So this is what I came up with. It does well to reduce the distortion created by low frequency vibrations when recording live music. It will work to a lesser degree to reduce table noise during podcasts, interviews, narrations, and other similar activities.
All of the materials used come from my scrap bins, but if you were to purchase everything new, total cost would still be less than $15 (US). Total build time is less than an hour, not including paint drying time.
4" Hole Saw and a suitable drill
1/4" drill bit
Small flathead screwdriver
Ruler or tape measure
Sandpaper and/or electric sander
Materials you'll need:
6" x 6" x 3/4" MDF, wood, or plywood
1/4-20 bolts, 1 1/2" long with washers and nuts
Elastic hair ties
Step 1: Main Components
Using a hole saw drill a large hole in the middle of the square. The exact size does not matter. In this case, it's 4 inches, as that's the size hole saw I had on hand. If you don't own on, and can't borrow one, the same effect can be achieved using a jigsaw.
We'll be using both the square piece and the round cutout, so don't discard anything.
Step 2: Sanding
Step 3: Drill Some Holes
On the square piece, drill 1 hole in each corner, 1 inch from the inside edge of the hole with a 1/4 inch drill bit.
On the round piece, drill 4 evenly spaced holes 1/2 inch from the edge with the same 1/4 inch drill bit.
It's important that all of the holes are drilled straight up and down as acurately as possible. Errors made during this step will change the alignment of the assembled mount.
Step 4: Hardware Time
4 x 1/4-20 1 1/2 inches long
8 x 1/4" washers
4 x 1/4-20 threaded coupling
At each corner of the square piece, assemble the hardware as shown.
Step 5: Hair Ties
In the middle hole, I used a short 1/4-20 bolt. This will be used to attach the recorder.
Step 6: Assembly
If the edge of the round piece touches the inside of the square piece, try adjusting the hair ties to center the round piece in the hole. If that doesn't help, reduce the diameter of the round piece by sanding or filing it.
Step 7: Viola!
While it looks nice, and appears to function as desired, only a side by side comparison will show if it does actually work. As mentioned earlier, its' intended purpose is to reduce low frequency vibrations picked up by the recorder through the surface that it's sitting on. Initial testing seems to indicate that it works fairly well.
Some optional extras you might want to add to this project are:
Add some paint
Put rubber feet on the legs to avoid scratching the table
Make a strain relief or other method to secure headphone/remote wires to the square piece
Use a proper thumbscrew (like a tripod) to attach the recorder.
Add something heavy to the square piece for more stability
Thanks for checking out my first Instructable. Comments, critiques, and kudos are most welcome.