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Mini-Cassette

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Title: Mini-Cassette  
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Mini-Cassette

Mini-Cassette
Media type magnetic tape
Encoding analog signal
Capacity 30 minutes
Read mechanism tape head
Write mechanism magnetic recording head
Developed by Philips
Usage dictation
A Sony Mini-Cassette dictation recorder.

The Mini-Cassette, often written minicassette, is a magnetic tape audio cassette format introduced by Philips in 1967. It is used primarily in dictation machines and was also employed as a data storage for the Philips P2000 home computer. Unlike the Compact Cassette, also designed by Philips, and the later Microcassette, introduced by Olympus, the Mini-Cassette does not use a capstan drive system; instead, the tape is propelled past the tape head by the reels.[1] This is mechanically simple and allows the cassette to be made smaller and easier to use, but produces a system unsuited to any task other than voice recording, as the tape speed is not constant (averaging 2.4 cm/s) and prone to wow and flutter. However, the lack of a capstan and a pinch roller drive means that the tape is well-suited to being repeatedly shuttled forward and backward short distances as compared to microcassettes, leading to the Mini-Cassette's use in the first generations of telephone answering machines, and continuing use in the niche markets of dictation and transcription, where fidelity is not critical, but robustness of storage is, and where analog media are still widely preferred.[2]

Microcassette (L) and Mini-Cassette (R)

A smaller version of the Mini-Cassette was later introduced that could be used in a standard player using an adaptor; however, this did not become widespread.

A very similar (but incompatible) cassette format was produced by Hewlett-Packard and Verbatim (the HP82176A Mini Data Cassette) for data storage in their HP82161A tape drive, which, like other minicassettes, did not use a capstan.

Mini-Cassettes in fiction

References

  1. ^ Microcassette Minicassette
  2. ^ http://www.dictation.philips.com/index.php?id=50&no_cache=1&CC=FL&tx_mediarepository_pi2

External links

  • Philips Speech Processing site
  • Brief description of the Hewlett Packard 82161A tape drive
  • Discussion about HP82176A tapes and second-source alternatives
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