Heathkit HR-10B - Transformer Wiring

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Page 16
( ) R33.
Referring to Detail 1P and Pictorial
1, mount the front panel to the front apron
with the AF GAIN control (#19-72) at lo-
cation FB on the .front apron. Use a control
solder lug on the ·control bushing and a
control flat washer and control nut on the
front panel side. Do not tighten securely
yet,
Detail1P
( )
( )
(
)
(
R5, Similarly, mount the RF GAIN control
(#10-131) at location FD. Use a large spacer, -
two
control lockwashers, a control flat
washer, and a control nut, SeeDetail1Q,Do
not tighten securely yet,
CONTROL FLAT WASHER
Detail 1Q
Mount the phone jack on the front apron at
location FA. Use a control lockwasher,
control flat washer, and a control nut.
Do
not tighten securely yet.
Mount a 3/8" x 3/8" brass bushing at loca-
tion F J on the front apron. Pass this bush-
ing through from the front panel side. Use
a
control lockwasher, control flat washer,
and a control nut. Now tighten all control
nuts.·
Mount a 6-32
speednut in the cutout at each
corner of the chassis. Be sure that the flat
--- ·- - ---- -
side of each speednut faces outward as shown
in
Pictorial 1.
TRANSFORMER WIRING
Refer to Pictorial 2 for the follo'('ing steps.
Connect the audio output transformer leads as
follows:
LEAD COLOR
(
Black
( Blue
Red
Green
) White
CONNECT
TO
solder lug E (NS).
lug 9 of tube
socket V6
(NS).
lug 3 of electrolytic ca-
pacitor H (NS).
lug 2 of phone
jack FA
(S-1),
Lug 3 of phone
jack FA
(NS).
Connect
the power transformer leads as follows:
(
(
(
LEAD COLOR
Short red
Long red
Short green
Long green
Red-yellow
CONNECT TO
lug 1 of tube socket V7
(S-1).
lug 6 of tube
socket V7
(S-1).
lug 3 of tube
socket V7
(NS).
lug 4 of electrolytic ca-
pacitor H- (NS). ·
lug 4 of electrolytic ca-
pacitor H (S-2). Apply
enough
solder and heat
to securely solder the
mounting tab to the ca-
pacitor mounting wafer.
Two sets of line voltage wiring instructions are
given below, one ·for 120 VAC line voltage and the
other for 240 V .4-c line voltage, In the U: .s.A.,
120 VAC is most often used, while in foreign
countries 240 V AC is more common, USE ONLY
THE INSTRUCTIONS THAT AGREE WITH THE
LINE VOLTAGE IN
YOUR AREA.
120 VAC Wiring
( ) Twist together loosely the black and black-
green leads, Then connect both to lug 4 of
control FB (S-2).
( )
Twist together loosely the black-red and
black-yellow leads, Then connect both to
lug 2 of terminal strip BC (NS),
Now proceed to Harness Wiring,