Nagra III - Modification Notes; Monitoring Switch Modification; Microphone Preamplifier Upgrade

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NAGRA

III

MODIFICA

TION

NOTE

BEFORE-AFTER

MONITORING

SWITCH

This

Nagra

is

equiped

with

a

push

button

which

permits

the

selection

of

the

sound

source

to

the

monitoring

earphones

during

recording.

One

can

select

to

monitor

the

signal

already

recorded,

or

the

signal

before

it

is

recorded.

By

pressing

the

BA

switch

(see

photo

below),

the

signal

before

recording

is

selected.

When

the

button

is

not

pressed,

one

has

at

the

monitoring

sockets,

the

signal

as

described

in

article

No.

13

of

the

description

of

controls.

MODIFICATION

NOTE

-

MICROPHONE

PREAMPLIFIER

This

Nagra

is

equiped

with

a

new

type

of

microphone

preamplifier

designated

LN.

This

preamplifier

permits

the

selection

of

input

impedance

between

50

ohms

and

200

ohms.

All

that

is

necessary

to

do

in

order

to

change

from

one

impedance

to

the

other,

is

to

rewire

internally

the

connections

on

the

input

transformer.

For

wiring

information,

please

refer

to

the

mike

preamplifier

section

of

the

Nagra

wiring

diagram

included

in

the

instruction

manual

dated

May

1st,

1963.

KUDELSKI

6,

ch.

de .I'Etang, Paudex - Lausanne, Switzerland

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