I am sharing a better solution for protecting sensitive electronics stored in metal military surplus ammunition cans made into a Faraday cage. In the Part 1, I talked about the ammunition cans that can be used. We then began the instructions for building ammunition can gaskets by listing the materials and tools required. Now, let’s move on.
Making and Assembling the RF and EMP Shielding Gasket
The following instructions are for a 20mm M548 ammunition can, which is my preferred can size. If using another ammunition can, you will need to make adjustments in measurements within these directions to adjust for your ammo can’s size. I’ll give some guidance along the way for doing so.
1. Cut the sheet metal into a 7” by 16¾” rectangle, for the 20mm can.
But always start out by taking a good measurement. You know the old saying of “measure twice, cut once” still applies here. (See the description below as to how to measure and cut the right sheet size for the gasket.) For other can sizes, cut the sheet metal accordingly. Make sure that the sheet metal slightly overlaps the rubber seal but isn’t too big that it overlaps the exterior dimension of the lower part of the can or affects or interferes with the inside edge or lip of the ammo can.
Continue reading“Protecting Electronics in Metal Military Surplus Ammunition Cans- Part 2, by J.T.”