The cast aluminum box is an electrical department item. Made for outdoor lighting junctions etc. This one is called a single gang, three hole. A gasketed blank cover is selected to fit, along with some threaded aluminum plugs. Stamped right on the box and cover, it says "Suitable for Wet Locations". Smear a little SILICONE GEL on the edges to keep the gasket supple:
In order to mount the Brass 5 way binding post, one of the hole plugs was punched using a 1/2” “D” punch. This makes a hole with a flat side, and that mates perfectly with the connector, so that it won’t spin. Brass nuts hold the 5 way assembly secure, and the plug is bottomed out in the top hole. A few drops of Locktite Outdoor Fixture Adhesive (Home Depot) keeps the plug in place, and further waterproofs it.
Inside you can see the Toroid, it is wound according to designs in ON4UN's book, “Low Band DXing”, and this one is a large core. In many applications a similar transformer on a smaller core is used. Fiberglas tape is wrapped around the homemade aluminum bracket, which itself is held down by a stainless steel screw. The TyRap secures the core from moving, and simply passes through two holes punched in the bracket:
Notice the routing of the wire coming from the antenna wire. It is made to run parallel to the side of the box, with a little space in between. This is merely an effort to control the arc path in case of lightning. Later designs included spark gap devices as well. Notice the conduit fitting on the bottom panel. . I use a 6 foot section of copper water pipe as the ground rod, the top of which slips into the conduit fitting, supporting the BevBox. A separate heavy ground wire is clamped to the rod and attached to the big brass screw on the bottom panel.lightning ground is provided via the big brass screw shown on the bottom panel. (Note, copper pipe makes a good, inexpensive ground rod. To install it, slip a regular ground rod inside then work the pair up and down in a shallow hole filled with water. On each stroke, it will go deeper into the earth, no pounding needed. When it is as far as you want, slip out the rod for use on the next pipe).In this unit the silver/Teflon type M (UHF) connector comes out the bottom also:
The third hole is sealed with a plug in this instance.
Just before we seal her up, a packet of dry Silica Gel in wedged in place: