10
Accidental Erase/Record Protection
To protect a finished master tape, it is necessary
to punch out both record protect tabs. Even
though you are recording in only one direction,
the 424 MKIII uses the entire width of the tape, as
mentioned above. If, for example, you remove
only one of the tabs, you could accidentally insert
the cassette into the 424 MKIII backwards and
erase all four tracks of the master.
Tape Length
Use the shortest possible tape for a given work. It
is not unusual to play a tape 100 times before you
are finished, so select a cassette length that is as
close as possible to the length of the program
you plan to record. Cassettes C-60 length and
shorter are often made from thicker stock than
longer cassettes.
The tape used in C-120 cassettes is extremely thin
and can cause winding problems, crimping,
wrinkling, and other damage to the oxide coating
of the tape which will destroy your work. Don't
use C-120s in the 424 MKIII.
Remember that at 2X normal speed, and the
"one-side-only" 4-track single direction format
means that you have only one quarter of the
normal play time:
Tape Speed
Cassette
9.5 cm/sec.
4.8 cm/sec.
C-46
11.5 min.
23 min.
C-60
15 min.
30 min.
C-90
22.5 min.
45 min.
(approx.)
Side A
safety tab
Side B
safety tab
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