General
lnformation
and
Precautions
at
Recording
The
tape
The length of a recording tape
as
well as the recording
time, is determined by
the
reel diameter
and the thickness
of
the
base
material.
Tlre use of a 1 or
1%
mil base tape is
recommendcd lor 4
track high fidelity recording.
Polyester
base
tape is
preferred
for
use in humid or extromely dry areas.
Tlrree recording speeds are commonly
used, 3'\/q, and l/2
incl'res
per
second.
71/z
ips is commonly
used for
home high lidelity
recording.
Gcncrally
speaking, the
higher the recording
Good
quality tape wound on
correct
reel
Tape condition
can
be
judged
by the
appearance
when
wound
on
the reel and
viewed
from the side
1) Is it neatly
wound? 2) Is
there steps
or irregularities
in
the winding? 3)
Is the color
of base uniform
as seen
from
the side? 4)
Is the
tape edge smooth?
Spots
seen
sound).
on the edge
indicate
'drop
but'
(skipping
of
speed, tl.re better the
fidelity.
Howevei,
due to the
extreme-
ly
high quality
of the TEAC
tape decks,
recordings of
excellent
quality
can be made
at
the
lower
speeds.
This
provides
maximum tape economy
and extended
playing
time.
The recording time indicated in the
chart below
is
for
one
single
pass
of
the tape, therefore
the total
recording time
will
either
two or four times that
indicated, depending upon
the method of recordins.
Selecting
the tape and
reel
For recording,
new
tape
is not necessarily
needed
as long
as it is of
good quality as
the
erase
head
will erase
the
previous recording
as the
new
recording
is made.
However,
avoid using
tapes
whose coating
is worn,
peeled off
or
stretched.
If the color
ot'the
winding
is different
throughout
the
reel it
is an
indication
that
two different
types
of
tape have
been
spliced
in.
In some
cases,
the color
may
differ
according
to
production
lot even
for
the same
type
tape, or
between
opposite
sides
of the
wound
tape.
Judging
tape condition
by how
it travels
Head
Creases
extending
from the center
positively
indicate
uneven
stretching.
This
is
caused
by diflerences
in
temperature
and
humidity.
\v
Fungus
indicates
old tape
stored
for
a length
of time under
high
humidity.
Sections
where
the splicing
tape has been
applied
are especially
prone to support
fungus
growth.
Tapes
which
snake
up
and
down
between
the guides
and
ove, ihe
heads
will
inevitably
lead to
level
fluctuations
and
azimuth
misalignment.
Head
Pinch roller
Unevenly
stretched
tape
which
travels
either
higher
or
lower
than
the true
path of
the
tape will
in extreme
cases
drift
ofi the
pinch rolle,r.
Head
Capstan
Snaky
motion
of unevenly
stretched
tape indicated
by
arrows.
track
tape
brands on market
Recordins
time
I
aPe
rengtlr
1%
ip\T"*/A
ips
BASF
Agfa
SONY
37Om
1200
ft
30
min. 60 min.
-----l-
550m 1800 lt
45 min.;90 min.
o
190
Standard
Polyester
52
p
l%
mll
sz
u
r4rrltt
35y
lmilLong
play
I
Acetate
L""g
pl.tl
P"lymt.t
Long
piay Polyester
Double
play
35 tt
1 mil
35p
lmil
28 p
',4
mtl
60 min,
8-
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