www.SteamPoweredRadio.Com
SPECIFICATIONS
A
cceJJo
ri
es
1-4
Conversion Kir
co:
50 cps operation, 7½ ips
60
cps operation, 7½ ips
50
cps operation, 3¾ ips
60
cps operation, 3-¾
ip
s
Adapror for rack
mounting
Spare parrs kits for:
7
½ ips,
60
cps machine
7 ½ ips,
50
cps machine
3¾
ips,
60
cps machine
3¾ ips,
50
cps machine
Min
or hardware
Kir
s:
9738
9739
9740
974 I
9684-1
9742-l
9742-2
9742-3
9742-4
7802
See Section VI for a complete parrs list.
II. Principles of Operation
If a material capable
of
being magnetized
is
placed in
rh
e prox1
m1ry
of
a magnetic field, rhe molecules of rhe material will be
or
ie
nt
ed
according
to
the
direction of rhe
fi
eld. Any of several methods can be
used
co
produce the magnetic field,
bur
of
most inreresr in magnetic
recording
is
rhar field produced when a current
fl
ows through a coil of
wir
e.
The
current may be
der
ived from a
transducer-for
example, a
microphone converting audio sound waves ro electric current.
Magnetic recording tape consists of finely divided iron-oxide par-
ticles deposit
ed
upon
a plastic backing.
This
rape
is
moved through a
magnetic field in which
rh
e magn
et
izing force
is
alternating, and rhe
iron oxide particles are align
ed
according ro rhe instantaneous direction
and magnitude of
the
fi
eld ( See Fig.
2-1).
TAP
E
s
N s
FLUX
N s
N
:=]
:=@
:~
s N
s
/"\
S
IGNAL
----..--~-~
\J
.--------.-e
F
ig.
2-
1.
Tape Magnetization
Magn
etic
Tape
2-1
To Next Page
Loading...