DZ HT-7, Инструкция по сборке, Страница: 16 / 44

Page 16
pacitor (C6) in the same man ‐
ner as the previous capaci ‐
tor.
( ) Load and solder the 10uF/25V
electrolytic (C2) in the same
manner as the previous two
capacitors. This capacitor
has a smaller radius.
( ) Load and solder the 22uF non ‐
polarized capacitor (C26).
The orientation of this ca ‐
pacitor does not matter even
though one lead is longer.
( ) Load and solder U2, the 14 ‐
pin dual ‐ inline package (DIP)
IC. Be sure that pin 1 is
placed in the square pad. The
notch on the end of the part
is closest to the edge of the
board.
( ) Load and solder Q2, the tran ‐
sistor with the metal can. It
can only be inserted one di ‐
rection, but make sure the
tab lines up with the marking
on the silkscreen. Make sure
this transistor lies flat
against the board.
( ) Insert all 12” of the red
magnet wire into an FT37 ‐ 43
toroid core, leaving 2” out ‐
side. Wrap the wire nine
times around the core, pull ‐
ing tightly on each turn. Re ‐
member that each time you
pass a wire through the cen ‐
ter of the core counts as one
turn. Spread the turns out
evenly, covering about 2/3 of
the toroid. Cut the excess
lead off, leaving 2” outside
so that the two leads have
the same length. Save the re ‐
maining wire for use with T3.
Wrap the 3 ‐ turn secondary us ‐
ing green magnet wire around
the toroid, overlapping the
primary as shown in Detail 1.
Detail 1. T2 winding
( ) Place T2 flat against the
board and insert the primary
(red) leads into the holes
marked 1 and 2. Insert the
green wires into the holes
marked 3 and 4. Pull the
wires tight from the bottom
of the board so that the tor ‐
oid lies as flat as possible.
Cut the excess lead length
Green
Red