SHURE M75-6 (01) PDF DOCUMENT

* The N75-3 stylus may be used to reproduce the standard 78 rpm records. In this case, the amplifier should be set to “Monaural” or “A+B.”

Higher stylus forces within the specified range improve trackability.

M75E TYPE 2 at a stylus force of 1 gram

M75G TYPE 2 at a stylus force of 1 gram

400 Hz. — 20 cm/sec

1,000 Hz. — 28 cm/sec

10,000 Hz. — 18 cm/sec

M75-6 TYPE 2 at a stylus force of 2 grams

M75EJ TYPE 2 at a stylus force of 2 grams

400 Hz. — 28 cm/sec

1,000 Hz. — 35 cm/sec

10,000 Hz. — 20 cm/sec

FREQUENCY RESPONSE: From 20 to 20,000 Hz (cps)

CHANNEL SEPARATION: More than 25 db at 1,000 Hz (cps)

RECOMMENDED LOAD IMPEDANCE: 47,000 ohms per channel

INDUCTANCE: 720 millihenries

D.C. RESISTANCE: 630 ohms

MOUNTING: Standard ½” (12.7 mm) mounting center

WEIGHT: 6 grams

TERMINALS: 4 terminals

GENERAL: The M75 TYPE 2 Series of High Trackability Dynetic phonograph cartridges has been developed for use with all high fidelity amplifiers having magnetic and constant velocity inputs.

To mount the M75 in the Shure-SME Precision Pickup Arm, Model 3009 and 3012, refer to the paragraphs on Cartridge Installation and Balancing in the instruction Manual supplied with the pickup arms.

Recommended needle forces for optimum results are listed under “Specifications.” Forces greater than the indicated “maximum” should not be used.

Connect the “hot” lead of the right channel to terminal “R” and the shield or ground lead of the right channel to terminal “RG.” Connect the “hot” lead of the left channel to terminal “L” and the shield or ground lead of the left channel to “LG.” To prevent “ground loops” and hum, no common connection should be used at the cartridge terminals.

The terminals are identified as follows:

L – LEFT CHANNEL TERMINAL

R – RIGHT CHANNEL TERMINAL

LG – LEFT CHANNEL GROUND TERMINAL

RG – RIGHT CHANNEL GROUND TERMINAL (GROUNDED TO CASE)

For single channel reproduction of Monaural or Stereo recordings, connect the “hot” lead to both “R” and “L” terminals and connect the ground or shield lead to both ground terminals marked “RG” and “LG.”

Do not make solder connections to cartridge terminals. Make all solder connections to terminal jacks provided before slipping them over the terminals.

To clean the stylus, use a camel’s-hair brush (No. 2 size or smaller) dipped lightly in alcohol. The alcohol will remove any sludge deposits which may have coated the stylus tip. The brush bristles should be trimmed to a length no longer than ¼ inch. Always brush the stylus with a forward movement from the rear (terminal end of the cartridge) to the front. Never brush or wipe the stylus from front to back or side to side.

1. Grasp the molded housing of the stylus between your thumb and forefinger.

2. Gently withdraw the stylus by pulling forward out of the cartridge.

3. Grasp the replacement stylus between your thumb and forefinger and insert it into the stylus socket.

4. Press the stylus into the socket until the molded housing of the stylus mates with the cartridge case. Care must be taken not to allow your finger to slip off the molded housing of the stylus, as this may result in damage to the stylus tip or shank.

The Dynetic stylus assembly used in these cartridges is the most critical component. To maintain the original performance standards of your cartridge, be certain that any replacement stylus you buy bears the certification: “This Stereo Dynetic stylus is precision manufactured by Shure Brothers, Inc.”

Avoid inferior imitations, as they will seriously degrade the performance of your cartridge. Laboratory tests of imitation styli have shown that they vary drastically in important performance characteristics such as compliance, tracking ability, and frequency response. In many cases, only a small percentage of imitation styli meet the Shure performance standards. If an imitation Dynetic Stylus is used, the performance of Shure Dynetic cartridges cannot be guaranteed to meet the published Shure specifications. Accept no substitute.