Nagra E User manual

INAGRA~

INSTRUCTION

MANUAL

KUDELSKI

SA

.1033

CHESEAUX

SWITZERLAND

-----

-

---------------

NAGRA

E

PORTABLE

ANALOGUE

AUDIO

TAPE RECORDER

INSTRUCTION

MANUAL

(KSA

code

No. 20 02002 1

51

)

Kudelsl<i

SA

NAGRA

TIIpEI

Reeoolll<

Manufacture<

OH-l033 Cheseau. I

SWITZE

RLA

ND

pI'ooe (021) 731 21 21

lelel< A59 302

nBgI

ch

telefa><

(02;1)731 41

55

May 1919

ed

ition

N/lGI1/1, KUD€L8KI,

N

~OP

lLO

T

,

NEOPILOTTON

N/l

GI1/1

81/1TIC,

NII

GRI\FIIX

a,er

egi

ster

'"

j,

aoo

_

"",

rk•.properly

01

KUO

H8K1

8

./1

NAORA Tape

Rscor

,,"'

M

anu

t

actur

...

NAGRA I KUDELSKI certifies

that this instrumenl ""as thomughjy inspected and lesled

prkJr

to

leaving our factory and

is in

accor<la.r<:e

""ilh

1I1e

data{jiven in

II>e

accompanying lest sheel.

We

lIW1r8ntoe

1I1e

products ot our o""n manutactu

'e

against

""y

defact arising

fwm

faulty

mal"\Ufacl

ure

lor a

peIiod

of ona year from the date of delivery. This gu. r. nt.... covers lhe ,epair

ot

<:onfkmad def....,ls

or.

~

n....,..,ssa

ry. the repleo:amenl

ot

the fauny parts. excluding " othar indemnilies.

All

troi!t>l

co51s~

as wall as customs duty and other possible charges,

.'"

at 1he customer's espense.

Our lIUlifanlee remains valid

.,

lhe a

.a

nt of eme'9!"'CYrapairs or modificalions being

made

by lha

u_

Ho..av.... ""a

r_I'\Ia

lhe 'ighl

lO

;,w

Dic

a the

ClIS

tomer for any damage caused by an unqualifi9d person

or a lalse manoeuvre by the op8fator.

We decline any ras

fXI

nsitmry klr

an

~

and all damages '6sultitlg,

li

rOCll

y or

indorecll

y, kom lhe use ot oor

prO

lJuClS.

Otller products sokl by KUDELSKI

SA

ara

c~

red

by \flO gUllfanlee d auses

of

Ill";

, raspective

manufaclurers. Wa decline any respoosi

rnl

ity lor damaqes 'esulling from the use of meee products.

Wa

'e_va

lha rig

hl

to moddy me P'oduct and I <)I"

lila

specilications wilhout notice.

CONTROLS

TABLE OF CONTENTS

CHAPTER 1

CHAPTER 2

CHAPTER 3

PREPARATION

1,1. P

owor

supply

1.2. Thr

Nd

i

r>g

the rape

'.

3. Sp

e""

and reels

OPERATION

2.1. Meter reading

2.2.

Po

te ntiometer pos<liooing

2.3. sa

fety

eaten

2.4. Main IIJnctioo selector

2.5. Con

nec

tions

2.6. Rocordi"ll

2.7. Playback

MAINTENANCE

Page 1

Page 3

Pag

" 11

3.1. Batlef'es

3.2. Cloooirlg

the magn

et

ic heads

3.3. Access to tho interior

01

the Nagre E

3.4 SimJlkllault finding

CHAPTER 4

CA

LI

BRATION

Page

11

4.1.

Ca

tibfot

"'"

of the playback chain

4.2. CaI

Obra

tion of the record chain

CHAPTER 5

CHAPTER 6

NAGRA E-L WITH PILOT

5.1. DeSct,pU

OI1

5.2. RecOfdi

"ll

5 3 Playback

5,4, AdjuslmOOI

5.5.

Nagra

E-L bl

oc\<

diagram

SP

ECIFICATIONS

SynopbC

doa

gram

Coo!igurat

or

Pa

lJ"

21

Page 27

P

ag

e 33

"'"

"

NAGRA

E

CONTROLS

, ,

3

, ,

e

r a

9

,

a

•

,

e

,

e

,

tu

l

a~

le

rlSioo rol

le<

Supply

'ee

l

Era

""

head

Star

"l

i_

roller w

rt

h strDboOC<lp<!

fl

ecor

ding

...

ad

Play

bac

k Mead

Pi""t>-wheel

T

...

""

,""I

Pi

ncl>-w

hee

l cont,,,"

"'

er

Ri

gh

i 1

""

0;

00

roller

ra

..

rs

re

"

ta

eu

ar

"

Gal

vano<oe

le,

Ca

l;Jora

t

ion

$C'_

V

Q

I~

line

i

npu

t

Mic"'lj'hooe fX'Ie

mi<>meter

L_

inpLII& playbaCk

POI

eoriomel",

Tape-<l

ir<lCl

s"otch

l<>ud>peaker . " j

le1l

AA

a

on

luncMns

..,

1e<

1

",

HeadptJonc oulpul

Ban

<l<

Vtesl s...tch

"

tz

33

"

U

no>

inp

ut 1

""

"""

1)

es

Po

we

r pack

c~

'"

"

M..... inpul

as

Power

mOOo

oeIoctor

$Wi

tch

"

So.<

IoclO

ng screw

aa

60><

loc

k;,,\!

SCf

_

"

.o.q.nvnetri<:al

~

""

""lplll

n

M""

l>J)llone

sel0ct0r sWItch

(symmetrical

<>n

option)

Chapter 1

PREPARATION

EIMqo1e. 0/1

~

eels

""

e...

lfllIt

sliding

..-:1'1

26 ill .... .

-....-

~ ~

Turn _

the

NAGRA E

....

.....-

_

30

bI'

.......,;"g

fIoang

sctew$

29

end

32.

f'IIOI

_

1~

D-ty

pe

~

.

IR20) 0'

liIIewl

2fJ D-

Iype

~

eels,

....

.......

direction,

as

indicated on

Ih<I

-.....

01

....

COI'hj)IittmBnI. /I is

~

to place

...

bMIer

.c

aacIl

&nd firs!, and then to insert

the

Olhers in

""-

PI_

bac

k c

O'o'

er

30

inl0 place lacuring it

..

,Ill

1IC.~

a

211

and 32 and lurn 1ha NAGRA e

O\I

a•

.,.

,.

S&1

mein luoctions

seJec10r

10 ' PLAYBACK" or

"RE

COR

O· and ch&ck

volIag&

by

~es8inO

down

'Ball

,

Test

" ,

Wl

lCt1

22

. With

new

cells.

"""""

13

8houId

$hc>w

18 v

ce

ee lower _ . H

II>e

f\lHtdIe

.......

n.

below 11 V.

II>e

~

o

l

l"O"

i.

insu'h;:;erlllo

~

"'"

NAGRA

E-

c

•

~.I

pow&!'

supply

'Throw

.-:tl

26

10 'ExIemaI",

The

P<W3AA

E can

also

be

jlOIIo('It8d tIy

IhIo

"'TN

.........

po.-

~

which

ca

....... 10

qlUI

2'S

Pow.

PecIl.

r-

_

~

8S

SO

"g

· Ban. TM1'

$oIoII;fI 22,

.-

01

""'*'

13

......

lI"

10

....

t.- rigIt. n

dag&

so

q:Fd

is

8PP'O"""'-Y

" v.

,."

•

ill

poe'

....

to

c:hecl<

IlwI

vol!aOt

~

ot

....

NAGRA

e

(Ball

. Test

22

)

at

any _ .

no

"""*

w/'IaI:

Iunc1Jon

has

'-"

seIec1

ed

.

"

,

"

1.2. THREADING THE TAPE

1.3. SPEED AND REELS

2

Rele

",

e

pjr>chw

heel 7 by

P<J

ll

ing lorward

ba

~

r

9.

Place

Ih

..

lu~

r

ee

l on

tI>e

1,,

11

and the ..mply

r

~

00 me righl hand sida. Secu re ltiom. Thread

tI>e

taj>e around tensioorollers 1

ar>d

10, and

wOnd

su

ffi

cient lape 00 lhe empty reel. Eng

"!l"

the

pirlctlwh

e<>1

by pushing

leve,

9 hack inle its

crig

inal

pos

lDon

: il should snap sha,ply into plac

...

.

Th8 recorder is

row

ready 10operal...

N6 :

Wh

ao threading the

tape

.

""

sU

'"

thal the oxide

lay

er

laces

lhe heads.

The

rac<>,d

cha,n

01

Ihe

NAGR

A E is

e<Wibra

ted at

t

hEt

laclory w

ittl

a

g

i

~

n

ty

pe

of tape, II anolher

type

of

lape is

10

be

used

, il will

t>e

r'IIlCass

ary

10

re-ca

l.

b<a

l.. lhe machine

'"

exp

lai

ned in Chapter

4,2.

11th..

NA

G

RA

E remains unused lor a long period

01

lime. laver 9 should not be loft in th" rele

ased

posihon as lhe clul

dl

might d..I..,;"ral" and

become t

hEt

S

llU

rco of

noi

sy r

ew<n

ding.

The NAGRA

E is a single-speed re

cord

er

avai

loble

either in 19 cmIs (7

112

ips) or 9.5 cmls

(3.75 ips)

~rsoi

n,

The

",

cord,ng limes gilten below are an indicahon

only and cormspond to 3

5J1

long play l

ape

,

"'

.

9 5 cmls

HI emfs

Cover Closed

t27 mm 47 min.

24 m

in,

with

cs

er

178mm

1

"34

min.

47 min_

with OGB 267 mm 2h12 m'n.

moe

min.

standa,d 50

Jl

la

p"

:

Reels

9.5 cmls

19 emfs

Covar closed 127 mm 32

mi

n. 16 min.

wil

h OSET

178 mm

11

h03

min

. 32 min.

wilh OG6 26

7m

m 1h36 n un. 48 min

The

me

ter has

two

gradl.l'll<>d scales. 009 in

"GIIs

and

It\El

other in decibels. " is used

to

<:hed< the

supply voltage, to adjust

It\El

input seosil;"ity. to

eaect a

fOug

h ch

9Ck

of the

c

~cuits

and

10

calibfate Ihe record and playback chains.

M

echan

ical

zero

setti

ng

ay

me

ans

of

adj

ustment

sc'ew

14 Ihe

mod

ulomotar n_ le can

be

moved 10 the lelt

or

10 the right

and

thus positioned exactly at the

beg

inning of the scale.

Bal;lery cheek

LI1W9'

scale. The thick part of the

~

Ie

indOcata"

II>e

mini

mum

and m

e.

imun levels of the oopply

voltage

(with batl9<ies}.

Input

"e

ns

ltlll

ll

y

Uppa.

scale. The

NAGRA

E meter lunetm s

as

a

mod

"'ome

ter, i.e.

~

sllows tho peak value. with

fast use

tme

and intagr

atocl

fall of the recorded

"'9'18

1.

K incOfporateS a memory device

mak

ing it

poss

ible to

,ead

the VSlU9 displayed. As is

cu

S1(l1J1ary

with Vl!'met

ers

, graduation is only

trom

-20

dB 10 +3 ee.

Low9r

scale. The NAGR/\ E is

ocau

ippad

w<

lh its

own checking device. A

1'1008

p1ac9d

in.

KIa

the

'acotd", pormits a quick

dIec~

01

all circu;ls. The

\/Ol

taga rnaasuroo is shown 00 tha

JOOl9

r (sea

Chap'

'''

3.3.).

Ca

litlrallon

of

1

1>8

rec:o

r<klr

UpiXl<

sca

le. This scale is used lor c

albalioo

{soo Chapler 4)

Chapler

2

OPERATION

2.1. METER

REA

DING

S

3

2.2

. POTENTIOMETER POSITIONING

"p

,'j'

"

,h

':'

LIN

E

INP

UT

J

& PLAYBACK

2.3. SAFeTY CATCH

4

The hW NAG

RA

E potentiometers

l(j

and

17 are graduated d

iffe

rent ly.

Potentiometer

16

micropnone

Graduated Irom

16

0 to 71 dB. This

sc

ale

e.

pH!sses the sound lev

....

in dB for a recorded

level of 0 dB. I.e a

32

0 n

WM11

flu

•.

Tho

thick

patt ot the scale

cO

Hesp

<>

nds to t

he

beSl

lIP"

fatiOrllli

la

nge oI lhe micro

ph<l

ne

p'e

a"'ll

lilier.

If sensilillilV must

be increased as tar as belwoon

82

ar>d

71 dB. lhe backgroond noise will nt} klll

gar

be

negli

g<

ble

WIth

....

Specf lO

tape

n

";

se. How&ver.

d se,,,. tlvity must

be

<!&

c,eased to

betw

oon

125

sod

150

dB in order to ,eco,d at 0 dB on the

m<>dulom"'

er, then eeiput signai is too strong. It

is tharelor& necessary either 10 relluce tt

19

si{lflal

lIov

..

by maans of an a

ll

en

""""

, providoo the

microphone

it

se

~

is not saturated.

or

to swifch the

iopul to '" less

s

""

si

~v e

posoIioo

.

Potenti

ometer

17

Un

.. ln

put

& Playba

ck

Graduated trom - 70 to +12 dB. II a

la

pe

record/ld at

0 dB

"",

91

. La. a 320 nWblm ftux, is

played

bad<

with the potootiomrrtar at 0 dB.

rt

will

giv" a nominal signal

01

0.94 V at unbalanced h.....

output 24. The

moduk>met

er will

",

ad 0 dB. " the

pOlentiomal" r is

sal

10 + 12 dB fh" modulomater

w

oll

indicllle 0 dB tor a signal rocorded III

-12

dB.

AS a safety precaution on the NAGRA E. main

lunction selector 20 is equipped with two slotted

bunons. one is red. fhe other

wt>j

te.

During transportafion. : to avoid inadvf!rtent

op<lrat

oon

ot the recorder, it is possibl"

10

lock the

selool

<>r

in STOP position by pressing the wM "

buttoo

and

tU<

ning

~

90" .

Ouri"il playback or editing :

10

avoid accitltmtally

a

w~

~hing

10

r

e

~

or

d

,

it is possible

10

use

Ihe

r

OO

buttoo in the same way.

The

main selector will

tum freely bul

~

WIl

l

be

impos

sob

l.. to

s

w

~ch

it to

~"'

S I I••

20

hils

so

.

p<*bOi

l$ lor !he

k*>-.g

""

......

OS

:

S

ToP

:

p""""""

Sl4'PlJ

dI

.....

edoid

By

"-"'-"II

dtd

aise

:

TEST :

'"

is Mol lor '_

""

00:

........

is

nat

.....-.0.

~

13 lItIOWlIlhe

~

fA

...

s>gNI

thus

maU'lO

c possollla 10

...,....,

...

~

.-;lMIy

.

RE

COR

D : T

I>II

tape

os

•......-.g; C is

JirSl

..

ased

end

lhM

,ocorded.

REFERENCE SIGN

Al

AND CALIBRATIO

N:

Po

..

liol'l allowing the calibration 01 tho r

&ClJr(l

ct>IIin

. (See ChapUII 4.2.).

PLAYBACK :

ll>a

sognal

'-'

• . .

...

I

'*'

a

...

~_

........

car>

be

rwaO&d

II)

trwough

...

buill....

ka

I..

*_ by

"'

- 9

~

19

II)

!he

0-

"4

' •

.,mtd.

~

..

adjusl

ed

by

mean. of poten_

..

17

"Unfl

Input &

~.

p<Mding "

T_

Drncr" .

.....

18 is

on

the

"

One!"

posiboo

~

FAS

T : ltios posi\ioO.

pem'IItI

~

--.I

(

......

I

f I '

ed

) or

last

Ioward

~

9

tIf"9'I9Ild

). In

lui

Iorwilfd. Ihe

11;

'

""

*. II

<IIscOOrIe<:te<

.

1II

.

~

is w ailable

headpfIooes

aulpJt

21.

2.4. MAIN

FUNCT

ION

SLECTD

R

5

:U

. CONNECTIONS

So>"

(:OrlnK\1IO'S

on

bee

SIdes

of !he ,........

d&o

perm

il

1M

use 01 valK)I,l'

ac:c..

soriGs for

........

~'"

Of pI8ytJ¥k.

t.-.

"'PUt

11

(temaIe

Tuc:fIoII

ikloIe

l

e::un.nt

....

I'lpI.t,

IewI

of

...tctl

• q II d

willi

polell!ioo•• •

17

"tile

~

&

~

,"-d<

•.

a....

1oC

...

isCicI :

.......,

-

Ma.

imum

leII

eI

Source impedance

3 ..... kir

OdB

ec

c

140 pA

high.er lhilnl 1«1

Mik"

inpul

12 [XLA :l-poIol

t.l

i~

.

Input, l"v,,1 of which il

Id

jusl"

d b,

0'Ilicr0ph0nG

poItO'llioo"etBf 1

1>

. ThrI '

npul

<:an

be

I$pled

» dilt9ren1

types

ot

mic:ropho

nos

by

......

of slMld'l 33 on

...

......

rsil\e oJ th&

._

0.

.

,

-.

u.~

.

""

."

.•._.

/ ".

_-

~

(-.-

...

.-

....

.

...

.-

-1." ,_ .....

i

- ·_···_·

-.

·

...

,

...

-.

_-

'+.

--._-

,."-

--

.

-

_

._

-

~

-

~

..

-

_

._

..

~-

_

.•

_

..

~

-

•

c_

•.

IN<o ' T'"

~lC8

SensiMy

~

rm

oub

it;;oll

l«l

~

-

Seo

_ity

~

...

Sourco

.

,

~"""

ey....,

MOo

"

200

Q

...

.......

-

. 12

V.

4 mV

I*'

Jlbar

m.

2

~

mV

bOdB

l32O

"

~)

.. ",V b OdB

(

51

0

~1

1

200

mV

. 12 V, 2 mVp&< llbar

m.

1.26 mV lor 0 dB

(

320

nWbl'm)

2mV101'0

dB

(610 nWbl'mj

ecc

m'

1

0.0

25mVlor

OdB

(320

nVtbm

)

"

mV

bOdB

(5

10

nWb\on

j

1

200

mV

hig/W

~

I

.e

)

10 . 0

0-138 mV Iof 0 dB

(

320

"""'bom)

0.22 mV for0 dB

(510 nlM>m)

100 mV

VoItal)8 line inpul 15 (t:>anaM

pluQ

if

T

he

......

is adjusted by pOI",,!iomeler 17 " lJnIo

Inpul &

1'Iaybeocl<

••

0." V

RM

S lor 0 dB

150

kG

reo

v

0.56 II FlMS lor 50 Q

0." II RUS .... 600 n

.....

-

As"

,••_

ieII

lJnIo

OuIpuIlM

~

plI,ogs

)

Cha

....

......

:

O-

llofVIWS

....

320n

'Nb/m

U

611

RMS

lor 5

'0

nWbl'n

,..s:

It

stw:Ud

boo

~

.......

broIOcMII I\.al _

.t;onda«! i

....,.

3ZO

nWbhn

lor mo

no

'

.....

duI.

;

;,

"'"

....

.

.....

del IS

deI:

,.

ed

......

-......Ho

••

.•

iI-V.-y

D

adjull

ltlii

....

D 510 n'Nblm

bJ

~

"'

'Il

...

~

n ... ,

.f

..

. a

geoe<aror

.

....

impIow>g

..

IOJ_

.-

bJ

.. dB,

0I;Jl0cA

as

.,....,

._

ieII

....

~...,

boo

replacAd

toy

a

~

....

0UIPUl

.....

11

1600 G

1.

56

VI600 n

E>

ternal power

SUllllfY

.

Suppty

volI"Il" must

be

l)a

tw

-.

- 10.7

et

-35

II.

AccePl

.b18

flppIe

is

to

.7

V,

7

:iI

.s.

RECORDING

W

ith

mi

cro

pho

ne

"

Co

noact

the m

icro

phDrifl to inpul 12

and

sw

itc

h

33

10

cDf<9POJ'd

to th

...

Iyp9

of mik&

us&<:!;

main

lunc1ion

se/9cID<

20 on TEST, Adj

ust

th8

inpll

l

5Ilnsilivity with pot

...

l1liDm&lef 16. " a headSel is

availabj

e. d is also possib/9 to evajuate the quality

of th8

BOUnd

,ecording

and del&fmine

me

beSI

positioning of me mierophDnll,

Tu

rn

S9

1",,10<

20 to

RECORD

. The lape is

ru

nn

ing. Anything alteildy

'6OOf

dlld on th8 Iap&

will be first erased as d runs across erase head 3.

M th8

headphones

Dulpul

two

lYP8S

of signals

can

00

he

ard. Whllfl "T

ape

-[);,6I'1" swi

lch

is

on

"[);rect". th

...

signal being ,

eoord<o

d

can

be

hea<d;

wh.......s

..

posiOOn

"Tape". th8 signal heard is

....

ady

reoord&d

on the ta

p"

and is ,e

po-OOlJCed

by

the

playback head. Comparison 01 t

he

.... lw<l

signala

peI"fTVls

an

...

. alu800n of th8

QUll

l

ity

of

th8

,,,,,o

rding

.

and

in

pat1iC

ulBf Ilflables

del

9Clion

01

laults,

such

as

difl

on a

head

or

a lape threaded

the wrong

w

Wf

.

H8 :

The

tape

can

be

,ewound

Ieavi"il main

se

lecl

O,

20 on RECORD, but r&leasing WW

ll'

9 :

Howeve"

lihouId th8

tape

accidentally lOuch erase head 3

or

record head 5,

~

w

","d

be

partially ....

ased

With

Mne

input

Connect the signal sou

rce

to the adequa

1El

line

input 11 or 15 <see

Cha

p1ef 2.5.). Selactor 20 on

TES

T

and

adjust th8 sensitiv

ity

with potentio-

met

er

11.

•

To

rucl

a ........dod

tape

.

\IJ

m S8le<:U'

ZO

10

"PLAVBACK". To st

the

ploI\'baC

k laval,

........

18

1O

"

0irecI"

use

lJC*li

illU

••

'. 17. •

18

is

on "T

APF'.

the

pIayf'a'*

..,....

.......

n.

~

.

TN

Iig"lll

read

..

lIIso

av_

at

l

oMdpto

...

0UlPA 21 ......

ill

asy,""Wllli

ical

Ina

00IPUl

2. To

sw*:tI

on Ih9

~

...

b risl

pt

· ,

_

......

1$110"

b

"'Sl::

I

k

•

.,....,.

.

.•

"

••

1 T

..

IO.........,arape~I

Jl

I

h20

on "

PLt

YBACK"

....... I

III

..,..lI

.

n.

it

pm_

it

the

.

ecoo

<l&o

is

eqo

iqlad

_ a

Iloaling

outpuI600

0 , • .• V

...

1

.56

V lopllon),

Wi-.

ma.n

.,

lsc

lOo

on

"PlAV8ACK" and _ II

IllghIIy . sll as

ed

00

It\iII

lh9

Iapo

it

001

~

....

tepO'\8l" can

....

. a miaophot.

~....,

.

TN

tlICOI'<InlI

C*l

lh8n

be

nns""ned

lly

simPY

lully

-.g~

leY

....

9. A

convnen

t

....

r by tlla

.

eportaI

ov.-

ilia

..coning

is at

""

pos.sibIa

by

*"",

hng

pol

~

t

...

s 16 and 11.

Conn

ection

with

otto....eql,llpmenl

..........

the

NAGRA

E

is

so.oppIied

I<Om

an

ATN

its

....

Is

Mi"

lIfIPI'd

10 th8I

cl

...

.......

. II

it

ia

~

an

~

fie

-..-.

cl

"""""" ,. alio

Wi

oow;W

10Ihat

0I1h9

mains

" "

<1IiSftOA""'"

cl

..

aogNiI can

prto9IliI"lIIa

...

_,,

:

'-*

_ cl

....

-"'ing

loop ec t:wmed

the

....

01

the

N.t.GAA

_

not

be

eQClly

III

!he

_

p:*-

........

_

cl

..

,

~

.

T "'8V _ due

10 _

~

--...a loop

or

due

III

_ _

n'IIIQO'*Iic

iekla-

e-

it

Iha

-.lh

cl

...

NAGRA

is

cifaetl1

COl

......

1Ud

to

..

_

cl

the

...........

Wi"idI.cIi¥ily

cl

Ihis COO'«:liOi•

......

no!

be

adeq

.

..

. 10 SUW'l'SS

.........

lliIIeo

_o::a

.

nw

.'41

1811

"*'

_

is."

c...-

opnon,

Ill

....

two

poMI"

diedes back4O-back

..

the

c:onntICtion

bel

.M

..

A

TN

_

and

!he mains

__

TN

doodee

do

no!

condUCI below

.....

........,.

I V; trIey

lui

pm!eCIlDn /rom

ItMI

"...,

1""'"

cl

fKlII

do

001

......--....

..

miIMlII

......

.

lJrlIOI1

unale

lr

thio meltlod has

not

\'8l

_ "

iolrOduclld in

V"""""

nalKlnal ,eguta

lO'li'l

S

2.7. PLAVBACK

•

.

\..

(,

SX

II

"

..

" "

zt

,

10

AnOlller solulion is to have a differential input on

the

amplifier. ThIs is the case with the DSM

mon

ito

r and, in ge

ne

rel with pr

ot

essio

nal

equipmenrs. Two wires are sutticioot to make ttle

conna<:tion, the eartM

baing Sbepped through ttle

main...

On

the

o!hor hand, in the case

01

ball9ry

opetahon a third earth wire is required.

II the NAGRA E is connected to an unbalanced

ilIf1

pt!;er, the problem

Ca

n

be

minimized by !he

use

01

short earth connections to the amplilier

and

me

ATN; by keepi

nglhe

mains wires of

the

amphfier and

01

the

ATN as parallel

as

possible 10

evoid formation 01 a big lO

op

.

Do not torget that

It>e

microphone input

ot

the

NAGRA E is balanced

and

used as Iina input lor

low94s

between 2.5 and 1200 mV. Thus the

operation is

a1

w

aVS

car,ied our using 3 wi'es, one

connecting

the

earth of

the

equiprn9nr and the

OllI

e<

1\1/

0 transmining Ihe signal. It the source is

unbaIanc.:l,

0fI8

at the inpur wi'as should

be

connected to its earth and thu other

008

to its

actiw

termioal. It

thelwO

oqoipments are already

connected

10a

cornnlOfl

8arth, the first earth wire

ohoukt be cut.

Ri

s.

01

e~

lyte

l

eak

age

Des

pit

e the eIlorts

01

e

el

manulact",

ers, there

always exists a risk

01

laakago

01

the el

9Crol

yta,

espacially

from flat ba\1erias.

Such

a leakage may

cau

se

serious damage 10

lha

NAMA

, aspac

ialy

il

~

is

""pi

In

~ s

carrying

case

wh

dl

/

91

ains the

corrosiv(Iliquid.

Thus

:

il.

lor

any Ioogtll

01

time, you do

not

inWnd

lo

use

yow

NAGRA cn balleries, ,amolia

\ham

.

ff you

PQ

your battaries in a froo:zllf, you

practically stcD

Iheif

seIf·dlscharge.

whan your baIler",s are llal, mmove them

immediately.

~

a leakaga occurs. wash with water. The

NAG

RA

sutlers

much

less from watel' than

1/OnI

the electrolyte 01

too

balleries.

In ","dar 10record and playback, the t

al'"

must

be

in a perfect contact wilh the heads. U

ntoot

tJna

tely,

cartain tapes lose some

01

the ~

oxide which may

then sa

llla

on

the heads. T

he

playback Ih

oo

becomes muffled and the ,ecording distorted.

Fcrtunstely, inspaction

of the haads is

""'y

easy

in the

NAGRA

E. II is sufficient 10 inspocI the

recorder

without the

tapa

. The

ad

ive part

01

the

head is

white and polished like a m

~fO

r;

it black or

bfc>wn

traces

are

llisibla

there

.

~

is

neces

sa

'Y 10

remove them,

II ,s not recomroondoo

10

n.t>

the heads when dry,

they should

be

cteaoad with a piece

01

welled

OOlI

on.

A1coh<.>1

is

good

, but water is accaptsble

t

"",

In urgoot cases the COfnllf cl a hai\dl<"'"Chlel,

wetted with some saliva. can be used. On

It>e

other hand, strong

sot...

ents, tike trichlorethylene

and similar liquids

must

never

be

used, as they

~ausa

the apoxy resins used in the manufacture

otthe haads 10 expalld.

Chapter

3

MAINTENANCE

3.1. BA

TT

ERIES

3.2.

CLEA

NtNG

THE

M

AGNETI

C

HEA

DS

11

3.,. ACCESS TO THE

INURloq

Of'

THE

.......

12

To open Ihe NAGRA E two

Iafoe

~

23

and

21. thould

be

uncIone by •

10'

_ _

pushed

inlo

..

I

......

deo

in

...,.

10 _

!he

1ocII,

n-

...

~

deck

..

"PM

"'"

beong

hingeod

.;0:

........

-tWld

end.

• "

de-.

nol,

~

23

_

27 I

~

more

8I'd

puIh

1>IrOIr. •

"""

......,.._

......

IW

I¥

.

lie

ron

..

bill

"'5idI

8I'd it

..

be

'*

!

...,

kI

~

.,

......

n.

IlUl$

_

yeIaw

bitt

2. rnm long

wiI'I

two

~

sIOI$. The

d'IamIer

sholAd

be

tuned

to.ard$

\IlOI

outsidu of

"'_<lei

Once the

teCOI'

der is open you

WI

~

~\lft

the main

c;rcuit board. Th"

co'CUI1

dl

ag'am

and bag of

spa'a

jllIir'l

~

....

...-.cIama

l th

1hili

baIw>d

the

ba

tl&ry

~,

To

cot

.....

iICC8~

IIO

!he spiOI"1lS

~

is

necess.y 10 lift ItIa

main

CO'cuil

board which is

hngad

IIIOou

its

......

aOga. The

fIo

oot of !he drcuiI

"'*d

II

r;"oo

by

two

~

.

wNcf>

must

be

.-

bel

,,",

"'"

cifcul

tJo.d

can

be

lifted

lCl-

n-

__

..

are Ioc8t-.:I on

power

Iransastor

'-

..

.

at

boIh a<IgiM ol

"-

oin:uI

boowd

. The

righl

hind

dill"'''''

__

~

Ihn:JIqI

..

case

ol

...

,

......

"'"

just

8bow

lIIIi

""-

output

SIlld<f!t

....

Ihe

Ilift _

KftW

OJ

--....

"-<l

up

......

..

<i

...

mKtw\e

~

oroer

10 use

!he

mocl

OO

'i4'

eo

..

. voIlmel'"

laI<

a

from

...

bag

tho bl;ock wire w

oltl

• CQI

....

c.....

ill

one

end

and an insul319d mea........ p<obe at

the

(lth",

. The

COtYl9C1or

should

be

pIugqad

on

to

pilar

No. 21 which is

on

Iha main circuit

boafd

.

on

the

righl

hands

ld",

ir'l

Iir>e

with the

su

pply

sele

clor

·

Pow

","• • you mquir..

the

voUm....., tor coarse

__

""",nlS

only,

1.

1. chec

l<iong

I"

"

S<ip

ply

woIt

age

. it

is

nol

_

SIlty

10 diik:OnnllCl the

oircuiI

oj

...

frlOduIOrMw. • IJ'6MIt

.ccunocy

is

,

equ

ire<l 'emov"

br

id9

1 TB·P

On

Ito.

le

fl

I>indsoda

ol !he

~

.

RernDwIQ

....

lin!<

TB-f>

'

_'

11 !he _

~h

01

Ihe

moduIometer

cin:ult..

n.a...b-e

.

should

W'OU

....

10

......

_ on

'-

<:ircuiIs

•

Iir>I<

Ihould

be

MIld be. Cln

1&0

. The

Pi

' ••

POIa

of

the

......

.

!'IF

OJ

...

"...

......

.......,

10

...

main

earth

<i

l dIo

aold

!he

~

-..red

...

I

JespecI

10

-u,.

As

• _

W'OU

C¥I

"-'

the

inIIINI

~

-..ga

you

..

fird on

...

IirsI

piI;If

whictl

""

I ll'ey ......

_.

ew

to it. This

pilar

OJ

on Iha right

h8I'd

siOO

ol I

..

citcuiI board nalff

10

tnoa

POW

'"

t'ansistor

I'i4a1

......, T

..

voltmeter should road 10 on

the

Ioowet

scale,

i.

l.

- 10 volls DC.

Fu

•••

Tha genel'al

SUP

Ptv

fuse pm'

''''t

s

the

NAGRA

again

st

:

t

he

short-circuits which could be caused,

fo<

example, by I loose pert inside the rooo«Ier.

a ...vllrSlll of

the

supply

..

hic

ll

is

a1ws

ys

poss

ible in csse

01

acc

Ul'¥M.llaIOl"S

with non-

standard

terminals

or in CltS8 of a

....

"""sed

.lf1Ornai

SIljIply

connection. T

he

usa of a

diode in . ...;"s

witllllle

supPy m

lllM

a waste

of

8I'III'9Y

which wooId shorton !llo uSl'llul life

01 tile

be

ll

...

;"

s;

we

prefer

10

ft

a diode in

parallel willl th.. supply wlllch would cooduet

in

case

of

supply

,..

versa!

. and the fuse

would

blo

..

il

tM

co"

..

nl

"""sme

ds

"Ue

r

ously

strong,

TIle

~

a1

fuse is of

the

in-lina sokIered type;

~

is kx:ated n

ear

Sl4'pIy

salado<

•

Pow

er" 26, on

tII& riglll:, inside

IIIe

NAGAI\,

under

tile rhain

circuit

baw

d. TIle rlltOlg

01

tha fuse is 2.5 A: a

splIW

fusa is in

the

bag

of spara parts: be/ore

,aptac;ng clleck witfl a IIo\Imeler thai tile

blown

fuse

IIq

completely malllld i.e. that there is !llo

voltaga at one

01

its ands and nona at tII& otllar.

e attery

fuH

a

TIle batteries of

the

NAGRA E coosiSl of

lll

rea

groups

in series; each

llfflUP

Cf.lfI!ains

four

cells.

n-e

~s

are connected

b'f

wires roo inside

tile

NAGRA

belli

nd

tile

battary

boo. Some

8CCUmUiutors

(nol

our

s) have a thin el(lemal

inslllalion:

~ ~

is damaged th

..

may cause ..

short

-circu~

be

lO'

eM

two groups

01

cells snd

the

currant may easitv reach one hundred amps.

which is sufficient 10 msIt

the

connocting wira: its

insulation will th

an

bum

, producing aotremely

corrosive gas damaging

the

wl\ole

liIptl

recorder.

To avoid this, wa have

iI:\coopora

ted fuses in

the

ballery coolacls, on th.. rigtlt lIandside: a

spa",

I

USEI

is in

the

bag. Commerci

allu

sos may

be

usDd

(bul

ttlIlir

contacts wil

not

be

m8dol

of precious

alloys). Fuse dll1ll is as foIows : diamater 5

mm

.

lengtll 20 mm. fating 2.5 A.

13

:

l.4

, SIMPLE

FAULT

FINDING

Mach

i

ne

c

om

p"t

e

ly

de

ad

Basically lhe

pc_

supply ~ suspect. Press the

swilCh "Ban. Test" Ihe

roaod

l.. should deflllCt

N rt does

not

dllllect at aN, checlc if too baneries

are

finGd

or Ih.. ATN is conn..cIGd. Check ..Iso

w

helh

.... the switch "P

owe

r",

on

the right

handsid.., is irI lhe cooed

position

.

The

ATN may not

b&

powered; its voltage switl;h

may

001

be

in Ihe correct

posibOl'l

Or ilS

lu

oos

may

be

bl

ow

n. Before dismantling the

NAGRA.

try

it first with

anot

h",

ATN III with lh

..

balleries.

" !his is not successful, chock

ee

"",in

fuses,

(

.....

Chap""

3.3.).

If Ihe naedle

OO~

OCIS

bul lass than 10.7 V

charl{l9 tha batteries

N

the

noodle dilllecls

ab<we

10.7 V and

the

recofd.... does

no!

opera1e

.

ll1efe

~ a _

",

us

fau" which requires

9XPII11

allention.

The

electronics operi>le (ampNII.

..

. m

odu

-

1011181.'

,

h.adphon

• •)

but

th

e

motor

d

oe

s

not

'0"'18.

Switch Ihe

mach;""

1<1

fast ,ewind and turn

the

IIII! .

..

1by hand. II th& motor stsrts rt means

lha

t

its colloctor is faulty. It must be repaired but. in

tI>e

meanlim• • it may still continue

1<1

work. n a

.

e,.,,;ca

9tlg;naer is

not

available. cpan the

••

cord

e.

(see

Chap

le

r 3

.3

.).

remo

v.. I

he

sc~

·can

shielding

the

mm

or

and

lry to

cklan

Iha collector with a tis......

s<lake

d

On

alcohol.

Take care 001 to distort or damage th& brushes;

!hey are made

01

p"lICious alloy and are very

e

.pens~

.

The motor" rotales

at

full

s

peQCI

On

playb

a

ck

oron reoordlng.

It may be a

fau

lt

due

1<1

t

he

speed

sta

bil

izar or

tI>e

lachometric head.

Ths

head is near

tt1e

motor

insida

Ihe

bGU

which

goes

10

tt1

e nghl ,eel. Check

that

i1s

wires are

001

broken or that

rt

is net

misplacfld.

The

normal gap betwaen

ee

head and

the tac

!l

c

IJ

""

tric whe&!

~

0.1 mm. i.e. the ticknass

01

e stiff piec(l of

JI'I

P"'

.

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Nagra E User manual

Nagra E User manual

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