Pioneer pl 61 brochure

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PIONEER)

PL- 61

A professional-type stereo turntable for quality home music systems,

featuring a x10 speed DC servo brushless Hall Motor.

The PL-61 Is the stereo turntable with a brushless DC servo
Hall Motor. Thls motor, which utilizes a type at space-age
semi-conductor called Hall elements, Is an ultra-slow drive
motor that Is distinguished by extremely low vibration and
distortion, the two iactors most conductive to quality in a
turntable. Wow and tlutter ol the PL-61 is measured at less
than 0.05% (WRMS) with slgnal-to-noise ratio at better than
55dB. Compared to the more conventional Dc motor, which
power: most turntables available today, the PL-61's brushless
Hail Motor has less electric or mechanical noise, a longer lite
for it has iew mechanical lriction parts. The turntable it powers

is its equal in p -. It features an electronic servo
control, so that speed anges may be achieved electronic-
ally. lt alsoemploys the S-shaped high sensitive static-balance
type ton arm with magnetic anti-skating device and a low
at pacity cord to prevent signal loss in the very high
freqit range for the sound reproduction of tour-channel

records. Complete with induced magnet type cartridge and
diamond stylus, the PL-61 is everything the audiophile has
ever demanded in a prolessional turntable. Available only
lrom Pioneer.

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PL- 61

UNIQUE BRUSHLESS Dc SERVO HALL MOTOR

In a conventional DC drive-motor of most turntables, switch-
ing devices such as brush or commutator are of the mechani-
cal type. In the PL-61, they are Hall elements, an unusual
kind of semiconductors that have been used heretofore only
in very expensive electronic applications. A mass produc-
tion formula/for these devices invented by Pioneer has not
only made Hall elements possible for practical uses, but has
improved their high output voltage characteristics, too. The
advantages of the Hall motor are many: it has large torque,
causes no electric or mechanical noise. It has a longer,
useful life since it has no mechanical friction parts with the
exception of the bearings. The use of Hall elements in the
motor of the PL-61, is responsible for minimum vibration,
a high signal-to-noise ratio and outstanding durability.

x10 SPEED ROTATION (ULTRA-SLOW DRIVE MOTOR)

Because the rotation of the motor of the PL-61 is only x10
speed. compared with the necessary speed of 33-1/3 and
45 rpm of the turntable platter, motor vibration of the turn-
table is extremely Iow. Again. the use of Hall elements is
responsible for this ultra-slow drive motor. even though
it employs the conventional and highly-accurate belt-drive

POLISHED POLYURETHANE BELT

Contributing to the extremely low wow and flutter of the
PL-61 is the use of a polyurethane belt, which connects the
drive motor to the aluminum turntable. The belt is precisely
polished for long hours to assure an even thickness, and
then its materials are totally homogenized for smooth trans-
mission, and so that it is unaffected by aging or heat. This
choice of quality materials is another reason why the PL-61
can offer unusually low distortion with a better than 55dB
signal-to-noise ratio.

ELECTRONIC SERVO CONTROL

In conventional turntables, changes of speed are accom-
plished by changing the diameter of a pully located beneath
the turntable platter surface. In the PL-61, this speed change
is accomplished electronically by electronic circuits, and
speed control within :2% accuracy is possible for both
33-1/3 and 45 rpm.

-._.s-.- «1...».

ELIMINATES FREQUENCY CHANGING

The motor in the PL-61 is the DC type and thus there is no
need to change frequency between 50 or 60Hz when you
move from one area to another. A stroboscope, engraved on
the outer part of turntable platter, indicates both the 50Hz
and 60H: position, and guarantees frequency accuracy.

HIGH SENSITIVE SUPPORT-TYPE TONEARM

Smooth operation free of vibration is ensured with the PL-61
by the new high sensitive support tonearm, that employs a
V-shaped supporter. Used in combination with the low stray
capacity cords, the tonearm delivers an accurate signal from
cartridge to amplifier.

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