Shure C/PEK-3 User Guide
Instruction Manual
for
Phonograph Evaluation Kit
This Stereo Cartridge Analyzer is for use by Qualified Factory Trained personnel only.
Manufactured by
SHURE BROTHERS INCORPORATED
222 Hartrey Avenue
Evanston, Illinois 60204
Copyright
27A1347
1979,
(SH)
Shure Brothers
Inc.
Printed
in
U.S.A.
I
.
Introduction
TABLE OF CONTENTS
PAGE
............................................................
2
II
.
Equipment Checklist
Ill
.
Electronic Equipment Setup and Check
.....................................................
.....................................
TESTING OF CUSTOMER'S SYSTEM
Cleaning and Inspection of the Stylus Tip
Connection of Customer's Equipment
Turntable Speed
Tracking Force and Antiskating Force Adjustment
Channel Orientation. Crosstalk. and Balance Tests
Phase Check
Antiskating Force and Tracking Force Explanation
Antiskating and Tracking Force Optimization using the Trackability Test
Checking Wear of the Shure TTR-103 and TTR-109 11
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2
3
4
5
5
5
6
7
7
8
ADDENDA
Model C/PEK-3/T 12
Guarantee 12
Shipping Instructions 12
Circuit Diagram and Parts List
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13
I.
INTRODUCTION
The Shure Model C/PEK-3 Phonograph Evaluation Kit is designed for use with
stereo magnetic phonograph cartridges. The
the
stereo
capabilities of discrete quadriphonic phonograph cartridges. Note
C/PEK-3 may also be used to test
that (1) the quadriphonic properties of these cartridges must be evaluated
through listening tests, and
(2)
stylus wear may be more critical in discrete quad-
riphonic cartridges; moderate wear that yields acceptable stereo playback may
seriously affect discrete quadriphonic playback.
II.
EQUIPMENT CHECKLIST
The following equipment is necessary for the C/PEK-3:
A. C/PEK-3 Stereo Cartridge Analyzer.
B.
Good quality microscope (with side or ring illumination).
C.
Reference turntable with tone arm (preferably SME) and high quality Shure
phono cartridge.
D.
Oscilloscope with at least 150 mV/cm sensitivity.
E. Stereo amplifier with magnetic phono inputs and a pair of quality speakers.
F.
At least two copies of the Shure TTR-103 and one of the TTR-109.
I
TO OSCILLOSCOPE
111
POWER
120
Q
ON
8
OFF
VAC
e
tB
Fig. 1
e
Q
e
LEFT
ull!1
RIGHT
e
d
LO
HIGH
MI0
INPUT
0
0
LEFT RIGHT
METER ZERO LEVEL
OUT A ADD
IN
A
0 -ZODB
GND.
,
GROUND
IGHT
LEFT
,
&I
-
-
INTEGRATED
STEREO
AMPLIFIER
---I
7
SPEAKER
u
SPEAKER
I
11
\
dL
REFERENCE
TURNTABLE
I
'B"
INPUTS
TEST PANEL
VERTICAL
i
<:;r
-
---A
HORIZONTAL
I
SCOPE
I
I
I
I
lL
MONITOR
OUTPUTS
Pl
I
/---
I'
I
\
1
\
---/
I
I
L
-
-
-
-
CUSTOMER'S
TURNTABLE
OSCILLOSCOPE
0
0
-:-I
Ill. ELECTRONIC EQUIPMENT SETUP AND CHECK
The following steps (A-H) refer to drawings (Fig. 1 and 2):
A. Connect the ground wire from the reference turntable to the binding post
marked
"GND"
on the back of the Test Panel.
B. Plug the left channel output from the reference turntable into "B Left" on
the back of the Test Panel.
C. Plug the right channel output from the reference turntable into "B Right"
on the back of the test panel.
D.
Plug the C/PEK-3 power cord into a 120 Vac (50-60 Hz) outlet.
E. A listening test may be performed by connecting the monitor outputs on the
rear of the test panel to the magnetic phono inputs on a stereo amplifier. It
is recommended that a pair of good quality speakers be used. The volume
control of the stereo amplifier will control the listening volume only, and
will not affect the tests.
F.
Connect the "Vert" output on the back of the test panel to the vertical input
of the oscilloscope.
G.
Connect the "Horiz" output on the back of the test panel to the horizontal
input of the oscilloscope.
H.
On the oscilloscope:
1.
Set horizontal input to external.
2.
Set vertical and horizontal sensitivity to approximately 150 mV/cm.
To test the reference turntable, depress the turntable selector switch on the test
panel
("ln:B"), follow the test sequence, start by testing the turntable speed.
TESTING OF CUSTOMER'S SYSTEM
I.
CLEANING AND INSPECTION OF THE STYLUS TIP
A.
Cleaning the Stylus
For the stylus to trace the groove accurately, it must be clean. To clean the
stylus, use a camel's-hair brush (size No. 2 or smaller), trimmed to a length
lh
no longer than
solution (mixed about 50150) and brush the stylus with a forward motion,
from the rear (terminal end) of the cartridge to the front. Never brush or
wipe the stylus from front to rear or from side to side. The alcohol will
remove any sludge deposits which may have coated the stylus.
Note:
All Shure styli may be cleaned in this way. However, for other makes
of pickups, obtain manufacturer's procedure before using the alco-
hol solution, as permanent damage may result.
B.
Stylus Tip Inspection
The stylus tip can be checked with a microscope having a minimum of 200X
magnification, such as the Shure Stylus Evaluation Kit. The stylus should be
positioned under the lens so that the bottom or record side of the tip is facing
the lens. The tip must be illuminated on the two sides corresponding to the
record groove walls. After focusing the image, the wear can be determined
by comparing the image of the tip to the photographs (Figures4 through 12).
inch. Dip the brush in an ethyl alcohol and distilled water
Caution:
A badly worn tip will drastically reduce the life of the test record,
and it is not advisable to continue with the remaining tests except
le turntable speed check.
4
Fig.
New spherical stylus Worn spherical stylus
Fig. 5
Fig.
6
Severely worn spherical
stylus
Fig.
7
New elliptical stylus
Fig.
8
Worn elliptical stylus
Fig.
9
Severely worn elliptical
stylus
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