Audio technica atoc 3 owners manual

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.audio-technica.

AT-OC3 [ME Dual Moving Coil Phono

Cartridge Instruction Manual

The AT-OC3 MO is an excellent dual moving-coil (MC) phono cartridge with nigh
cost performance. Read this manual carefully before using the AT-OCB MC .

PCOCCzPure Copper by Ohno
Continuous Casting
process

AT-OC3 MC Features

0 Low moving-mass cantilever system

The AT-OC3 MC uses a Biradial nude-diamond stylus and a hard aluminum
cantilever. Therefore, it is both very light and small. The armatures are
constructed to form an inverted V", and a new type of ceramic adhesive is used

to join them to the cantilever. The use of a vertical stabilizer further increases
tracking stabi ity.

IAT-Oca MC cantilever

L Ch C?" R1 Ch' coil Stylus Coil Vertical stabilizer
' |
1 Sus ' '
pensron wrre
§§> %
' a

The coil is made from PCOCC, a new material which has an extreme purity of

99.997% copper. The terminal pins are PCOCC material. This guarantees a
more refined and purer transmission.

l Vertical section of defferent crystalline structions:

As you can see, while the normal tough pitch copper has crystals which grow
inwardly, and thus generate innumerable vertical crystalline particle field. PCOCC
almost looks like a single crystal.

PCOCC (purity: 99.997%)

Type PCOCC or=c TPC
Purity 99.997 99.995 99.95
Specific gravity 8.942 8.927 8.75

0 Rigid body construction

The mechanical structure of the cartridge consists of a mounting base milled from
a solid block of aluminum and finished with Alumite. This is fixed to a hard plastic
plated housing, increasing overall body rigidity.

Using the AT-OC3 MC

=1) Being extremely careful not to damage the cantilever system, mount the
cartridge body to the headshe I. Do not fully tighten the mounting screws yet.

'2) Note the polarity of the output pins, and attach the leads from the headshell by
fitting the lugs over the pins. Figure A shows the leads for a universal tonearm
headshell. Attach these leads to the cartridge pins of the same color. If the lug fit

is loose, squeeze the lugs slightly before plugging them in. Never solder or apply
heat to these pins.

3 Adjust cartridge overhang. This adjustment will depend on your particular
turntable. Overhang specifications can be found in the turntable instruction
manual. If it is not available, line up the old cartridge/headshell assembly face-to-
face with the new assembly (Fig. 8), and make the adjustment accordingly. An
incorrect overhang will adversely affect tone quality. If possible, this adjustment
should be within it mm of the specified value.

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or is subjected to vibration, use a heavier
value (up to 1.759).

. . Front surface
F'g' A Red (right
channel hot) 9 Insert screws from
White (left ' E cartridge side
channel, hot) . . ,- / Blue (L-) Left
Blue (left Green (right , '/ channel, GND
channel, GND) channel. GND) ,' ' White (L+) Left
Universal tonearm headshell leads - *" channel, hot
(Viewed from front) Green (R-) .
Right
channel, GND .
Red (R+) Right
channel, hot
lf loose, crimp lug slightly.
© Adjust VTF (vertical tracking force). VTF Fig. 8) 1..., mm...
for the AT-OC3 is 1.5 :025 grams, , - chcu'cccccccc
and the 1.59 standard value should
normally be used. However, if your '3 E
turntable is located in a cold environment, -
l -

AT-OC3 MC

(5) Adjust tonearm height (on turntables having this adjustment). Adjust tonearm
pivot base height until the bottom surface of the headshell is parallel with the
surface of the record (as viewed straight across the record). Incorrect tonearm
height can cause the cartridge to rub the record, and othen/vise degrade tone

quality.

6) A step-up transformer or head amp will be required to connect the cartridge to
the amplifier. Audio-Technica offers several step-up transformers that will provide
excellent service. (See the Audio-Technica General Products Catalog.) If a
transformer is used, input impedance should be 20W or more, while ideal input
impedance for a head amp is 1009.

® Always keep the stylus clean. The brush provided should be used to keep the
stylus tip free of dirt and lint. Use of Audio-
Technica stylus cleaners AT607 or AT637
(optional) is highly recommended. When the
cartridge/headshell assembly is removed from
the tonearm, always keep the stylus guard in
emsmmm mm... place, and store it away from heat sources (such
as amplifiers and so on).

6) The stylus is replaced by rep acing the cartridge itself. When the stylus is worn,
take it to your Audio-Technica dealer for replacement at a special price.

0 Accessories provided with the AT-OC3 MCI

Cleaning the stytus

Screwdriver ..................................... 1
Brush .............................................. 1
Cartridge mounting screws
L11 mm ................................. 2
L16 mm ................................. 2
Nuts ................................................. 2

Washers .......................................... 2