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Install C2, C4, C6, C8, and C10 100uF 25V polarized capacitors. These are polarized capacitors,
so
make sure they are installed with the correct
polarization. The black stripe on the top of the cap
matches with the stripe on the outline on the board. Electrolytic caps can be a bit difficult to install.
small
Lightly pre-tin one pad.
You want a
solder bump.
Then place the cap on the pads and heat the
cap leads until the solder melts. When both pins are soldered,
gently
rock the cap to make sure it is
completely soldered down.
Figure 17. L2 mounting details
Install L2. This inductor is wound on a FT37-77. The FT37-77 is the only core of this type in this kit.
This inductor is wound using 51 T (3 ft) of #32 gauge enamel wire. The #32 wire is the smallest gauge
These turns are wound as close to each other as possible.
wire in the wire bag.
L2
is center tapped at 24 T from one end, 27 T from the other. This tap point connects to terminal #3 of L2.
I place a twisted loop at the tap point, then snip off the loop when finished and solder the twisted leads
together. The far two ends of L2 connect to terminal 1 and 2. There are 27 T between terminals 1 and
3, while there are 24 T between 2 and 3. Refer to the picture above for additional detail.
Norcal NC2030 v5
12-18-05
Page 26 of 128
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