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H
52005-
301D
(a)
Components
indicated by
a
t
have
their values selected during test
to
achieve
particular performance limits
.
(b)
Owing to supply
difficulties, components
of
differing
value or type
may be
substituted provided the overall
performance of the
instrument
is maintained.
(c)
As part
of
a
policy of continuous development, components
may be
changed
in
value
or type to obtain detail improvements in
performance.
5.
When there is a difference between
the component
fitted and the one
listed,
a lways
use
as a
replacement the same
type
and value as found in
the instrument.
ORDERING
6.
When
ordering
re-placements, address the order to our Service Division (address
on rear cover)
or
neares
t
agent
and specify
the following
for each component
required :
(1)
Type
*
and
seria
l number of instrument
(2)
Complete circuit reference
(3)
Description
(4)
Marconi
Instruments
code
no.
*As given on
the
serial
number
label
at
the rear
of the
ins
trument;
if
this
is
super
seded by a
model
number
la
b
e
l,
quote the model
number
instead
of
the type number
.
Chap
.
6
P
age 2
Nov
.
79
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