Model
333A/33rlA Appendix
C
Manual Backdating Changes Model 333A/334A
Page
3
CHANGE
67
A2C29
was
390
pF
in
some
earlier
inetrumente.
Do not
change
A2C29
to
the
value
shown
in
Table 6-1 unless
a
frequency response problem
is
encountered
on
the
300
pV
range.
Change A3R3
to
12
khl.
It
Awl
is
changed
it
may
be
necessary
to
change the
value
of
A3R3
to
compensate
far
transistor
gain.
Delete
FU2
and
add
AlR1, connected
between
pine
10
and
11
on
Al. AlRl
L
33
ka
CHANGE
#8
CHANGE
#9
CHANGE #lo
Table
6-1:
part
#
0687-3331.
Change
the
part
#
of
Cable W1
to
8120-0078.
Change
the
part
#
of
54
to
1251-1009.
Change
the
part
#
of
the 333A
rear
panel
to 00333-00202 and
change
the
part
#
d
the
334
rear
panel
to
00334-00202.
Change
AlR13
part
#
to
2100-1434.
Change
A3R20
to
part
#
2100-1738.
Change
A3R39
to
part
#
2100-0151.
Page
6-4:
The
parts
in
thie
change
are
not
directly
interchangeable
unless
all
parts
are
changed.
CHANGE
111
change
A2R3
to
part
#
21006094.
The
resistors
in
this
change
are
not directly interchangeable
with
tbe
ones
listed
in
Table 6-1.
CHANGE #12
Figure
7-3:
Delete
the 47
ohm
resistors A3R35 and A3R36 in
series
with the
f
25 volt lines.
Replace the resistors with
a
direct connection.
Change the value
of A3R16 to
3300
ohms
and delete A3R34.
Change
the
circuit in the vicinity of A3R37
as
shown
below:
Table 6-1:
Change A3R16 to R: var
3.3
k51
f
10
8
1/8
W,
-hp-
part
no. 2100-1435.
Change A3R37 to
R
var
100
kS1
f
30
%
1/8
W,
-hp-
part
no. 2100-0362.
Delete A3R34, A3R35, and A3R36.
CHANGE #13
Page
6-3:
Change
@
to 5040-0642.
Change
8
to 5060-0739.
Change to 5060-0766.
Change
8
to
5000-0732.
Change
to
5000-0733.
Page
6-4:
to 5060-0751.
to
00334-00201 and 00333-00201.
CHANGE
#l4
Page
5-8,
Table 5-5:
Page
6-9:
The
voltage
limits and regulation values
for
A3TP2
are
changed to
-
20.2
V
f
0.3
V.
Change A3Q4
to
part
No.
1855-0006.
Change
A3R37
to
Part
No.
06834735, 47
kS2.
c-3
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