Mode For Huntress And Norad Mil Freq's ?

[BOBRR]

Hello:

Always uncertain about modes, as there always seem to be exceptions.
Would like to try and hear some Huntress and Norad Aero Mil comms.
Have the following freq's for.

Can anyone please tell me if they are all AM, or are some USB, or... ?

Is there a general rule for knowing Mil aero modes ?

Or, is it simply the same for commercial aero., 108.000 - 136.975 and 225.000 - 399.950
all being AM for anything inclusive ?

228.xxx 215.xxx
232. 283.
238. 303.
239. 312.

and I have these down as USB, but now I'm doubting that they are correct.
Aren't these (also) what the upper list are ?

308.xxx 277.xxx 135.xxx 234.xxx
305. 288. 312. 135.

Much thanks,
B.

 

[Dank]

All MilAir freqs between 200 and 400 Mhz are AM. You may want to check out the sticky forum for MilAir on the Maryland page of this website. There are numerous references to NY center freqs. It is updated very frequently and there are many knowledgible listeners who post updates and they may be able to answer questions for you.
Dan

 

[wa8vzq]

It can be a little confusing.

As far as aircraft comm with few exceptions the both the VHF and UHF milcoms are all AM and the channel spacing is 25 KHz.

According to the Dec 2005 Monitoring Times Milcom column, there are a few VHF narrow band FM channels - most notably 148.125 and 148.150 - note that these are also Civil Air Patrol freq's. They listed a few other NFM channels 138.000, 138.025, 138.200, 138.225, 139.150, and 139.925. But in my opinion, I wouldn't waste much time looking for NORAD activity on those channels in FM mode - I hear a lot of AM on the 138.XXX freq's but have never heard any NFM.

There are some UHF wideband FM channels that use a frequency divsion multiplexed single sideband voice channels. Much of the time you can hear activity on the order wires for this systems.

Also there is some UHF SATCOM downlinks that are occassionally heard. These are all FM but the deviation is dependent upon the satellite and the channel assignment.

If you are talkiing about ground based, mobile radio systems then both are NFM. The Army uses 12.5 KHz channel spacing on VHF. Haven't spent anytime looking for other branches ground activity to give you any useful informatioin.

Dan
Apple Valley, MN

 

[ka3jjz]

Also the 380-390 mhz band is being used for a new digital trunk system that's being installed across the country at military bases and federal installations. All of these are FM, and some are encrypted (and therefore unreceivable). That would be the source of the ugly digital noises that are heard at times in this band. MT has had some brief articles on the subject

The BCD396 is the only radio capable of trunking in this band; the other digital trunktrackers could listen to the individual freqs (as long as they're in the clear or using just plain APCO25 digital without encryption) but cannot trunk. As many - if not all - of these systems utilize a 9600 baud control channel, a PRO96 or 2096 utilizing Pro96Com could gather system information.

73s Mike

 

[santo]

norad modes

Basically 225 to 400 are in AM Mode. Mil sometimes use vhf also in the 138 to 142 range for a/a comms. Suggest you start with 228.900 (norad scramble freq )and 260.900 (CAP Primary)
Santo