Sony ecm 23 f service manual

Page 1

BACK-ELECTRET CONDENSER CAPSULE

After intensive research and critical listening tests it be-
came apparent that the tone quality of the microphone
is ultimately determined by the physical characteristics
of the diaphragm material. The best material now avail-
able is a thin polyester film from 431m to 6 {rm in thick-
ness. used in conventional condenser microphones such
as the Sony C-37P and C-47.

Sony engineers have developed a technique to adhere
the electret material to the back plate. and have built a
new electret capsule, called back-electret condenser
capsule, which permits the use of a thin polyester film
of a micronic order of thickness as the diaphragm in-
stead of the thicker film used in the conventional electret
condenser microphone. The construction is as shown
below.

The thinner diaphragm assures high compliance because
of the reduction of its mass, which results in a great im-
provement of the frequency response and directivity at
low frequencies, and improves the transient character-
istics over the entire frequency range. This makes
possible electret condenser microphones having re-
sponse characteristics equivalent to laboratory grade
condenser microphones.

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Sony Corporation
2-599-069-21 (2) Printed in Japan

SONY®

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ELECTRET CONDENSER MICROPHONE

CM-23F

Owners instruction manual

Before operating your microphone, please read this
manual completely to become familiar with all its fea-
tures and capabilities.

Keep this manual handy for future reference.

c 1976 by Sony Corporation

Page 2

TABLE OF CONTENTS

Features ................................................................. 2
Precautions ............................................................ 2
Parts identification .................................................. 3
Battery installation .................................................. 4
Connections ........................................................... 5
Low-cut switch ........................................................ 6
Pad switch ............................................................... 7
Wind screen ............................................................ 7
More about microphone use ..................................... 8
Specifications ......................................................... 9
Back-electret condenser capsule .................. Back cover
FEATURES

OThe ECM-23F utilizes the newly developed back-
electret condenser capsule. which results in a high
quality sound pickup with the excellent transient charac-
teristics over a wide frequency range.

0 The Low-cut switch and Pad switch are incorporated
to permit good sound pickup in almost any circum-
stances.

0 Double wind screen effectively reduces both wind and
pop noise.

PRECAUTIONS

O The microphone should never be dropped or subjected
to an excessive shock.

0 Keep the microphone away from extremely high tem-
perature above 60°C (140F).

olf the microphone is not to be used for a long time.
remove the battery to avoid any possibility of corrosion.
In case of battery leakage, wipe off any deposit left in
the battery compartment.

0 If the microphone head points toward a monitor
speaker and the distance between them is too close.
feedback (howling) may occur. In this event, move the
microphone away from the speaker or reduce the
speaker volume.

. Microphone and recording instruments should be
turned on ten minutes before they are actually used.
This assures stable performance of instruments.

PARTS IDENTIFICATION

Microphone head

Capsule

Low-cut switch

PAD swutch

écontact point

Battery

Grip

Scontact spring

Wind screen