Install these remaining parts
common
to
all bands:
0 0 45. C6,
.1
pF
disc capacitor (marked 104)
0 0 46. C7, also
.1
pF
0 0 47. C8, also
.1
pF
0 0 48. R4, 1
OOK
(brown-black-yellow)
0 0 49. R5, 1
megohm
(brown-blijck-green)
0 0 50. R23, also 1 megohm
0 0 51. C25, 3 pF
This completes installation
of
parts
common
to
all ba.nds.
If
there
is
no question in
your
mind
about
which
band you
wish
to
set
up, final parts installation is
only
a
matter
of
selecting
the
correct
values for C1-C5, L1-L3, and installing
them
in
the
normal
way.
If you plan
to
"tinker"·
with
several bands before making a final
choice, you can make desoldering a
bit
easier on yourself
by
leaving
an
extra 1
/8"
or
so
of
lead
length
between
capacitors and
the board, and soldering
only
one
of
the
two
legs on the··coil
shields.
If
you do change parts, be gentle so
as
not
to
damage
the copper traces
of
the
board,
or
the
parts themselves.
T-KIT 1
056
Direct-Conversion Receiver
GUIDE
TO FREQUENCY-DETERMINING PARTS
C1
C2 C3
C4
C5
l1
l2
L3
160
.001
.0047
180 180
.01
8.0pH
8.0pH
47pH
80
180
680
150
150
.01
.a.o
8.0
8.2
40
91
470
150 150
68
5.8
5.8
jumper
30
91
470
100 100
15
2.8
2.8
jumper
20
47
220
47
47
15
2.8
2.8
jumper
17
56
270
22 22
10
1.3
2.8
jumper.
15
47
270
47
47
10
1.3
1.3
.
i_umper
12
33
180
33 33
10
1.3 1.3
jumper
10
27
150
22 22
10
1.3
1.3
jumper
Complete
identification
data
for
the
1
056-LC
Band Change Parts
Kit
is
provided in
the
Kit Parts List
on
page 9. Before soldering
the parts in Steps
52
through
59,
write
the
correct value in the
blanks provided on the
following
page.
1056-
16
I
Install the
following
parts
for
the
Meter
Band:
0 0 52. C1, value
0
0·53.
C2,
value--
0 0 54. C3, value
--
0 0 55. C4,
value--
0 0
56.
C5,
value==
0 0 57. L1, value marking
0 0
58.
L2, value
--
marking
--
0 0
59.
L3,
value==::
color
code
_______
_
• A
wire
jumper
MUST
be
installed
at
L3
if
a
coil
is
not
required.
First
Connections
The
minimum
connections needed
to
test
the
receiver are wires
for
DC
power,
an antenna
or
random
wire,
plus headphones or
speaker. The normal color code
for
DC
power
is red
for
positive
and black
for
negative. We recommend using stranded hookup
wire
rather
than
the
solid
type:
solid wire is prone
to
breaking
easily. Before connecting 1
2VDC,
it
is
worth
the
effort
to
go
back over
your
work,
checking
for:
0 Quality
of
solder
points
0 Completeness
of
soldering
work
(it's
easy
to
miss one)
0 All excess
wire
leads
trimmed
·
0 No
wire
scraps lodged
between
solder
points
Initial
Tests,
Adjustments
Before applying DC voltage, place the finished and double-
checked board on a clean, non-metallic
work
surface. If you
are
ready
to
do so, oscillator
alignment
will. go more
smoothly
if
the
board is already
mounted
to
its
intended chassis or panel, or
clampedin
a small vise. This is true especially
for
frequencies
above
14
MHz,
which
can be
affected
by
tiny
capacitance
changes
of
the
board being
moved
around on another surface.
Set
the controls
as
follows:
RF
Gain-
maximum
(clockwise);
Tuning, Bandspread,
Bandpass-
mid scale; AF
Gain-
as
desired.
Adjustment
of
coils L1 and L2
must
be made
with
a non-metallic
alignment
tool.
If
necessary,
such
a
tool
can be made easily.
from
a plastic
shaft,
wood
dowel,
etc.
1056-17
