M
MACGYVR
The setup you need is a linked repeater system. Ideally it would be a repeater every 25 miles (just throwing out that number for coverage) So the 14 repearters are linked via various means like internet, 10mtr links, 220Mhz, links, 440 etc The entire system acts as one giant repeater.
I used a system like this in NY calle dthe N2HJD system. I think at that time it was 8 repeaters all linked and you could use everything from 10mtrs to 1.2Ghz to access it depending on where you were in western NY. That covered from about Buffalo to Syracuse and worked great. But it took years of engineering to get it right and cash.
But as you can see the 350miles is a problem. Albany to Buffalo is 300 miles so basically you are talking the distance from the canadian border to the mass border if it was in NY.
There is no single system out there that will do what you want. You need relay stations setup with HF radios. Those HF radios share a common frequency and operate as a net. They then will pass off information to the person responsible for local VHF net operation for their section of the route. This VHF person then will be on a freq that is assigned to that section and is used by the mobile units. Mobile unit calls the VHF net who then passes info to the HF operatior who then sends info to HQ and vice versa. If the end of the route needs to talk to the beginning of the route then the HF station at the end calls netcontrol, netcontrol calls the begining of the route and confirms wether they can hear the end directly. If so the net control allows the direct comms, if not netcontrol relays the information between the 2 stations.
This is basic emergency comms 101 in amateur radio and is the most effective way to communicate over large distances.
I used a system like this in NY calle dthe N2HJD system. I think at that time it was 8 repeaters all linked and you could use everything from 10mtrs to 1.2Ghz to access it depending on where you were in western NY. That covered from about Buffalo to Syracuse and worked great. But it took years of engineering to get it right and cash.
But as you can see the 350miles is a problem. Albany to Buffalo is 300 miles so basically you are talking the distance from the canadian border to the mass border if it was in NY.
There is no single system out there that will do what you want. You need relay stations setup with HF radios. Those HF radios share a common frequency and operate as a net. They then will pass off information to the person responsible for local VHF net operation for their section of the route. This VHF person then will be on a freq that is assigned to that section and is used by the mobile units. Mobile unit calls the VHF net who then passes info to the HF operatior who then sends info to HQ and vice versa. If the end of the route needs to talk to the beginning of the route then the HF station at the end calls netcontrol, netcontrol calls the begining of the route and confirms wether they can hear the end directly. If so the net control allows the direct comms, if not netcontrol relays the information between the 2 stations.
This is basic emergency comms 101 in amateur radio and is the most effective way to communicate over large distances.