE RUNWAY particularly
per
The 123.0 one isp erplexing for me, as I thought that puts it in the
middle of the AM band,
which I always thought would be just for aero.

Would a Town service use AM
rather than fm ? Why, if so ?

All 118- 136 MHz AERO frequencies are AM.

Dan Yemiola
AI8O

Mode Question Re 39.560 and 123.0 MHz ?
 

In article ,
"Robert11" wrote:

Hello:

new at his.

Found the following freq's that apparently my town utilizes.

Are the modes fm for Both, or... ?

39.560 MHz
123.000

The 123.0 one is particularly perplexing for me, as I thought that puts it
in the middle of the AM band,
which I always thought would be just for aero. Would a Town service use AM
rather than fm ? Why, if so ?

Thanks,
B.


Are you sure the 123.0 is a frequency? If it is then it is probably
related to an airport in the area.

There is another possibility however" 123.0 is a valid PL tone, if the
listing you found the 39.56 freq from relates the two that might be the
case.

Often freqs with PL tones are listed as "39.560 (123.0)" or some similar
format.

PL is a form of sub-audible signaling used to reduce interference and
control access to radio systems. Several models of scanners utilize PL
features for the same purposes. It may also be referred to by other
trade names as well as CTCSS.