The 220 to 260.mhz band is now for businesses for digital communication in America We see PTC from the railroad using it, and we see UPS and some other companies with a full duplex system They have their trucks computers communicating with their Central network The handheld's scanner that they use to get signatures and to scan packages is downloading the data every time they put it in its cradle in the truck and there are two way radios in the truck that are sending that digital Data in real-time to the company's main computer system so they can update their records The Central computer sends back that it was received and verified and they clear out the information from the handheld scanner in each truck There are some analog 2-way radios that I have seen that do the 220 to 260 band I don't remember where the military aircraft a.m. band starts I think it's around 260 MHz and runs through the lower 300 MHz band. The 350 to 420 MHz used to be for us military use only, but I am seeing a lot of business radios using the 350 to 380 and 380 to 420 band I don't know if these are pairs, or if they are even supposed to be using that band, but there are lots of people using this now I guess because the UHF 450 to 525 MHz is all used up I used to scan the military band a long time ago and there was never any transmissions Once in a great while I would hear something from the high 290s and low 300s from military aircraft, but even that band was very empty I think in the early 2000s the US military created a WAN that had repeaters and control channels at each military base and they were all in the low 400 MHz range, right around 400 MHz. Maybe 390 to 410 MHz. Each base had a different control channel frequency and their own frequencies for that trunked control channel Some States created a very similar system and some state police created a similar system, but in the 800 band This allowed them to go from City to City area to area and stay connected to dispatch all on the same network The military was the largest of these systems and it was really impressive because they could travel across the United States and as the radios moved from one zone to another the radio would scan for the trunk control channel from the next bass and lock into it and reprogram the radios automatically and register each unit as they traveled automatically Right after 9/11 and the creation of Homeland Security they ordered the removal of all of the military frequency licenses from the FCC database as well as other FCC licenses for items they considered critical to National Security they even took out all of the cellular network information so you could no longer look up what towers were in your area and what frequencies were assigned to those towers But the 220 band is mostly digital Data and a lot of it is automatic It's a lot of control data for different systems The PTC data is not encrypted but it's not supposed to be monitored It gives all of the locomotive and train data its location and the status of all of the railroad devices including the switches and the signals and the crossings and it is supposed to talk to vehicles to let the self-driving cars know they are approaching a crossing and that a train is coming I keep wondering if they're going to use that band for cars to talk to each other I don't think the 5G network is going to work because of the delay They're going to need real-time inter-vehicle communication Each car is going to need to transmit its speed direction exact location intentions etc to each other car on the road It's going to need to be independent of any other system and not rely on any other system Similar to how are traffic control and the ATCAS transmits their data The 1.090 GHz frequency ( I can't remember the name for this system ) but this transmits the flight number the exact GPS location of the plane the altitude the speed that direction whole bunch of information so that each plane can see each plane around them and what they are doing That is actually a really cool thing if you want to set up a discone antenna and an SDR and load the software for this system you can observe all the airplanes in a 200-mile radius, and it's in real-time and it's much more complete than any of the commercial websites that show flight data I was shocked how many planes I actually could see with this system And the distance I had the antenna inside and I was still getting 200 miles so outside I would expect to get further It even showed all of the planes parked on the ground that were turned on It is a really neat thing that I didn't know existed There is also a similar system for all boats And you can see in real-time all the ships and pleasure craft In your area
Un consejo muy particular que por mi experiencia en radio hay que tener en cuenta frecuencias que aunque podamos escuchar, pero que no son bandas de Radioaficionados hay que pasar de ellas ,,puedes buscar un problema bastante serio para tí esto lo digo porque conozco personalmente los graves problemas que nos puede traer meterse en frecuencias que no son aptas para la radioaficion y manipular para poder escuchar ,,, peligro ⚡⚡⚡⚡
Fantastic video
If I was looking for the equivalent of the rtl sdr but with transmitting capabilities as well, would would be the best device?
HackRF would be a popular one.
If you don't need all the same freq support that an RTL has, you can look at a Yard Stick One.
@@RedMesaLabs thank you
The 220 to 260.mhz band is now for businesses for digital communication in America
We see PTC from the railroad using it, and we see UPS and some other companies with a full duplex system
They have their trucks computers communicating with their Central network
The handheld's scanner that they use to get signatures and to scan packages is downloading the data every time they put it in its cradle in the truck and there are two way radios in the truck that are sending that digital Data in real-time to the company's main computer system so they can update their records
The Central computer sends back that it was received and verified and they clear out the information from the handheld scanner in each truck
There are some analog 2-way radios that I have seen that do the 220 to 260 band
I don't remember where the military aircraft a.m. band starts I think it's around 260 MHz and runs through the lower 300 MHz band.
The 350 to 420 MHz used to be for us military use only, but I am seeing a lot of business radios using the 350 to 380 and 380 to 420 band
I don't know if these are pairs, or if they are even supposed to be using that band, but there are lots of people using this now
I guess because the UHF 450 to 525 MHz is all used up
I used to scan the military band a long time ago and there was never any transmissions
Once in a great while I would hear something from the high 290s and low 300s from military aircraft, but even that band was very empty
I think in the early 2000s the US military created a WAN that had repeaters and control channels at each military base and they were all in the low 400 MHz range, right around 400 MHz. Maybe 390 to 410 MHz.
Each base had a different control channel frequency and their own frequencies for that trunked control channel
Some States created a very similar system and some state police created a similar system, but in the 800 band
This allowed them to go from City to City area to area and stay connected to dispatch all on the same network
The military was the largest of these systems and it was really impressive because they could travel across the United States and as the radios moved from one zone to another the radio would scan for the trunk control channel from the next bass and lock into it and reprogram the radios automatically and register each unit as they traveled automatically
Right after 9/11 and the creation of Homeland Security they ordered the removal of all of the military frequency licenses from the FCC database as well as other FCC licenses for items they considered critical to National Security
they even took out all of the cellular network information so you could no longer look up what towers were in your area and what frequencies were assigned to those towers
But the 220 band is mostly digital Data and a lot of it is automatic
It's a lot of control data for different systems
The PTC data is not encrypted but it's not supposed to be monitored
It gives all of the locomotive and train data its location and the status of all of the railroad devices including the switches and the signals and the crossings and it is supposed to talk to vehicles to let the self-driving cars know they are approaching a crossing and that a train is coming
I keep wondering if they're going to use that band for cars to talk to each other
I don't think the 5G network is going to work because of the delay
They're going to need real-time inter-vehicle communication
Each car is going to need to transmit its speed direction exact location intentions etc to each other car on the road
It's going to need to be independent of any other system and not rely on any other system
Similar to how are traffic control and the ATCAS transmits their data
The 1.090 GHz frequency ( I can't remember the name for this system ) but this transmits the flight number the exact GPS location of the plane the altitude the speed that direction whole bunch of information so that each plane can see each plane around them and what they are doing
That is actually a really cool thing if you want to set up a discone antenna and an SDR and load the software for this system you can observe all the airplanes in a 200-mile radius, and it's in real-time and it's much more complete than any of the commercial websites that show flight data
I was shocked how many planes I actually could see with this system
And the distance I had the antenna inside and I was still getting 200 miles so outside I would expect to get further
It even showed all of the planes parked on the ground that were turned on
It is a really neat thing that I didn't know existed
There is also a similar system for all boats
And you can see in real-time all the ships and pleasure craft
In your area
222 to 225 MHz is an Amateur Radio band in the US
@@robert20770 it is, but secondary to all other uses. A lot of digital data is being sent by companies for control data, especially short range.
tldr
@@ocsrc In the US Amateur Radio is Primary in 222-225. I know, I have an Amateur Radio license. KA3XYX
Typo, KA3ZYX
Aqui e Brasilllll 🇧🇷🇧🇷🇧🇷🇧🇷
Could you let us know where you find these antennas?
Ebay is the best source. Just make sure you take a close look at the condition of the antenna.
What was the name of the apps ur using on Android?
The App is called "RF Analyzer"
Un consejo muy particular que por mi experiencia en radio hay que tener en cuenta frecuencias que aunque podamos escuchar, pero que no son bandas de Radioaficionados hay que pasar de ellas ,,puedes buscar un problema bastante serio para tí esto lo digo porque conozco personalmente los graves problemas que nos puede traer meterse en frecuencias que no son aptas para la radioaficion y manipular para poder escuchar ,,, peligro ⚡⚡⚡⚡
Drug runners, drug runners....
Poor loggers communicating on the cheap.
Drug runners... Sheeesh
Bit of both tbh.