I don't know if this is the same amp but it looks close.
http://www.cbtricks.com/Amp/palomar_other/palomar_hd_450_fet/graphics/palomar_hd_450fet_sch.pdf
http://www.cbtricks.com/Amp/palomar_other/palomar_hd_450_fet/graphics/palomar_hd_450fet_sch.pdf