Tektronix 8501 Data Management Unit

Hi all, Does anybody have some docs of the Tektronix 8501 Data Management Unit? I have picked one up because it based on a LSI-11/2 (M7270) and it reminds me of my first job in Olivetti many years ago. Apparently the power supply is dead. I'm looking possibly the schematics of the power supply and the RT-11 disks. TIA e. ======================================================================== Enrico Badella email: enrico.badella(a)softstar.it Soft*Star srl eb(a)vax.cnuce.cnr.it InterNetworking Specialists tel: +39-011-746092 Via Camburzano 9 fax: +39-011-746487 10143 Torino, Italy Wanted, for hobbyist use, any type of PDP and microVAX hardware,software, manuals,schematics,etc. and DEC-10 docs or manuals ==========================================================================