Eico HF-20 - Page 28

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ADDENDA
MODEL
HF
20
To
Improve
the
performance
possible
from
the
HF20,
certain
parts
values
have
been
changed
from
the
values
given in
your
book.
A
part
has
been
added
also for
this
reason.
Please
correct
your
book
as
follows
before
beginning
the
construction.
REPLACEMENT
PARTS
LIST
&
SYMBOL
IDENTIFICATION
LIST
BELOW
SCHEMATIC
DIAGRAM
OLD
NEW
SYM.
STOCK#
DESCRIPTION
STOCK#
DESCRIPTION
C2
22506
cap.,
disc.,
.Q2mfd,20%
22507
cap.
,
disc.
,2200
mmf,
±10%
C3
20042
cap.,
disc.,
.05mfd
20039
cap.,
.lmfd,
400V
*C5
22508
cap.
,
3300
mmf
22518
cap.,
2700mmf,
±10%
C9
2251
1
cap.,
disc.
,5000 mmf,
20%
22514
cap., disc.,
850 mmf, ±10%
R18
10430
res.,
4.7KQ, 1/2W,
10%
10442
res.
,
1
.5KQ
,
1/2W,
10%(Br,
G,R)
ADD
**R49
new
component
10428
res.
,47KQ
,
1/2W,
1
0%(Y,
V,
O)
*
In
row
beginning
22508,
strike
out
C5 and
change
quantity
from
2 to
1 .
Add
new C5 as a separate
line.
**
R49
should
be
connected
between
the
tap
on pot
RIO and
ground
Instead
of
the
{umper previously
used.
Connect
schematic
diagram
accordingly.
I.E.
1093
t
9
Electronic
Instrument
Co.
,
Inc.
,