Heathkit SB-401 Assembly Manual page 31

( ) Install this variable capacitor at TC , with
fiber shoulder washers, 6-32 x 1/4" screws,
and #6 lockwashers. Position the shoulder
portion of the washers in the mounting
holes, and the capacitor lugs
in
holes HH,
HJ,
and HI(.
( ) Install the dial pulley assembly with the
smaller
(1/4")
hole (#100-19) flush with
the end of the shaft of this variable capac-
itor. Use an 8-32 x 1/4" setscrew.
( ) Bend three lugs of the 3-section var-
iable capacitor ( #26-92) as shown in the
inset drawing.
Detail 3-3G
,.
( ) Install this coil at TE, using the screw,
flat washer, and cork washer from each
ceramic standoff insulator. Position the
Wire from lug 1 through grommet HC, and
the other four wires through grommet RD.
Do not overtighten the mounting screws.
BEND
LUG
( ) 4 -1 /2" to lug 1 (S-1 )•
( ) 3-1/2" to lug 2 (S-1).
( ) 3-1 /4" to lug 3 (S-1).
( ) 3" to lug 4 (S-1).
( ) 2 - 3/4" to lug 5 (S-1 )•
-,
DIAL PULLEY ASSEMBLY
WITH 1 /4" HOLE
8-32x1/4"
~SET~CREW
Refer to Detail 3-3G for the following steps.
NOTE: The 3-section variable capacitor(#26-92),
that
is installed in the next three steps , would be
very difficult to replace later if it is found to be
damaged. For this reason, you should now inspect
the plates of the capacitor to see that no plates
rub during rotation. Use an ohmmeter to test the
resistance between the frame and each lug of the
capacitor as you rotate the shaft. This resistance
must be infinite at each of the three lugs. Test
again after you install the capacitor in the next
three steps.
Connect one end of the following lengths of red
stranded wire to the lu gs of this coil.
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