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5.5
ON OP AMPS
The Model 562 Feedback Suppressor makes extensive use
of
integrated circuit operational amplifiers
(IC
op amps).
During the
last several years, much research and development
work
has been
done by the semi-conductor manufacturers
to
improve their products,
and
more
is
anticipated.
We expect that better op amps
at
lower
cost will be available
as
this development work continues.
At the
time
of the
design
of the
Model
562, we
anticipated this
and
have
made every effort
to
design
the
circuit
so
that
as
improved parts
become available they may
be
incorporated into
the
Model
562
with
little,
if
any,
modification.
We also realize that occasionally an
IC
will fail.
For this reason, the table below lists
a
number
of
different operational amplifiers which will function
as
direct,
pin-for-pin replacements
for the op amps
in
the 562.
For one
reason or another, they may not function
as
well
as the op
amps
originally supplied with
this unit, but for
emergency repairs,
if
the
original types are not available, these will get the instrument
back into service.
MODEL
or
TYPE
MANUFACTURER
ORIGINAL
.
•
.
HA 4741-5
TL 084
.
HARRIS
TEXAS INSTRUMENTS
REPLACEMENTS
.
.
HA 4741-5
TL 074
.
RC 4156
.
LM 347
.
RAYTHEON
TEXAS INSTRUMENTS
RAYTHEON
NATIONAL SEMICONDUCTOR
All of the above "replacement" op amps should
be
considered
interim replacements until
the
correct "original" device can
be
obtained
and
substituted.
-
19
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