Monday, July 21, 2014

Air Force One Phone Systems

An interesting post has appeared on line about the new phone systems in use aboard Air Force One. It's an interesting read:

http://electrospaces.blogspot.com/2014/07/new-phones-aboard-air-force-one.html

There is also an story on something I've always wondered about, how they got a secured Blackberry for President Obama:

http://electrospaces.blogspot.com/2013/04/how-obamas-blackberry-got-secured.html

Friday, July 04, 2014

NIFC NATIONAL AIR-TO-GROUND FREQUENCIES

The National Interagency Fire Center maintains a standard issue of nationwide air-to-ground (A/G) channels for use in firefighting and other incidents on federal lands. I have been asked for some time if I had the complete list of these A/G channels, so I decided to sit down and go through all the materials I had access to and see if I could come up with a good list.

What I discovered is that there are some variations of these A/G frequencies, and even some official US government publications don't agree. So keep in mind that this list is not cast in stone, but may have some variations...

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A/G 01            154.3100

A/G 02            166.6375

A/G 03            166.6750

A/G 04            159.3450

A/G 04            166.6875

A/G 05            166.7500

A/G 06            166.8000

A/G 07            166.8500

A/G 08            166.8750

A/G 09            166.9125

A/G 10            166.9375

A/G 11            166.9500

A/G 12            167.0750

A/G 13            167.4250

A/G 14            167.5000

A/G 15            167.5250

A/G 16            167.9500

A/G 17            167.9875

A/G 18            168.0125

A/G 19            168.1250

A/G 20            168.1750

A/G 21            168.1500

A/G 22            166.6125

A/G 23            166.7625

A/G 23            168.5500

A/G 24            168.6375

A/G 25            168.7250

A/G 25            168.7500

A/G 26            166.6875

A/G 26            169.8750

A/G 27            166.8250

A/G 27            169.9500

A/G 27            172.2750

A/G 28            170.0000

A/G 29            170.5250

A/G 30            171.1375

A/G 31            171.5250

A/G 32            166.9625

A/G 32            166.9625

A/G 32            171.5500

A/G 33            171.5750

A/G 34            167.1750

A/G 34            171.7875

A/G 35            167.2250

A/G 35            172.2250

A/G 36            172.2500

A/G 37            167.3000

A/G 37            172.2750

A/G 38            167.3750

A/G 38            172.3250

A/G 39            172.4000

A/G 40            167.4500

A/G 41            167.4750

A/G 42            167.5500

A/G 43            167.6000

A/G 44            167.6250

A/G 45            167.6500

A/G 46            167.7000

A/G 47            167.7250

A/G 48            167.8875

A/G 49            168.0375

A/G 50            168.2750

A/G 50            168.2875

A/G 51            168.3125

A/G 52            168.3875

A/G 53            168.4875

A/G 54            168.5375

A/G 55            168.5625

A/G 56            168.6625

A/G 57            168.0875

A/G 57            168.7250

A/G 58            168.0875

A/G 58            169.0875

A/G 59            169.1125

A/G 60            169.1250

A/G 61            169.2875

A/G 62            169.3625

A/G 63            171.4250

A/G 64            171.4750

A/G 65            172.3750

A/G 66            166.6750

A/G 67            159.2250

A/G 68            159.3900

A/G 69            159.4500

A/G 70            167.9500

A/G 71            168.6750

A/G 72            169.1500

A/G 73            169.2000

Some additional information on these and other NIFC assignments can be found on the Radio Reference wiki page here:

http://wiki.radioreference.com/index.php?title=National_Incident_Radio_Support_Cache&diff=98706&oldid=98699

Thursday, May 22, 2014

Thursday, May 15, 2014

NIFOG 1.5 Available

The latest version of the National Interoperability Field Operations Guide (NIFOG) is now available for downloading. You can find links to the various formats of downloads here:

http://www.dhs.gov/national-interoperability-field-operations-guide

This new version contains updated information as well as new information that anyone interested in communications monitoring will find useful.

Tuesday, May 13, 2014

WHCA Blog

I just stumbled upon a blog page that I haven't seen before. It has some interesting information about the White House Communications Agency (WHCA) history and some interesting facilities and photos. Check it out here:

http://whcacannonball.blogspot.com

Friday, May 02, 2014

BATFE Update

Just as the May issue of The Spectrum Monitor came out, with my column concerning the Bureau of Alcohol Tobacco Firearms and Explosives (BATFE), I received an update regarding the channel usage by this agency.

For as long as I've been listening to federal stuff, the ATF has always used 165.2875 MHz as their primary channel. However, with the eventual refarming of the VHF 162-174 MHz federal band to make a standard repeater offset (see the January Federal Wavelengths column for more information), this was bound to change. Information is that at least one major metro area, the ATF has already changed their primary repeater output to 170.9625 MHz, N650 with 165.2875 MHz as the input frequency. I have not run into this change in my travels yet, but will definitely keep an eye out for it.

Wednesday, April 23, 2014

SoCal DEA going VHF?

I just caught some traffic on a VHF channel with some radio techs regarding receive sites and signal strengths as well as a radio interface bridge. The conversation was on 173.1625 MHz, N156, and I only heard one side of the conversation most of the time, but did hear a couple of replies from a field unit. I also heard one person ask if they were on the "APX" radio. APX is the Motorola radio series that features multi-band operation in a single radio.

This joins the frequencies of 170.6500 MHz and 170.9500 MHz that are most likely VHF DEA channels that have been heard in the Southern California area.