Guild Wars 2

-Translocator Beacon
-Oscillating Diaphragm
-Focusing Crystal

I need help

Focusing crystal from a champion Aetherblade Pirate Captain.
Oscillating Diaphragm from Champion Twisted Nightmare.
Translator Beacon from one of her larger portals.

From http://dulfy.net/2013/08/20/gw2-emissary-vorpps-field-assistant-achievement-guide/

Translocator Beacon: http://wiki.guildwars2.com/wiki/Translocator_Beacon
Oscillating Diaphragm: http://wiki.guildwars2.com/wiki/Oscillating_Diaphragm
Focusing Crystal: http://wiki.guildwars2.com/wiki/Focusing_Crystal

Mainly, killing champions in an invasion.

Does it have a drop chance? Because after I killed those champions i kept spamming AoE loot everywhere but i still cant find it

I don’t remember if it dropped, or they appeared in my bag. I wasn’t paying that much attention, because there were lots of loot. But after one invasion I had all three in my bag. Do you have completed the Portal Invasion Closer achivement? these only drop after you complete that.

They get automatically added to your inventory when you kill a Champion/close a portal.

One thing that might help is to make sure you use the Holographic Communicator to talk to Vorpp in between each step. I made sure to do that between each step, even though I was attending the invasions across 5 different characters.

You need to stop 5 invasions first (5 different invasions), so you get Vorpp’s field assistant achievement. After that you can get all 3 items as stated above. Maybe communicate with Vorpp once you get this achievement so your character knows how to proceed. I think this is automatically communicated to you by Vorpp, but talking to him might help.