Shure TE28J User Guide

222

HARTREY AVE EVANSTON. ILL . CABLE SHUREMICRO

MICROPHONES AND ELECTRONIC COMPONENTS

EVANSTON

PHONE

II.SOOO

CHICAGO

DATA SHEET

TE28J QUARTER TRACK ERASE HEAD

PHONE

sn 3-1600

GENERAL:

designed for quarter-track applications. The double gap design provides a high degree of efficiency. The heads are of rugged compact construction and immune to practically all effects of moisture, temperature, and mechanical vibration.

The face of the highly polished to give excellent tape contact and long operating life.

INSTALLATION:

and may be installed to any mounting plate by using the No.

4-40

threaded stud (attached to head) and a No.

and lockwasher.

Care must be taken to position the head so that the erase

gap is reasonably perpendicular to the length of the tape. The TE28J does not have a means of positioning and guiding the

The Model TE28J is a dual channel erase head

TE28J erase head is carefully contoured and

The Model TE28J is a base mounted head

4-40

hex nut

tape across the head surface. Some external guider will be required. These guides assist the user in adjusting the tape for proper location. To insure proper contact of the tape against the recording surface of the head, pressure pads may be used.

Connections to the erase coils are shown in Figure A.

ERASE TRAM WIDTH

4-40

NC-ZA

THREAD

Figure

SPECIFICATIONS:

IMPEDANCE:

D.C. RESISTANCE: INDUCTANCE: ERASE .CURRENT: ERASE VOLTAGE: TRACK WIDTH: TEST TAPE:

3M190

GUARANTEE:

free from electrical and mechanical defects for a period of

one year from date of shipment from factory, provided all in-

1500

8.9

.061

1825

1975

ohms

inch

ohms at ohms at ohms at

14 26

ma. for

volts for

100

db minimum erasure

Each tape erase head is guaranteed to be

structions are complied with fully.

(3-60

1961,

SHURE

BROTHERS,

INC.

PRINTED

U.S.A.