Here's an article I wrote for the J.Rockett Audio Design blog a little while ago. These guys make some killer pedals. I use a couple of them every day, their Boing reverb might be the best sounding reverb pedal going, the perfect reverb for guys that hate reverb pedals, for a single knob pedal, it's insanely usable and doesn't get in the way of your playing.. The whole Tour series is plain killer. The Archer has become my main overdrive. This somehow turned into a pedal review...I digress. Lots of good articles on their Blog, worth following along.
Here's the link to the article.
http://rockettpedals.com/tube-amp-biasing-at-home/