QRP Labs QCX 5W CW, Руководство по сборке

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QCX assembly Rev 1.08
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In all cases, there is one long secondary winding, and three other short identical windings. To
make things easier, we will wind all windings together in one go, this will guarantee that the
“sense” of each winding will be the same. At the intended breaks between the windings, we will
leave large loops of wire, that we can later cut one by one to make sure the wires go in the correct
holes.
There are a lot of steps listed below but in reality, it is easier DOING it than it is writing instructions
how to do it. Take it patiently, step by step:
1) Hold the toroid between thumb and finger, and thread the first turn of the wire through
from top to bottom. Leave about 3cm of wire at the free end.
2) Apply tension to the wire after each pass through the centre hole, to try to keep the
windings tight and even. The wire turns should sit neatly side-by-side on the toroid,
without overlapping.
3) Grip the toroid between thumb and finger as you wind.
4) When you have completed 30 turns, pass the wire through the hole for the 31st turn but
leave a large loop of wire between the 30th and 31st, without pulling it tight.
5) Grip the toroid and wound turns tightly between thumb and finger, and with the other
hand apply some twists the wire loop, tight next to the toroid.
6) The result is a wire loop after 30 turns, as shown.
7) Do the same thing for two more loops, which are between the 33
rd
and 34
th
turns, and
36
th
and 37
th
turns respectively. It is easy to lose count. An easy way is after step 6, pass
the wire through the hole 3 more times, and on the 3
rd
one, make a loop. Similarly count
three more and make a loop on the third. Then finally three more turns to complete the