Information with circuit diagram.
http://www.xprt.net/~rcrowley/SonyC37/index.htm
using valve.
http://www.geocities.com/TimesSquare/1965/phono.html
called Bug
http://www.web-ee.com/Schematics/Bug/Bug.htm
http://www.paia.com/tubestuf.htm
Describes the modification of conventional hookup and option where FET is connected as source follower with3 wires to preamp.
http://www.linkwitzlab.com/images/graphics/microph1.gif
This site provides many preamplifíer plans.
http://mitglied.lycos.de/Promitheus/preamps.htm
with Artificial Earth.
http://sound.westhost.com/project32.htm
http://margo.student.utwente.nl/el/audio/mic_amp.zip