Here are the steps:
 acquired a 9 track tape drive;
 recovered a communist-era Digital Alpha Numeric Terminal vt100-compatible;
 found an old mainframe and brought it home part by part. Also communist clone;
 acquired the second tape drive - power supply broken;
 Restoration project started
First step - getting the tape drive working.
This project aims to build an interface between modern and old tech. In order to get the monster working I need whatever data I can get: operating system, backup tapes, software, floppy disks, anything.
Industrial 9 track Tape Drives talk Pertec and this is the interface I am going to focus for now. So these are the functions:
1. PERTEC (9 track tape physical drive) to MicroSD Card (host microcontroller) converter - read/write data from/to tape;
2. PERTEC Drive Emulator (micro-controlled sd-card) to Mainframe (host) - acting as a genuine 9 track tape drive peripheral;
3. PERTEC (9 track tape physical drive) to SCSI (host) Converter - some people decide these devices should cost a ton of money and I want to have some fun by telling a little bit of their secrets;
4. 9 Track Tape-based USB Drive - a big, huge, mega useless mass storage USB.... wooden-stab or stick - just for fun.
My English is not too good due to the lack of good quality beer in my city, but you will get the idea:
PCB and experiments will come later.
In the mean time I'm getting my brain cooked at http://bitsavers.org/components/ while reading tons of documentation about anything related.