280B Series

Scully 280B Series User Manual

Scully 280B Series

241 pages

To Next Page

To Next Page

To Previous Page

To Previous Page

Page #12 background image

Loading...

Page #12 background image

General

Information

Model

280B

Table 1-2.

SPECIFICATIONS

(Continued)

Bias

and

Erase

Frequency

160

kHz

Erase Efficiency

Greater

than

75

dB

at

1

kHz

below

500

nWb/m

Remote

Control

Duplicates

transport

controls,

except

that

ATL

defeat

is

provided

by

holding

down

either

of

the

fast

function

buttons.

NOTE:

Specifications

subject

to

change

without

notice

or

obligation.

1.2 TAPE TRANSPORT

The

tape

transport

handles

0.25-inch

(6.35

mm)

or

0.50-inch

(12.70

mm)

magnetic

tape

on

reels

up

to

11.5

inches

(28.2

cm).

Tape

control

functions

in-

clude

tape

take-up

TENSION

(reel-size)

switch;

Fast

Forward

and

Fast

Reverse,

STOP,

START,

and

Edit

pushbuttons;

and

a CAPSTAN

High/Low

speed select

switch.

An

automatic

tape

lifter

(ATL)

is provided

to

minimize

tape

and

head

wear

during

Fast

Forward

(FF)

and

Rewind

(FR)

modes.

For

fast cueing, a

manual

defeat

of

the

ATL

functions

is

also provided.

The

pushbuttons

are

lighted

to

in-

dicate visually

actual

transport

mode

of

operation.

1.3 ELECTRONIC ASSEMBLY

The

electronic assembly

contains:

the

record/play-

back

control

panel

and

amplifier

assemblies; a regula-

tor, bias oscillator, and

amplifier

prin

ted

wiring assem-

bly

(PWA);

and a

permanently

mounted

electronics

motherboard

assembly. An

equalization

PWA

plugs

into

each record/playback

amplifier

PWA Equaliza-

tion

is

switched

automatically

when

tape

.speed is

selected. A

RECORD

READY

switch

on

the

record/

playback

control

panel

allows

recording

on

any

or

all

channels. Each

record/playback

control

panel

con-

tains a vu

meter

that

indicates

playback

or

record

levels.

One

record/playback

control

assembly

is

provi-

ded

for

each

channel.

One

regulator,

bias

oscillator,

and

amplifier

PWA

provides

dc

voltages

and

bias sig-

nals

for

one

or

two

channels. An

additional

bias

Amplifier

PWA

is used

for

four-channel

systems.

1-4

1.4

HEAD

ASSEMBLY

The

head

assembly

contains

three

head

stacks:

erase,

record,

and

playback.

Refer

to

Table 1-1.

1.5

OPTIONAL

AND

ACCESSORY

EQUIPMENT

The

following

optional

and

accessory

equipment

is

available

for

use

with

the

280B

Series Recorders.

•

Remote

Control

Unit,

Figure 1-2:

The

table

model

has a

31-foot

long cable

with

connec-

tor

P1l1

installed.

The

panel

mount

configu-

ation

includes

mating

connectors

and

pin

ter-

minals

for

a cable

of

the

desired

length

up

to

50

feet.

•

Capstan

servo

system

option:

Provides in-

creased speed

accuracy,

less

flutter

and

wow,

and

improved

frequency

response.

The

servo

system

is designed

around

a

printed

circuit

motor.

A

crystal

oscillator provides

the

basic

tape

speed

reference

frequency

with

an

opti-

cal

tachometer

serving as

the

functional

reference.

• Varisync Model VS-76: Varies

tape

speed

from

any

of

the

preset

speeds

(3.75,

7.5,

15

or

30

in/s)

by

+50%

to

-25%

and

can

lock

the

capstan

motor

speed

to

a

pre-recorded

control

track.

The

Varisync accessory

can

Table of Contents

Questions and Answers:

Need help?

Do you have a question about the Scully 280B Series and is the answer not in the manual?

Scully 280B Series Specifications

General

Brand	Scully
Model	280B Series
Category	Turntable
Language	English