This is the one he's been using. That's not the original site we got it from, but it's the same recipe. I can't find Cliff's site any more; it was around for a long time, so it might not be online any more.
We add the optional Tobasco and red pepper, because we like it spicy. However, it's just as good without it. We also use London Broil, which is frequently on sale for 1/2 price at many grocery stores.
We try to always have jerky in the house. I sometimes have it with breakfast, as a healthier alternative to bacon or sausage. It's especially good fresh off the dehydrator, when it's a bit on the crispy side. (It gets chewier as it cools.)
He makes it so often that a couple of years ago I gave him an electric meat slicer (a smaller version of the ones you see in the deli), which makes that part of the process a lot easier. The meat is also easier to slice if it's slightly frozen.