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MANUAL
CHANGES
Page
5
of
8
el
339A
Page
8-19/8-20, Figaro 8-18.
Add
R50, R51, C50. and
C51
to
the
schematic
as
shown
in
Figure
4.
This
change
is
to
decouple
power
supplies
on
A2U1
to
reduce
the
affect
of internal oscillation
on
the
80kHz
filter
response.
The
values
of
C
1
1
4,
C
1
1
5
and
C
1
1
6
are
changed
to
compensate
for
the
stray
capacitance
in
the
new 00339-26513
printed
circuit
board. (See
change
no.
1
3
for
information
on
Cl
1
4).
(affective
oa a*
serial
nemiier
202SA022Z6
to
2025A02438)
Page
8-9,
Table
8-3.
Change
the part
number
of
A3U200
from
1
826-0109
to
1
826-0413.
«
(affective
from
sorial
nombor
2025A02228
to
2025A02788)
_
i
6-7,
Table
6-3.
Change
the part
number
and
value
of
A3C205
from
0160-2264. 20pF
to
0160-2200. 43pF
Page
8-1518-18, Figaro 8-14.
Change
the
value
of
C205
from
20pF
to
43pF
(effective
on
sorial
number
202SA02438
to
2025A02786I
Pago
6-9.
Table
6-3.
Change
the
part
number
for
A3U200
from
1826-0413
to
1826-0081.
(applies to
all
instruments)
(effective
on
serial
number
2025A02786
and
above!
Pago
6-9,
Table
6-3.
Change
the
part-
number
for
A3U200
from
1826-0081
to
1826-0413.
Page
6-7,
Table
6-3.
Change
the part
number
and
value
of
A3C205
from
0160
2200,
43pF
to
0160-2198, 20pF
Page
8-1518-18, Figure 8-14.
Change
the value
of
C205
from
43pF
to
20pF.
These changes
reduce
noise
in
the
Analyzer
Mode
due
to
the
LM-31
8
Op
Amp.
Meter
readings
at
1kHz
with
a
clean source
are
typically
-94dB. With
the
HA
2605
the
meter
typically
reads
-96dB.
CHANGE
NO.
21
(applies to
all
iastrumants)
(affective
oa
sorial
number
2022A02156
and
abovol.
Pago
8-14,
Table
8-3.
Change
the
part
numbers
for
the following
miscellaneous
parts:
MP9
from
00339-00603
to
00339-00613
MP1
0
from
00339-00601
to
00339-0061
1
MP1
1
from
00339-00602
to
00339-00612
MP1
4
from
00339-00604
to
00339-00614
MP1
5
from
00339-00605
to
00339-00615
(effactiva
on
SN
1730A02158
and
abovol
Pago
8-13,
Table
6-3.
Add
part
number
00339-23201,
Qty
5.
Coupler,
Shaft.
CHANGE
NO.
22
(applies to
ail
instruments!
(effactiva
oa
serial
number
2025A02296
and
abovol.
Pago
6-4,
Table
6-3.
Change
the
part
number
of
A1U2
from
1826-0315
to
1826-0557.
Page
6-6.
Table
8-3.
Change
the
part
number
of
A2U8
from
1826-0315
to
1826-0557.
Page
6-7,
Table
6-3.
Delete
all
information
on
A3J2.
Pago
6-10,
Table
6-3.
Change
the part
number
of
A4U3, A4U5,
and
A4U6
from
1826-0315
to
1826-0557
(effoctivs
on
serial
numbers
1730A02156
to
2025A03716!
Page
8-6,
Table
6-3.
Change
the
part
number
for
A2U1
from
1
826-031
5
to
1
826-0557.
The change
of 1C part
numbers
is
to a
ceramic
part to
prevent
held
failures
due
to
phosphorus
contamination.
lapplias
to
all
instruments)
(effoctivs
on
Serial
Numbar 2025A03716
and
abovol
Pago
6-6,
Table
8-3.
Change
the
part
number
of
A2U1
from
1826-0557
to
1826-0323.
CHANGE
NO. 23
(applies to
all
instruments)
leffective
on
serial
number
2025A02366
and
above).
Pago
6-11.
Table
6-3.
Add
part
number
00339-00616,
"SHIELD,
PCB"
.
CHANGE
NO.
24
(applies to
all
instruments)
loffoctivs
on
serial
number
1730A02436
and
above).
Page
6-7,
Table
8-3.
Change
the part
number
and
value
for
A3F1 00
from 21 10-001
1,
062A
to
21
10-0236,
1A.
Page
8-13/8-14, Figure 8-13.
Change
the
value
of F
1
00
from
062A
to
.
.1
A.
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