This is a Fostex R8: 8-channels on a standard 6,3 mm tape with dolby C @38 cm/s.
I totally repaired, refurbished, recapped and calibrated the deck.
The result is in this video.
The handy Quick Reference Guide PDF as mentioned in the video containing the calibration procedure, location of the pots and capacitors etc. you can find it here on my site:
https://www.reeltoreel.nl/Fostex%20R8/
Check my site for other content. Visit my website: https://www.reeltoreel.nl/

0:00 intro
4:41 demonstration
10:06 audio demonstration