Tube Preamp Schematic

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I want to build a tube preamp for my guitar . Does anyone know where i can find some Schematics?

First, I love that you used the word schematics.
Do these links help any?

http://www.triodeel.com/schindex.htm

http://www.musicianstechcentral.com/schmatic.html

Farfisa combo compact combo organ w/tube preamp demo.