I'm Gabriele from Italy, I'm a guitarist and a tinkerer pretty much like everyone here and I've built many pedals using the layouts provided on this awesome website.
Recently I've had the chance to try an old Marshall Lead 30 (the 5010 model) and I've found it really amazing. Searching on the web it looks like the Lead 30 and its smaller brother the Lead 12 both have an excellent reputation and also seems that the smaller model was used by some big names like Billy Gibbons and Steve Lukather back in the day.
Looking at the preamp schematics they look really simple, so I thought that it would be cool to have them laid out, to plug them into a power amp of choice, a speaker simulator for direct recording or maybe even used as a stompbox.
Here are the schematics for the Lead 12:
http://drtube.com/schematics/marshall/3005.gif And for the lead 30:
Thanks to everyone that will help and for the great work you're doing here!