9
Position L1 and its winding so that you can insert the leads into the indicated square pads. Before
soldering, make sure that the insulated wire is positioned away from relay leads. Note: The toroid core may
remain somewhat loose within the winding after installation. This will not affect performance.
Cut a 2-7/8" (7.5 cm) length of hookup wire. Remove 1/8" (3 mm) of insulation from each end. Wind
this wire onto L2 (3 turns). Install L2 in the same manner as L1.
Wind L3 through L8 using
red
enamel wire and the number of turns listed below. Position the turns
as shown in the top view of the L-C Board.
Note that L8 uses a blue core, while all others use red cores.
__ L3 (5 turns, 5" [12 cm])
__ L4 (7 turns, 6" [15 cm])
__ L5 (15 turns, 12" [30 cm])
__ L6 (22 turns, 17" [42 cm])
__ L7 (30 turns, 23" [58 cm])
__ L8 (31 turns, 24" [61 cm], BLUE core)
Trim the leads of all toroids to about 1/2" (12 mm). Completely remove the insulation to within about
1/8" (3 mm) of the core, using the same method used for T1. Tin the leads. If solder does not adhere well to
the leads, you may not have removed all of the insulation.
Install L3 as shown in the drawing. (Note: To avoid damage to the rubber insulators, they will be not
be installed until the next step.) Trim the leads so that when they are inserted into their holes, L3 sits
approximately 1/16" (2 mm) above the relay pads beneath.
Fold L3 up and place a rubber insulator underneath it. The insulator has a stem in the center that goes
through the core to hold it in place. Fold the toroid and insulator back down flat on the board. Inspect the
windings to make sure they don't touch any adjacent relay pads.
Install L4-L8 in the same manner as L3.
Examine the L-C board for solder splashes or unsoldered pins (both sides).
Locate the two 13/16" long (20.5 mm) standoffs. Install one standoff at each end of L-C board using
a 4-40 x 1/4" screw and one split lock washer between the standoff and the pc board. Refer to the end view
below.
COMPONENT SIDE
