Activate the Emergency Beacon Walkthrough
Once you reach Belching Betty head into the metal shack near the entrance and speak with the Protectron Bernie. he will give you a Fire Breather Kit Ticket, which you can use on the nearby Kit Dispenser to obtain a Fire Breather Helmet, Fire Breather Uniform, Anti-Scorched Training Pistol, and some 10mm Rounds. The helmet protects you from the poor air quality, and the pistol does bonus damage to Scorched enemies, so equipping both is highly recommended. Once you are geared up it’s time to head into the Belching Betty and find the emergency beacon.
Belching Betty is a fairly straightforward area, packed with dozens of Scorched enemies in tight spaces. Head into the office directly to the left when you walk in and grab the Bobby Pins off the table. Search the other nearby rooms for any useful loot or ammo, then head past the gate and into the actual mine. The first half of the mine is a single path, guarded by various Scorched enemies. Many are equipped with melee weapons, so just sit back and pick them off with your training pistol.
When you reach the fork in the paths, I highly recommend following the right set of tracks. Both paths lead to the final room at the bottom of the mine, but the right path lets you enter from above rather than below, giving you high ground advantage over any Scorched enemies. Follow the path, kill the Scorched, and make your way to the bottom room containing the emergency beacon.
Clear out all of the Scorched in the final room, then make your way over to the emergency beacon. Loot the Fire Breather corpses on the ground, heal yourself, then press the button which will summon more Scorched enemies. After the Scorched are dead you have two choices: head back up the way you came, or follow the alternate path back out of the mine. If you head down the alternate path you will find a small room containing a workbench, first aid kit, and a machine with a fusion core you can take.