6
of 8
MANUAL CHANGES
Model 339A
CHANGE NO. 2S
(effective on serial
nambers 202SA0243S to
2025A0278B).
Pag* 8-7,
Tabla
1-3.
Delete
all
information
on A3C202, A3C203,
A3C204,
A3CR200,
and
A3CR201.
Pag*
8-1518-16. Figara
8-14.
Delete
schematic
symbols, values,
and
designators for
C202,
C203,
C204,
CR200, an<J
CR201.
(applies to al)
instrumental
(affective
oa serial
namber 2025A02786
and above)
Pago
8-7, Table
8-3.
Add
the
following
reference designators, part
numbers, and values:
A3C204
0160-2201
51
pF
A3CR200
1901-0040 Diode
A3CR201
1901-0040 Diode
Page
8-1518-16, Figara
8-14. Replace
C204,
CR200 and CR201
where they were
in the
schematic
originally.
Tl^^nd result
is
to
delete
C202
and
C203.
ClflWGE NO. 28
(applies to
all instruments!.
Pago
6-13.
Tablo
8-3.
Change
the
description of part number
00339-04004 from ’KNOB,
TENS'
to
"
KNOB. UNITS'
.
Change
the description
of part
number 00339-04005
from
'KNOB,
UNITS"
to 'KNOB,
TENS".
CHANGE
NO.
27
(applies to all instnimsnts)
(affective
oa serial
namber
1730A02716
and above).
Page
6-12, Table
8-3.
Just above the
listing of W4
add
part number
00339-61915.
'SWITCH ASSY.'
and
move the reference
designator
W4 up
to the new
listing.
Just
above the
listing of W5
add
parr number
00339-61916.
"SWITCH ASSY." and
move
the
reference
designator W5 up
to the
new listing.
Page 8-13, Table
8-3.
Just
above the listing
of W10
add
part number
00339-61917.
"SWITCH ASSY." and
move the reference
designator
W10
up
to
the new
l
:
sting.
CHANGE NO. 28
(effective oa serial
naeibers 2025A02646
to
2025A03718).
Page
6-4,
Table
6-3. Change the
part number and value of the
reference
designators below
as
listed:
2C4
from 0160-0341 640pF to
01 60-2940 470pF
A2C5
from 0160
2201
5
1
pF to 01
40-01
92
68pF
Page
8-1918-20. Figure
8-18.
Change
the value of
C4
from 640pF to
470pF and
that of
C5
from
5lpF
to
68pF
(applies to all instruments!
(affective oe
serial
number
2025A03716 and
above)
Page
6-4.
Table
6-3.
Change
the
part
number and value of the
reference designators below as listed:
A2C4
01 60
2940
470pF to 0140-0234 500pF
A2C5
0140-0192 68pF to 0160-3083
62pF
Pago
8-1918-20.
Figure
8-16. Change
the
value
of
C4
from 470pF to
500pF and that of
C5
from 68pF
to
62pF
This change improves,
1
(gain above
100kHz,
and
2)80kHz
filter
response
Changing
A2R6 is part
of this
update. See
change
no.
29.
lapplios
to all instruments)
laffactiva on
sariai number
2025A02646
and
ahova)
Pago
8-4, Tabla
6-3. Change the
part
number
and
value
of A2C1
5
from
0160-2201 5
1
pF to
01
60-2204 lOOpF.
Pago
8-19)8-20, Figara
8-16. Change
the
value of Cl
5
from
51pF
to
lOOpF.
Pago
8-13. Tablo
8-3. Change
the
part
numbers
and
descriptions
of
the
following items:
from 21
10-0465 to
21
10-0564
FUSEHOLDER
from
2110-0467
to
21
10-0565 CAP,
FUSEHOLDER
from
21
10-0470
to
21
10-0569
NUT,
FUSEHOLDER
CHANGE NO. 29
(applies
to all
instnimsnts)
(affective oa
sariai
number 2025A03718
and abova).
Page
6-13, Tabla
6-3. Change
the
part number
of W7
from
00339-61607 to
00339-61612
and
that
of W7S10
from
3101-1656 to
3101-2216.
The description
for W7S10
should
read
"
SWITCH POWER"
.
Below that
listing
delete
all
information
on
part number
5040-5932
and add
8120-0593.
"CABLE
SHIELD".
Pago
8-14, Tabla
8-3. Change
the
part
number
of MP1
from
00339-00201 to
00339-00211
and
that
of MP2
from
00339-00202
to 00339
0021
2.
Pago
6-5,
Table
8-3. Change
the
part
number
and value
for
A2R6
from
0698-4445,
5.76kl)
to
0698-3382.
5.49kS2.
Page
8-1918-20. Figure
8-16. Change
the
value
of R6 from
5.76kfl to
5
49k£2.
This
is part of
the change to
improve, 1
1gain
above 1
00kHz, and
2!
80kHz
filter response. See
change
no.
28.
CHANGE NO. 30
lapplios
to all
instruments)
laffactiva on sariai
number 2025A03786
and
above).
Pago
6-11, Table
8-3. Change the
part
number
3100 3423
to
3100-1663.
When °N 3 1
00-
3423
went from
hill-and-valley to
a
unidex
index-
er
it was necessary
to change
part
numbers.
The new and
old PNs
are
completely
interchangeable.
CHANGE NO. 31
(applies
to
all
instruments!
(effective
oe
serial
nember 2025A02716
and abova).
Page
6-6. Table
6-3. Change the
part
number and
value of A3C1 10
from
0140-0192,
68pF to
01 40
01
90.
39pF
Page
6-9,
Table
6-3.
Add
cable assy
00339-6161
3
at
the end
of the
listings
for the
A3
board.
Page
8-1318-14,
Figere
8-13. Change
the
value
of
Cl 10
from
68oF to
39pF.
These changes
improve
range-to-range
accuracy.
Page
6-14, Table
6-3.
Add
part
number
5041-3124, PUSH
ROD
CHANGE NO. 32
lapplies
to
all instruments!.
Page
6-7. Table
6-3. Change
the
part number
of A3Q100
from
1
855-0360 to
1855-0458.
This change
is being made
because
PN
1855-0360 is
being
discontinued by
the
vendor
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