Magnetic Reference Lab 41J216
1" Multifrequency Calibration Alignment Tape for Open Reel Applications (15"/s, 250 nWb/M)

OUR PART #  41J216

These tapes contain a series of recorded sine-wave signals for general-purpose use for standardizing azimuth, equalization, and sensitivity (usually called "gain" or "level") of open-reel analog audio magnetic tape reproducers.  They are not intended for testing tape reproducer speed, flutter, distortion, or track placement.

The signals on these tapes can be monitored with a voltmeter—either the program level meter in the tape reproducer or an external voltmeter.  Useful auxiliary test equipment includes a loudspeaker or headphones to hear the voice announcements of frequencies and levels, an oscilloscope to observe waveforms, and a level recorder in order to provide a graph of the frequency response.


  • Tape Width: 1" (25 mm)
  • Playing Time: 10 minutes
  • Tape Speed: 15"/s (380 mm/s)
  • Equalization Standard: NAB (IEC2)
  • Fringing Compensated for narrow-track systems
  • Level of Frequency Response Section: 0 dB
  • Catalog Number for Reference Fluxivity (250 nWb/M): 41J216
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