servomotor to turn the leading capstan, which is belt-coupled to a trailing capstan of a different size. The tape transport uses a direct-drive d.c. Both head elements are contained in a single case and are made from an amorphous (non-crystalline) metal alloy that combines extremely good magnetic characteristics with high wear resistance. They also enable the use of appropriately different head-gap widths for recording (2.5 micrometers) and playback (0.8 Mm). The separate record and playback heads of the RS-B100 allow the user to make instant quality comparisons between source and tape. Other circuit features of the RS-B100 include a direct-coupled play back amplifier utilizing dual FET's (field-effect transistors) for lower noise. The manufacturer's literature says the effects of the phase compensation become more audible when tapes are copied since the cumulative phase distortion is drastically reduced. If nothing else, the circuits permit much more accurate recording and playback of square waves.
The RS-B100 is unique among home cassette decks we have examined in that it contains phase-compensa-tion circuits to correct for these phase shifts. While they may not have immediately obvious sonic advantages, they indicate the extent to which the Technics designers have pondered the problems of cassette recording.įor example, every analog recorder introduces quite extensive phase shifts to the signal (these come mainly from the record and playback equalization circuits). Aside from offering three noise-reduction systems (Dolby B, Dolby C, and dbx), three heads, and a dual-capstan transport, Technic's RS-B100 includes some "hidden" features in its circuitry.
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