Once again, a visit to the Swedish bedrock.. 
FRA -Signal reconnaissance system/plant
Defence Radio Establishment (FRA -In Swedish: "Försvarets radioanstalt") is a Swedish civilian authority operating under the Ministry of Defence. One of FRA's two main tasks is to conduct signals intelligence. The mission from the Swedish government is in particular to identify serious threat to Swedish society, obtain data on foreign actions or intentions of significance for the Swedish foreign, security or defense policy, and also try to keep track of how other states scouts against Sweden .
Nowadays, it is for the FRA that, just as before to intercept radio traffic, but also to intercept and analyze traffic going via cable Sweden (internet traffic) FRA had, and still has, a number of sites across Sweden , and several of them should have been protected by rock and / or concrete.
But now back off the clock a few years. We are now in the southern part of Sweden, how many feet down in the Swedish bedrock is unclear, but the plant was built in 1957-1958, which is confirmed by the nameplates on the doors that say 1957. Indicates that the plant was built by the "Armed Guard Radio Establishment" A few years later, in 1962, the Authority received its present name, National Defence Radio Establishment - FRA.
At that time there was not as much internet, so it was at that time about "old school" , intercept radio traffic , analyze and come up with something useful information. How you heard , type of antennas, is certainly a secret even today , so I will not speculate, but along the emergency exit, it is thick with sturdy cable trays where it is said to have been many copper cables that have been linked to a variety of antennas.
The plant underground really feels like "1957"
It is said that the plant was decommissioned in 1999, and it sounds reasonably well also. The Cold War was over, and to allow civilians to sit the whole day down in a 40 year old bunker was not quite OK... 
io
/B
More and bigger pictures HERE!
More and bigger pictures HERE!
FRA -Signal reconnaissance system/plant
Defence Radio Establishment (FRA -In Swedish: "Försvarets radioanstalt") is a Swedish civilian authority operating under the Ministry of Defence. One of FRA's two main tasks is to conduct signals intelligence. The mission from the Swedish government is in particular to identify serious threat to Swedish society, obtain data on foreign actions or intentions of significance for the Swedish foreign, security or defense policy, and also try to keep track of how other states scouts against Sweden .
Nowadays, it is for the FRA that, just as before to intercept radio traffic, but also to intercept and analyze traffic going via cable Sweden (internet traffic) FRA had, and still has, a number of sites across Sweden , and several of them should have been protected by rock and / or concrete.
But now back off the clock a few years. We are now in the southern part of Sweden, how many feet down in the Swedish bedrock is unclear, but the plant was built in 1957-1958, which is confirmed by the nameplates on the doors that say 1957. Indicates that the plant was built by the "Armed Guard Radio Establishment" A few years later, in 1962, the Authority received its present name, National Defence Radio Establishment - FRA.
At that time there was not as much internet, so it was at that time about "old school" , intercept radio traffic , analyze and come up with something useful information. How you heard , type of antennas, is certainly a secret even today , so I will not speculate, but along the emergency exit, it is thick with sturdy cable trays where it is said to have been many copper cables that have been linked to a variety of antennas.
The plant underground really feels like "1957"
It is said that the plant was decommissioned in 1999, and it sounds reasonably well also. The Cold War was over, and to allow civilians to sit the whole day down in a 40 year old bunker was not quite OK... io/B
More and bigger pictures HERE!
More and bigger pictures HERE!
