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OUR PART #: 21T204 MFR #: 21T204
These tapes contain a series of recorded sine-wave signals for general-purpose use for standardizing azimuth, equalization... ...Read more
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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.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
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The MRL 21T204 cal tape worked perfectly, my only thought was that the tones should be longer to allow for extended calibration. Not all calibration tasks take 15 sec. IMO extending the Tone Length to 30 Secs for each tone would greatly enhance the usability of the MRL tape. Lastly the tape is a necessary 'tool' to get your deck back in order, especially with the old decks, many folks buy the old decks and restoring them making the $$ a little more affordable, they would sell many more !
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