Shure 1946 catalogue phonograph

Page 2

SHURE
lever-Type Cartridges

General Features: The Shure Lever-Type Cartridges listed
here are for replacement of crystal cartridges in current use. They
are widely used by leading manufacturers of radios and phono-
graphs in original equipment. They offer extremely low needle-
point stiffness with high output voltages. They are available in
both steel and aluminum cases and are all furnished with quick,
easy-to-use pin tips that eliminate the need of soldering.

How the Lever-Type Cartridge is Constructed:

The lever-type cartridge is a patented Shure development. As
shown in the illustration, the crystal is mounted in an aluminum

lever. The torque transmitted from the
needle chuck to the crystal by means
of the lever is built up approximately 5
times. This has permitted decreasing
the needle-point stiffness without loss
of output voltage. The lever also pro-
tects the crystal from sudden shock and
strain providing a more rugged car-
tridge for phonograph use. It produces
the highest relative output for given
needle-point compliance. This provides
a distinct advantage for replacing car-
tridges of other types.

Basic Considerations For
Selecting the Proper Re-
placement Cartridge:

1. Be certain that the mounting di-
mensions are the same. Most flat-
type cartridges have standard
mounting and are interchange-
able.

2. Be sure that the output voltage of
the replacement cartridge is equal
to or slightly greater than the out-
put voltage of the cartridge being
replaced.

3. Be sure that the minimum needle
force required is the some or
lower in the cartridge replacing
the original one.

Shure Lever-Type Cartridges will re-
place most Rochelle Salt standard flat-
type cartridges. In addition, they offer
the advantages of lower needle-point
stiffness and higher output voltage.
Where its use is possible, the alumi-
num case cartridge-W57A-also of-
fers the additional advantage of a re-
duction in needle force. Its weight is
only .43 ounce, making it much
lighter than the heavier die-cast car-
tridges weighing from I to 11/, ounces. Installing an aluminum
cartridge in a heavy tone arm or record changer arm can reduce
the needle force of an existing record changer or phonograph by
1/2 to I ounce. In many cases this converts the heavy-weight pickup
into a light-weight pickup and permits the use of permanent-
point needles.

When installing aluminum pickup cartridges, be sure that
the needle force is not reduced too greatly, as might occur if
replacing a heavy cartridge in a counter-balanced arm. If the
needle force is reduced to less than one ounce, some record
changers might not trip properly. In such cases, the standard
steel case-W58A, etc., are recommended.

MODEL CASE REPLACES SHURE OR REPLACES MIN. NEEDLE FORCE VOLTAGE SHPG.WT. CODE
W57A AImn. P87, P93, P878 3/: oz. 1.6 3/: oz. RUGLA
*W57AN AImn. P87, P93, P87B Any StandO'd % oz. 1.6 94 oz. RUGAN
W58A Steel 99-182, P905, P928, W42A 2:33;: 3/: oz. 1.6 1 oz. RUGLU
W59A Steel 99-181, 99-180, W4OA, W4] A of Equal Output 1 oz. 2.5 I oz. RUGAT
W56A Almn P89 l'/s oz. 4.3 3/: oz. RUGUS

*With Sapphire Point Needle