I'm not sure what's up with all these posts about the land down under lately, but I recently ran across
THIS great Australian site that has tons of information on Aussie guitar amps as well as building guitar amps and effects. included are a number of old magazine projects from EA. if you scroll down the page, you'll find schematics for fuzz, compressor, "phase vibrato" Leslie sim, and tremolo projects as well as a number amps. be sure to check out the rest of the site, as it's filled with some very cool articles and schematics, such as fsb forumite Phil's cool
reverb project.