Something's Buzzing (and the strings are clear of the frets)

This post has been edited, with edits in red.
 
Just a quick note to say that I've found that buzzing can sound like it's coming from one location on the Dixie when, in fact, it's coming from a completely different place.

The head picks up vibrations from anywhere on the Dixie -- it acts just like an amplifier.

Damping a part will not necessarily tell you if that part is the culprit.

Damping the head may well reduce/remove the buzz, but chances are "it ain't the head that's buzzing."

In my experience, buzzing has usually either been caused by a loose part, or by a string buzzing against the "nut," or by a string (or strings) not being trimmed at the tail piece (knot) end of the string.

The "nut" is to the left of the yellow rubber bands.

The nut has slots to keep the strings aligned.

On the Dixie, the slots can be pretty wide -- wider than the strings. This can cause buzzing that runs down the string to the bridge, directly to the head.

My fix for it here is to tie an extra piece of string around the four strings to pull the outside strings toward the inside of the slots they rest in. It's a loop around the strings, not the neck. I've also used a piece of elastic to do this, but I didn't have any that was small enough.

To keep the "string loop" tight against the nut, I doubled a yellow rubber band and pushed it against the loop so it stays against the nut.

Well, it does work :-)

And you can tell which string is the culprit in this scenario. The frequency of the buzz will be the frequency of the string. Listen to the buzz, hum it and play each string until you find what you're humming.

Sometimes I'm in a hurry when changing strings, and I leave too much string on the knot end of the string. Those "string tails" hit the head, and they will buzz like crazy. Trim the extra string at the knot end close to the knot so none of the free end of the string hits the head.