Page 1-76
C
E
IEESEE
STEP-BY-STEP A S S E M B L Y
V F O FILTER CIRCUIT BOARD
C U I T H E C A B L E A C C O R D I N G TO T H E D I M E N S I O N S B E L O W .
P R E P A R E E A C H E N D AS S H O W N .
PICTORIAL 6-1
100
{2
(brown-black
wire. Then
e end of this wire
in
hole C
r the wire to the foil, The
wire will be
.01 F disc.
Lay the circuit board aside. It will
be used later,
Squeeze
a
little of the cement (saved
from the VFO steps)
into the
centers of the three toroid coils to
affix them to the circuit board.
Refer to Detail
61A
and prepare a
6
length of shielded cable. NOTE:
DO NOT use G-58A/U.
Solder the leads to the foit and cut
off the excess lead lengths.
At end A of the cable, connect the
center conductor to
A (S-1)
and the
shield to
B (S-1).
End
B
will
be
connected later.
( ) 0 1 2 5 1 :
2N5770
transistor
(#417-293). First line up the flat on
the transistor with the outline of the
flat on the circuit board. Then insert
the
transistor
leads
into
their
corresponding holes indicated by E,
B,
and
C.
Solder the leads to the foil
and cut off the excess lead lengths
"ri""
FLAT
Detail 6-1A
1 - 3 / 4 "
R E D
1 - 3 / 4 "
G R Y
h
200 pf disc.
R1252: 22
.2
(red-red-orange)
L1251: Toroid coil
(#40-1869).
L1252: Toroid coil (#40-1872)
a
o o -
tu
brown),
C1253: 1000 pf mica.
C1254: 1000 pF mica.
Solder the leads to the
foil
and cut
off the excess lead lengths.
L1253: Toroid coil (#40.-1869)
(
Prepare a 1-3/4" gray wire, Then
insert one end of this wire
in
hole D
and solder the wire to the
foil.
The
free
end
of
this wire will be
connected later.
NOTE: To prepare a length of wire, cut
it
to the indicated length and remove 1/4"
f insulation from each end
Position the VFO/filter circuit board
(#85-1930-1)
as
shown and complete the
following steps.
Summary of Contents for Heathkit SB-104A
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