Loading Hill Air Freqs

Status
Not open for further replies.

bneilson

Member
Joined
Aug 2, 2004
Messages
962
Reaction score
90
Location
Salt Lake County, Utah
When you say it won't import what do you mean? Is it importing with an error, or is it not importing at all?

In THIS THREAD we were talking about the errors people get when importing the Federal system. My personal experience is that it will import with an error but work just fine. The thread explains the error and what is needed to correct it.

Please provide more detail on what you are or are not seeing on your end...
 

737mech

Member
Premium Subscriber
Joined
Aug 14, 2006
Messages
2,568
Reaction score
628
Location
Clark County, NV.
importing trouble

When you say it won't import what do you mean? Is it importing with an error, or is it not importing at all?

In THIS THREAD we were talking about the errors people get when importing the Federal system. My personal experience is that it will import with an error but work just fine. The thread explains the error and what is needed to correct it.

Please provide more detail on what you are or are not seeing on your end...

Ok here's my steps
File/Webimport/radioreference.com/start
United States/Utah/Davis/show imput freqs
categories/ 1- Federal
Sub catagory:51111 0-military in davis county
Nothing here to import??
I want to import the freqs on this page http://www.radioreference.com/apps/db/?aid=5576
Not the trunked system, the VHF and UHF airbands that the fighters use.
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,741
Reaction score
1
Location
Eclipse, Virginia
Ok here's my steps
File/Webimport/radioreference.com/start
United States/Utah/Davis/show imput freqs
categories/ 1- Federal
Sub catagory:51111 0-military in davis county
Nothing here to import??
I want to import the freqs on this page http://www.radioreference.com/apps/db/?aid=5576
Not the trunked system, the VHF and UHF airbands that the fighters use.
After Utah ignore County pulldown. Instead, go to pulldown Agency list for state of Utah, then select Military. I got 211 frequencies.
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,741
Reaction score
1
Location
Eclipse, Virginia
As stated, my import is 211 frequencies, but noted many in 200 - 300 range are FM. Wonder why the database has them that way?
 

theaton

Member N7VU
Database Admin
Joined
Sep 17, 2004
Messages
896
Reaction score
188
Location
Moab, Utah
AM or FM?

As stated, my import is 211 frequencies, but noted many in 200 - 300 range are FM. Wonder why the database has them that way?
FM is the default for new entries. I know both AM and FM are used in the Military Air Band (usually within various sub-bands). I can change these if I know which ones to change (or all of them).

-Tim
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,741
Reaction score
1
Location
Eclipse, Virginia
FM is the default for new entries. I know both AM and FM are used in the Military Air Band (usually within various sub-bands). I can change these if I know which ones to change (or all of them).

-Tim

Thank you Tim,
225 - 380 MHz is all AM. 138 - 144 is mostly FM.

A few clues in this RR Wiki
 

theaton

Member N7VU
Database Admin
Joined
Sep 17, 2004
Messages
896
Reaction score
188
Location
Moab, Utah
Thank you Tim,
225 - 380 MHz is all AM. 138 - 144 is mostly FM.

A few clues in this RR Wiki
I checked my Yaesu HTs, and they have the following defaults built into the Military Air Band:
225-249.9875 AM
250-254.9875 FM
255-334.9875 AM
355-419.9875 FM

I'm not sure how standardized this is, and I can't find any clues at the RR Wiki you referenced. Under the above scheme most (but not all) of the frequencies listed would be AM. I'm happy to make them all AM, but it would be nice if someone knew for sure. MrGadget ... are you listening?

-Tim
 

fmon

Silent Key Jan. 14, 2012
Joined
May 11, 2002
Messages
7,741
Reaction score
1
Location
Eclipse, Virginia
Lou wrote a piece in amplitude modulation section of the Wiki link indicating 108 to near 138 as AM and 225 - 380 as AM. 138 - 144 has a note regarding Blue Angles Ground units in NFM use.

I for one, flew in navy aircraft for a good part of 1956 through 78 and the above fits the bill. However, my only use of 138 - 144 was in NFM in ground support vehicles or target spotting from ground to aircraft's using the target. 225 - 380 was all AM.

I hear navy crash vehicles using 140.1000 FM frequently.
 

theaton

Member N7VU
Database Admin
Joined
Sep 17, 2004
Messages
896
Reaction score
188
Location
Moab, Utah
Thanks Frank. Since you are all or mostly correct I switched the 225-420 MHz listings all to AM. I'll switch back any that are confirmed as FM upon request.

-Tim
 

gldavis

KE7MQF
Premium Subscriber
Joined
Oct 17, 2002
Messages
1,618
Reaction score
283
Location
Bountiful, UT
This is what I've heard the past couple of years. 220~400 Mhz are all AM. 138~144 Mhz are a mix of AM and NFM.
 
Last edited:

N7YUO

Member
Joined
Mar 23, 2004
Messages
729
Reaction score
111
Location
Kearns, UT
From my experience in the Marine Corps Air Wings, (not as a pilot)
If aircraft transmitted in Frequency Modulation (FM) They would be constantly "Off Frequency"
due to the high speed that they are traveling. Because of this, all avaiation radios are AM.
Certain aircraft have FM radios for: Medevac, Search and Rescue, Traffic Patrol, Drug Interdiction.
108 to 138 should be exclusively AM but there may be exceptions.
138 up I have always found to be FM, usually Land Mobile Radio such as Military Police.
Before Hill AFB became trunked on 406, they had numerous FM radios in this band.
The Navy Blue Angels and Air Force Thunderbirds operate some AM in this band

The 200 and 300 band are military aviation, and are all AM.
The 380-400 band is a new, government trunked radio band that uses Project 25 (I believe)
The 400-406 band is for satellite communications.
The 406-420 band is FM Land Mobile Radio. The government mandated for radios to be narrowband.
There is a band plan with frequency pair assignments and simplex channels.
 
Last edited:
Status
Not open for further replies.
Top