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41. Winding L1 and L3 toroid RF coils (two identical units ): Locate 2 of the
donut shaped yellow toroid cores provided in the kit. Cut 8" of the
enameled magnet wire and, following the drawing, thread the wire
through the core 12 times - not 11, not 13; it MUST be 12 times
through the core, pulling each turn gently tight. Winding too tightly
runs the risk of scraping off the enamel insulation and shorting the
wire. Tin each end with solder by holding your soldering iron and solder
the ends until the insulation melts away and the copper wire
underneath coats nicely with solder. Tin all the way up to the toroid
core body.
42. Winding L2: Locate the remaining yellow toroid core and cut 9½" of
enameled magnet wire. Wind 14 turns through the core using the same
procedure as above. Tin the wire ends as before. Mark this part with a
piece of tape, a dab of paint or a magic marker. We don't want to
confuse it with the other two toroid coils wound just before!
43. Winding T2: Locate the smaller of the two 2-hole ferrite cores. Cut off
one 11 inch length of enameled magnet wire and thread the wire
through the core 6 times, pulling each turn gently tight. That's 6 times
through each hole, resulting in 6 complete turns through the core.
Be especially careful not to strip the insulation by pulling too tightly
around the core. The amount of wire cut for this task is the proper
amount. If you have too little or too much, you haven't wound the core
correctly. Tin each end with solder as before. Tin all the way up to the
core body. This winding is the primary of transformer T2.
44. Cut off another length of the same wire, 8 inches long. Wind 1 turn
through the core, loop out 1 inch, twist together and run one more turn
12 turns through center of core
IMPORTANT:
Loop the first winding
around the front of the
core as shown.
14 turns through center of core
IMPORTANT:
Loop the first winding
around the front of the
core as shown.
QAMP20 • 10
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