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Heathkit SG-6 User Manual

Heathkit SG-6
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WIRING
PROCEDURE
9.
Wire
in
the
power
transformer
(V9S)
as
shown
in
pictorial
1
and
as
follows:
twist
the
two
black
leads
together,
cut
them
to
proper
length,
and
fasten
them
to
the
two
outside
lugs
of
the
three
lug
terminal
strip
(NS).
Fasten
one
yellow
lead
to
solder
lug
1 (NS)
and
the
other
yel-
low
lead
to
pin
4
of
tube
socket
A (NS). One
red
lead
goes
to
solder
lug
1 (NS)
and
the
other
red
lead
connects
to
the
bottom
lug
{lug
furthest
from
the
red
edged
insulator
piece)
of
the
selenium
rectifier
{S).
Wire
from
pin
4 of
socket
A
(S)
to
pin
4 of
socket
B (NS).
Note
that
this
wire
follows
along,
and
is
close
to,
the
bend
of
the
chassis.
Wire
from
pin
4
of
socket
B
{S)
to
the
pilot
light
"HOT"
solder
lug
(S)
(see
Fig.
6)
passing
the
wire
through
the
nearby
rubber
grommet.
Ground
the
pilot
light's
"GROUND"
solder
lug
to
the
pilot
light
frame
(S).
Wire
from
pin
3 of
socket
B (NS)
to
solder
lug
3 (NS).
Wire
from
pin
3 of
socket
A (NS)
to
solder
lug
2 (NS).
10.
To
the
left
hand
lug
of
the
3
lug
terminal
strip,
fasten
one
lead
of
a .001
MFD
condenser
(SG46) (NS)
and
this
condenser's
other
lead
connects
to
solder
lug
5 {NS).
Note
that
lead
near
"outside
foil"
or
black
ring
marking
on
body
of
condenser
is
the
lead
which
goes
to
the
solder
lug
(ground).
Hereafter,
whenever
condensers
are
grounded,
have
the
outside
foil
lead
as
the
grounded
lead.
Connect
the
other
.001
MFD
condenser
to
the
middle
lug
of
the
3
lug
terminal
strip
(NS)
and
its
outside
foil
lead
to
solder
lug
5 (S).
11. Note
that
the
"RF
output
-
AC
off"
control
has
two
solder
lugs
protruding
from
the
back
of
it.
Twist
two
pieces
of
wire
together,
and
wire
from
control's
back
lugs,
(lugs
Sl
and
S2,
Fig.
5)
(S)
to
the
middle
{NS)
and
right
hand
solder
lugs
(S)
of
the
3
lug
terminal
strip.
Refer
to
pic-
torial
1.
12.
Wire
from
the
upper
lug
(the
lug
nearest
the
red
edge
insulator
piece)
of
the
selenium
rec-
tifier
(S)
to
the
right
hand
lug
on
the
two
lug
terminal
strip
(NS).
To
this
right
hand
lug
also
connect
one
lead
(on
the
side
marked
positive
or
with
a+++
marking)
of
the
dual
20
MFD
con-
denser
(K13) (NS).
The
single
lead
at
the
other
end
of
the
condenser
goes
to
solder
lug4
(S).
The
other
positive
lead
goes
to
the
left
hand
lug
of
the
two
lug
terminal
strip
(NS).
Wire
the
2700
resistor
(KlO)
between
the
right
hand
lug
of
the
2
lug
terminal
strip
(S)
and
the
left
hand
lug
(NS).
To
this
left
hand
lug
also
connect
one
lead
of
the
5600
resistor
(Gl2)
(S)
and
the
resistor's
other
lead
to
pin
5
of
socket
B (NS).
Wire
from
pin
5 of
socket
B (S)
to
pin
1 of
socket
A (S).
This
wire
follows
along
the
bend
of
the
chassis.
13.
SOCKET
B:
Wire
to
socket
B
as
follows:
to
pin
1
connect
one
lead
of
a .01
condenser
(T13)
{S)
and
fasten
the
outside
foil
lead
to
solder
lug
3 (S).
Fasten
to
pin
6 a
lead
of
the
27K
re-
sistor
(FM36) (NS)
and
connect'
the
other
lead
of
this
resistor
to
pin
3 (S).
14.
SOCKET
A:
Socket
A
wiring
is
as
follows:
to
pin
3
connect
one
leadofa330resistor
(AR25)
(NS)
and
the
resistor's
other
lead
to
pin
7 (S).
To
pin
3
connect
one
lOOK
resistor
lead
(012)
(S)
and
the
other
lead
goes
to
pin
6 (NS).
Wire
from
pin
5
(S)
to
the
"EXT
-
INT"
modulation
switch
contact
M12(S).
Connect
one
lead
of a .05
condenser
(AR2S}
to
pin
6 (S)
and
the
out-
side
foil
lead
of
this
condenser
fastens
to
"EXT
- INT."
modulation
switch
contact
M2
{S).
15. MODULATION SWITCH:
Considering
now
the
wiring
of
the
modulation
switch
(see
Fig.
5
showing
numbering
of
switch
contacts)
wire
as
follows:
connect
a 390K (SG54)
resistor
be-
tween
lugs
MS
(NS)
and
MlO
(S)
and
be
certain
that
the
resistor
leads
are
passed
through
the
sold
.
er
lug
holes
in
direction
as
shown
in
pictorial,
otherwise
difficulty
might
be
encountered
when
trying
to
slip
the
chassis
into
the
cabinet.
To
switch
lug
Mll
fasten
a .1
condenser
{slip
spaghetti
over
the
condenser
lead)
(049)
(NS)
and
the
condenser's
outside
foil
lead
goes
to
solder
lug 1 (NS).
To
lug
M3
connect
one
lead
of a .02
condenser
(use
spaghetti)
(025)
(NS)
and
fasten
the
outside
foil
iead
to
solder
lug
1 (S).
Twist
the
leads
of
the
AF
choke
and
con-
nect
one
of
them
to
contact
Mll
(S)
and
the
other
one
to
contact
lug
M3
(S).
Connect
one
lead
of a .01
condenser
(T13)
to
contact
lug
Ml
(S)
and
the
conden'ser's
other
lead
to
solder
lug
AF2
(NS)
of
AF
"IN-OUT"
control.
From
contact
lug
MS
connect
a
lead
of
a .01
condenser
(S)
and
the
outside
foil
lead
goes
to
lug
AFl
(NS).
16.
AF
IN-OUT
CONTROL:
To
lug
AF3
fasten
a
wire
(S)
and
connect
it
to
solder
lug
2 (S).
Con-
nect
a
piece
of
wire
to
AF2
(S)
pass
it
through
the
nearby
grommet,
and
fasten
to
the
AF
"OUT"
phone
jack
"HOT"
lug
(Fig.
7).
To
AFl
connect
a
piece
of
wire
(S),
pass
it
through
the
nearest
grommet,
and
fasten
it
to
the
AF
"IN" phone
jack
"HOT"
lug
(S).
Page
5

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Heathkit SG-6 Specifications

General IconGeneral
BrandHeathkit
ModelSG-6
CategoryMeasuring Instruments
LanguageEnglish

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