Avalon 741 Fan Duct & Mounting Brackets by jcwren

Last crawled date: 3 years, 1 month ago

These are parts for an Avalon 741 Miner. The fan duct was created for noise reduction. These things have really loud fans. By adding about 4' of 4" dryer flex duct, the volume was seriously reduced. There are a couple of other duct designs out there in the Thingiverse. One was way too thick and heavy, and used 16m of filament. The other didn't fit any known duct size, either US or metric.
The mounting brackets have versions with screw holes that go on the bottom, and versions without screw holes for the top. I used ~1/2" wide Velcro strip that's used for securing cable bundles. The top T spacers are used to prevent pulling the two 741's together when the Velcro is tightened. The top L spacers are there to satisfy my OCD. The holes are sized for #6 sheet metal screws.
The 741 doesn't have enough lip on the front to create a piece that prevents front to rear movement. I solved this by putting a little rubber cement on the areas of the lower L's and T's that contact the bottom of the 741. This is enough to prevent it from skidding, but doesn't glue it irremovably into place.