You have a nice piece. I use my Pioneer RT-707 often in my garage system, fun to use, sounds great and looks cool. You might try the links below to for more info:
https://www.audionirvana.org/forum/the-audio-vault/all-things-reel-to-reel
https://www.audiokarma.org/forums/index.php?forums/tape.157/
https://www.audionirvana.org/forum/the-audio-vault/all-things-reel-to-reel
https://www.audiokarma.org/forums/index.php?forums/tape.157/