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HF20
CONSTRUCTION BOOK ADDENDA
Page 9
Left
hand column,
Left
hand column.
Left
hand column.
Step
2:
Change
value
of
C5
to
2700
mmf ±10%.
Step
5:
Change
value
of
C3
to
. 1
mfd
400 V.
Step
8:
For
"a piece
of bare wire",
substitute
"a
47KQ,
1/2W,
10%
resistor
(from
R10"6
(S) to
ground
lug
"D"
(S).
Step
12:
Change
value
of
C2
to
2200 mmf,
10%.
Right
hand column.
Step
3:
Change
value
of
R18
to
1.5KO, 1/2W, 10%.
Right
hand column.
Step
4:
Change
value
of
C9
to
850mmf,
±10%.
Left
hand column.
Please correct
Fig.
5
on
page
8
in
accordance with
the
above
listed
changes.
Page
1.
(last
step
in
Output
Stage
wiring):
Resistor
R48
is
3500,
10W,
not
3500, 7W.
Please also
make
the
following
changes
in
your
instruction
book
(white pages).
Parts
list
of opposite schematic: the
third
item
in
the
second column
reads:
14700
R48
res.,
3500, 7W, 10%
1
It
should read:
14302
R48
res.,
3500, 10W,10%
1
The
parts
list
under
the
schematic
reads:
R48
res.,
3500
,
7W, 10%
It
should read:
R48
res.
,350
0,
10W,
10%
The Replacement
Parts
List
Stk.*
10400
should
read:
10400
R15
res.,
10KO,
1/2W,
10%
(B-B"0)
1
ADD
to
the
Parts
List:
11500 R32
res.,
10KO,
1/2W,
5% CD
1
Also
make
the
change on
the parts
list
under
the
schematic.
I.E.
1091
Electronic Instrument
Co.,
Inc.,
33"00
Northern
Blvd.,
Long
Island
City
1,
New
York
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