Crescent TR-672, TR-673 Schematic
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CRESCENT
MODELS
TR-672,
TR-673
=
The
tween
toward
standard
frequency
phonograph,
the
supply only.
the
Creseent
the two
the
rear
Models
width recording
response
These
recording
Models
above
specifications.
TR
TR-672
672
-
Models
models
of
this manual.
or
in
addition
recorders
time is
5"
7"
TR-6?2
Before
TR-6?2
is
the
amplifiers
and
TR,-673
tape,
quality.
to those
have
two
as follows:
Reel
Size
(600
ft.
(1200
ft.
and
TR-673 are
connecting
GENERAL
and
TR-673
used.
are designed
which doubLes
Recordings
made
direcily
tape
speeds,
3 3/4,,Speed
)
)
designed
your
to
line
Manufacfured
I NFORMATION
are meehanically
Notice
to
record
the
be made
from
3
3/4" and
recorAing
the
I
2
can
hour
hours
to operate
supply, be
by:
alike.
the
di-tference
playback
and
ana
from
microphone.
a radiol
per
? L/2,,
7
I/2,,Speed
L/2
I
hour
on
absolutely
hour
60
-
TR
The major
in
the
two
playing
tJlevision
second.
cycles,
certain
673
schematic
tracks
time
with
Using both
ll0-i20
that it
difference
located
of
material
no loss
receiver,
tracks,
volts,
agrees
be-
AC
with
on
of
or
o
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HOWARD
rw.
sAms
Crescent
fhis
molerial
& co.,
Copydgrtt
ll[TE
5
Industries,
5900
W. Touhy
Chicago 31, Illinois
compiled
ond
lNc.,
.
1957
-
57
All
Righb Rcrcwed
Inc.
published
l
by
INDIANAPOIIS,
INDIANA
stT 350
TOTDER
6
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E
Fast
Forward
5"
reel,
7"
reel,
Fast
Rewind
5"
reel,
7"
reel,
Frequency
3
3/4"
7
L/2"
Power
Output-
2
watts undistored
watts mucimum
3
Inputs-
Microphone,
Radio-Phono, .5
SPEC
Speed-
45
seconds
90
seconds
Speed-
45
seconds
90
secouds
Response
speed,
speed,
IFICATIONS
65
to 6000
65
to 8500
I
Meg
Impedance
Meg
cycle
cycle
Impedance
per
per
second.
seeond.
FIGURE
I
OPERATI
Control-
Speed
Changing speeds
button in
speed
for
3 3/4"
second.
CAUTION:
per
Do not operate in
Off control
Threading
(5)
and
sure
The Tape-
l.
Place a reel of tape on
an empty reel
reel
the
2.
slots
Unwind about 12" of
asectionof thetape
the tape
side
three
in
Insert the
3.
radial
the tape
slots
faces the rear
the reel several turns
secured
reels.
To Record
to the reel
From
NG INSTRUCTIONS
the
"ffptt
second
is
on the
engage the
straight
slot
of the recorder.
free
in the
and all
Microphone-
is
accomplished
or
"Down"
and
"Down"
this control unless
in
the
'rOn"
the right
left
reel
pins
on
from
tape
both hands
with
making
end of the tape into one of the
hub
zure
the empty
of
clockwise,
is
slack
placing
by
position.
lor
7
L/2,'
position.
reel
plate (6)
the reel
the reel. Hold
and
the dull coated
reel. T\rrn
until the
up
taken
between
"flp"
the
plate
making
plates.
insert
tape
the
pet
On-
is
Bias
PAGE
Erase
&
50KC
2
Frequency-.
1.
til
the hrbes to
T\rrn the
a click
is
heard
warm
On-Off-Tone
and
allow
up.
Control
about thirty
clockwise
seconds
un-
for
2. Insert the microphone
jack.
far
as
holding
3. Depress
it
will
it
down.
the
go,
plug
into
the
play-record
control knob
turn clockwise until it locks
"Mike"
(2)
while
FIGURE 2
as
tortion. Ttrrn
treble. Set
cording as
phone".
other
as
which
the recording
described
This typeof recording maynot
sounds
as
result
a
the
radio
tone control to
level
under
"To
be
picked
may
wiII be recorded
maximum
proceed
and
Record From Micro-
be
up by the microphone
satisfactory
on the tape.
with
re-
3
o
I
m
F
Uln
4F
?tru
ol\fl
\m
tez
t-l
-l
F
I
O.
\
(.)
4.
your
mouth
"Volume"
flashes
NOTE:
the microphone
Hold
and
control until the
on the loudest
Model
"magic
located
Knob.
only
during recording) marks
sound
production,
should
rrvrr
on the
extremely
never
completelyclose
To Record From
Recordings from
three
ways:
I.
of
to
Placethe
the radio
speaker. T\rrn the radio
a normal level.
speak
in
about
a normal voice.
six
inches
from
Adjtrst
record level indicator
sounds.
TR6?3 recording level indicator is
indicator
eye"
directly in
A
shaped area
'?V'r
being recorded.
the tape recorder
be
set,
indicator
passages
loud
Radio-
a
microphone
Setting
hrbe.
front of
The
the Play-Record
the
on
the volume of
For undistored
while recording,
tube
or
radio may
about 6" to 12"
it
too high
volume
almost closes
only.
The
fold
over
made
be
volume
wiil cause
indicator is
(visible
eye
re-
control
that the
so
should
"V"
(Overlap).
one
by
in front
control
dis-
the
for
Have a
2.
conductor
clips
across
and
Set
a
above.
cribed
the
insert
radio volume
the
Set
under
the
on
3. Have a
plug
plug
the radio
into
the
phone
across
level and
under
"To
radio
of the
this
To
of
up
set
Record
l. Ifthe
plug
Phono"
the recording as
Microphone",
on
the
jack.
shielded cable
phone plug
other
on one end
end.
Connect
voice eoil terminals
plug
the
cord
into
and
the recording level
"To
Record
shielded
From Microphone".
on one end and the
volume
"Radio-Phono"
proceed
with the
Record From Microphone".
volume and
may
and
tone
be
set anywhere.
From Phonograph-
phonograph
pickup
Settherecording
described under
being
leads, insert
made up
on the radio
the
"Radio-Phono"
tone
controls
and
cable
with a
other
control.
jack.
recording
controls
used has
level
with a
two alligator
and
the alligator clips
as
proceed
two conductor
end
Insert the
the recording
Set
as described
The
has
no effect
phono
a
it
into the
proceed
and
Record
"To
two
speaker
jack.
described
as des-
connected
phone
position
on
type
"Radio-
with
From
PAGE 3
FIGURE 3
Record From
To
1.
Use
Record From Radio"
"To
cording
phone".
as
Teleyision
the
one of
described
2. If thephonographhas
is more
which
pin
the
the
plug
"Radio-Phono"
MPORTANT: The
Dual Track Recording'
The Crescent
the tape width
in
ing
two track
is
aceomplished
l.
of the tape
aII
play-record
2.
full
the
(5)
recording.
reel
and the empty
3.
common,
into the adaptor
jack.
reeorder will
microphone or
is
inserted
is recorded at
recording. This
in the
After a
Removethereels
reel
wound
control
over
and
(2i
reel
Properlythreadthetape
Receiver'
methods
three
and
under
"To
a standard
an adaptor
and
in the
is designed
a
fol,lowing
of tape
on to the
placing
has been
idle.
to
from the
it on the
on the left
described
proceed
Reeord
plug
playback
"Radio-Phono"
so
with
From
pin
is
needed.
adaptor
the
record
not
while
only one-half
that
timel thereby
track operation
two
manner:
recorded,
take-up
reel,
recorder,
right
plate
reel
proceed
and
the
Micro-
type
result-
turn
furning
reel
(6).
with
under
re-
plug
Insert
into
from
plug
a
jack.
i.
the
plate
the
4. After
track
winding,
2 above.
Fast
by
cover.
onthedesired
trol
by
Forward
High-speed
pressing
Movement of
isheldin
recording
of
in locating
seconds.
CAUTION:
this track
has
is ready to
reversing the
Fast Rewind-
And
forward
or
the desired
reel
this
a desired
Do not attempt
Rewind" with
on anything but
these
high
at a
position.
portion
the
to the unit or
recorded the
been
played
be
reels
described
as
reverse can be
(I0)-tqward
tcnob
controls
speed
These are
as
wilI
long
used
of a recording
Forward" or
"Fast
play-record
position,
idle
breaking
of the tape
wind
first
withotlt
in
obtained
head
the
the tape
con-
the
as
primarily
in
a
"Fast
control
as damage
re-
Step
few
(2)
may
result.
Braking-
I,
The
Crescent
automatic
necessity
e.
the
release
automatically
To
the Tape".
brake mechanism
for
2.
To
recorder
the forward
A
1.
Thread
Recording-
Slay
hand braking.
"Stop"
fastforward
on
come
tape
Tape Recorder
(I2),
tape
at anytime
or fast
rewind
or
a
to
stop.
described
as
whicheliminates
control.
when
-
rewind
The
under
contains
operating
-
"Threading
an
the
merely
tape will
PAGE 4
2.
depressing
3.
desired listening level.
To
Use
Plug external
into
"Output
CAUTION:
play-record
T\rrn
until
Adjustthe
An
_Ext.
Jack.
Do not
output
the
it locks.
"Volume"
Speaker-
speaker
"
connect
jack
plug;
transformer
E-{it
To
NOTE:
AnLSplice
Since
Tap_e-
it is impossible to edit
track without affecting
which are
one track only.
to be edited
(2)
and
a
clockwise
"Tone"
conductor
speaker
control
thru athree conductor
three
without
as damaged to the
and tone control
and splice
other, recordings
the
should
without
controls
plug
plug
into
attached
output
may
tube
result.
be limited
F
IGURE 4
for
to
one
to
Erasing
is
on the
without
Recorded Material-
the record
In
automatically
tape.
putting
recording
its
at
set
To Use
Phono"
As A
I.
jack,
Insert
2, Leave the
position.
3.
Speak
"Volume"
4.
Do not have
speaker
or
erased
ff
anything
procedure,
extreme
Public
the microphone
into
and
"Tone"
feedback
a
position
before
it is
desired
on the tape follow
but
counterclockwise
Address
any
Leave
System-
recording
a new
to erase
the
play-record
the microphone
controls
microphone
howl
for
will result.
on
recording
recording
a
the
"Volume"
position.
plug
iuto
the
control
(2)
and adjust the
desired level"
too close to the
tape
the
put
is
normal
control
"Radio-
in
idle
3
o
g
trt
F
la6
1v
PU
on
\rn
tez
'{
{
F
I
o\
\
(.)
I.
portions,
Announcements
etc.
for
Thetape
or by
Unused sections
re-use"
2. Forbestresults,
join
ends together
and trim off
any
maybe
joining
selections
may be
with splicing
excessive
edttedby
cutting out
into
another selluence.
inserted between
of
tape
can
be
cuttapeat a slight
on the
tape
width.
selections,
spliced
glossy
unwanted
together
diagonal,
side
Removing Unit
Fronl
Allservicework except
pressure
sure
the
roller
pad
assembly requires removal of the
carrying case.
ADJUSTMENTS
Casre-
and
adjustment of
cleaning
the head and
of the
head
and
pres-
unit from
PAGE
5
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