Preliminary Wiring-Band Switch - Heathkit SB-401 Assembly Manual

( ) Connect the blue wire from lug 1 of coil CX
to BS4-Fll (8-1).
( ) Connect a 2-1/4" green wire from lug 21
of terminal board #1 (8-2) to BS3-R2 (8-1).
( ) Connect the red wire from terminal pin
F on the mixer-bandpass circuit board to
BS3-F9 (8-1).
NOTE: Wafers 1 and 2 of the Band switch have
12 possible lug locations and wafers 3, 4, and 5,
have 22 possible lug locations. Tomake it easier
to locate individual lugs, each lug location (hole)
will be counted, although every hole does not
have a lug. See the inset drawings on Pictorial
4-7.
( ) Connect the white wire from lug 3 of tube
socket V8 to BS2-R4 rs.i),
( ) Remove the switch shaft from the Band
switch by sliding it out through hole BU in
the rear of the chassis.
( ) Connect a 1-1/4" bare wire from lug 2 of
crystal socket Y7 (8-1) to BSI-F1 (8-1).
( ) Secure the final shield to the chassis with
a #6 x 3/8" sheet metal screw.
( ) Connect a 3/4" bare wire from lug 2 of
crystal socket Y6 (8-1) to BS1-F2 (8-1).
( ) Secure the front portion of the Band switch
at FH. Use a control lockwasher and a
control nut.
( ) Connect a 1/2" bare wire from lug 2 of
crystal socket Y5 (8-1) to BS1-F3 (8-1).
. ( ) Connect
a
1/2" bare wire from lug 2 of
crystal socket Y4 (8-1) to BS1-F4 (8-1).
( ) Connect
a
3/4" bare wire from lug 2
of
crystal socket Y3 (8-1) to BS1-F5 (8-1).
( ) Refer to Detail 4-7A, and install the Band
switch and final shield to the chassis. Secure
the rear portion of the switch to the chassis
with the switch lockwashers and nuts re-
moved previously. Keep the switch in proper
alignment at all times.
( ) Black 18 BS4-F5 (8-1).
( ) Red stranded 23 BS4-R2 (8-1).
( ) Connect a 1-1/4" bare wire
from lug 2 of
crystal socket Y2 (8-1) to BSl-F6 (8-1).
17
16
21
13
8
BS2-F5 (8-1).
BS2-F6 (S-1).
BS2-F1 (5-1).
BS3-F11 (S-1).
BS3-R4
rs.r),
BS4-F9 (8-1).
BS4-F7 (8-1).
3
7
( ) Red
( ) Black
( ) Violet
( ) Black
( ) Red stranded
( ) Yellow
( ) Brown
CAUTION: When handling the Band switch (#63-
341), be very careful not te rotate either section
of
the switch or the shaft. It is important that
the rotors stay in proper alignment, or the Trans-
mitter will not function properly when completed.
( ) Locate the 5-section 8-position Band switch
(#63-341), and remove one lockwasher and
one nut from each assembly screw on the
rear section of the switch.
Save
this hard-
ware. This will leave
a
lockwasher and a
nut on each assembly screw.
NOTE: To mount the switch, position the rear
portion of the switch and final shield in place.
Then slide the 'switch shaft out of hole BU until
it is clear of the front portion of the switch.
Position the front portion of the switch in hole
FH
and slide the switch shaft back into place
into the front portion of the switch.
FROM HOLE CONNECT TO WIRE
COLOR
Refer to Pictorial 4-7 (fold-out from Page 65)
for the following steps.
Refer to Pictorial 4-7 and Detail 4-7B for the
following steps.
Connect the following wires to the Band switch:
NOTE: Position these wires as close as possible
to the chassis.
( ) Refer to Detail 4 -7 A, and prethread the ind-
dicated hole in the final shield with a #6 x
3/8" sheet metal screw.
PRELIMINARY WIRING-BAND SWITCH
Page 64