Go to the "Wayback Machine" at http://Archive.org and at the top of the page you will see "enter URL or keywords", put in http://www.dulcimersessions.com/ and hit ENTER. Working my way back through the "snapshots" usually does it. The most recent snapshot was 9/29/17. At first it didn't look promising, but scroll through the other articles down to "Welcome to the June/July 2010 Issue of Dulcimer Sessions" which has a posting date of Nov. 30, 2016. Click "Read More" and it looks like you have access to other earlier issues. I clicked Mountain Dulcimer Tunes and was able to reach that. If there is more you should be access and can't, I'd go back to those other "snapshots" until you get a thorough one. I'm not (yet) familiar with it, so those of you who know it will be a better judge.
Something I just discovered is Archive.org has been dumping some sites for lack of viewing, so the more people view it, the more it stays alive. Had this happen recently with storyteller's site. Supposedly it wasn't there, yet I noticed in the middle of the page it looked like a link. Clicked it and got it!
The "Wayback Machine" is a great service when a long-running site is no longer active. Use it to keep it going.