So, after Raven Rock, the Enclave radios work for awhile, and then when you wake up in the Citadel they stop working.
So, on characters who want as much power armor as they can carry, and then some, they store all the collected loot from raven rock in that one gun case in the hall, where you find the gatling laser (behind the security barrier.) Normally, when you leave Raven Rock, you are greeted by Fawkes, you hose down the area, the world explodes, walk home with or without Fawkes.
If you open the outer door, step out, get the message that you have discovered Raven Rock, then immediately fast travel to whereever, preventing Fawkes from ever talking to you, you can return at a later date, and access all that loot you stored. You can go fairly deep in the last hallway, so if you have loot lying on the floor, you can retrieve that as well.
Here is what happens if you do the fast travel, no talk green giant thang above ^^:
1. You will never see Fawkes again, he will never be at the Museum of History. He disappears.
2. You can go back to that Raven Rock last hallway, and get yer loot.
3. ****Enclave Radio will play on forever.****
I've repeated this across three characters, however it didn't work with the fourth.... You should make a hard save before opening the outer door, so you can try again if Fawkes is right there outside the door.
Hope this works for you diehard Enclave radio nuts.