Dual 1019 - Pitch-Control; Elevator Action Changer Spindle; Seven Pound-Plus Dynamically Balanced Turntable Platter

PRECISION CEBiGry
460 ENGINEERING FEATUAES
PITCH-CONTROL™’
Each of the four wandard speeds (16, 33, 445, TH
rpm) can be varied over a 6% raunge with the
vernier Pitch-<Controlit™), This unique feature is
especially valuable to serious music listeners, stu-
dents, ihowe recourding onlo tape, and every per:
fectiomist,
Wherever you set the Pitch-Control, speed will
remain abeolutely constant.( You can check it your:
self with the strobe disc supplied.)
How the Pitch-Control Works
This has been achieved by a simple and foolproof
method that dow mor change or aflect motor sapere
ow power in any way, The motor drive pulley (A)
hat four precisely tapered sections, one for cach
speed, as shown in Fig. 18. The idler wheel (B)
is poOUitioned al one of these sections by the apeed
selector switch, §] Then the idler wheel is ruised
and |owered along the section by the Pitch-Control
a The motor drive pulley and the idler wheel
disengage automatically after play, thus prevent-
ing any possibility of flat spots developing on
the idler.
ELEVATOR ACTION'™ CHANGER
SPINOLE
The Flevater-Action changer spindle, which holds
up to ten records offers another exclusive Dual fen-
ture that protects your records againat any posible
image sich a may occur from the use of pusher
arm mochoniams or offset spindles,
Fig. 19 illustrates the four steps of the Elevator-
Action, First, the entire stack rests upon @ three-
pronged platform (4). When the slide switch is
pushed to samt, the weight of the entire stack is
lifted off the bottom record (b), which is then re-
lensed to descend to the turntable (c), The stack
now bowers (d) to awnit the meat change cycle.
This method is foolproof with all records that con-
form to the international standards of the record
indusiry as to the size and concentricity of the
center hold. (On rare occasions when a record does
nv drop properly, il is most likely due to excess
label paper extending into the record hole, which
should be clean.)
SEVEN POUND-PLUS
DYNAMICALLY BALANCED
TURNTABLE PLATTER
If you weren't prepared for over seven pounds of
turntable platter, you were probably surprised as
you lifted it for the first time, Litth wonder, as no
M@her automatic equipment hast a motor required to
reach
full
speed
virtually
instantaneously
with
such
mass
and
thus
provide
the
resulling
superior
fly.
wheel
action
thal
contributes
importantly
to
con-
tancy
of
speed,