Tapeheads Recorderkoppen spoorinfo
http://www.schimmel.talktalk.net/tape/
http://www.hobby-bastelecke.de/hifi/tonband_spulen.htm
http://www.hobby-bastelecke.de/hifi/index.htm
http://www.hobby-bastelecke.de/hifi/tonband_kopf.htm
http://www.roehrenprofessor.de/magnetbandtechnik/elektrische-einstellungen/
http://richardhess.com/notes/formats/magnetic-media/magnetic-tapes/analog-audio/025-reel-tape/
http://richardhess.com/notes/index.php?s=winding+tapes
http://www.richardhess.com/tape/quarterinch_lrg.gif
http://www.thegreatbear.net/preservation/reel-to-reel/
http://pievox.de/calibration_tapes.html
http://pievox.de/Pegel.htm
http://www.1001hifi.com/reeel-to-reel-classics.html
https://www.iasa-web.org/tc04/replay-equipment-professional-reel-machines
maten
https://blogs.iu.edu/mdpi/
http://reeltoreel.de
http://www.d.umn.edu
http://www.reeltoreel.de/worldwide/Tips09.htm
https://www.tonband.net/spur.php
https://www.tonband.net/faq.php
https://www.tonband.net/tech_trans_ac.php
http://www.sengpielaudio.com/calculator-magneticflux.htm
