ILER-20 MK2 SSB QRP Transceiver Kit Page 6
Finding the correct component:
IC's
The component outline for the IC printed on the circuit board has a “U” shaped notch on one end,
indicating the end at which pin 1 of the IC is located. There is a similar notch on one end of the IC socket
that should be or iented over the “U” printed on the circuit board. Finally, pin 1 of the IC is also marked
with a sm all dimple or dot; this end of t he IC should be or iented towards the notch in the I C socket or the
"U" of the component outline.
Diodes
Be careful to observe the correct polarity of the diodes. Ther e is a black band towards one end of the
diode. This band should be oriented towards the line printed on the component outline of the circuit
board.
Electrolytic capacitors:
These must be placed with the correct polarity. The positive lead (+) is always the long lead. The
negative terminal (-) is the short lead and is marked by a stripe on the body of the capacitor. Make sure
that the positive lead of the capacitor goes through the hole marked with a "+" on the circuit board.
Coils and transformers:
You may find it convenient to wind and prepare all the coils and transformers before beginning to mount
the components. That way you won't have to stop and possibly lose concentration while winding them.
This is the part of the construction that some consider to be the most difficult. I personally find it to be
one of the easiest stages, and it can even be relaxing. Look for the most appropriate moment to do it,
and most importantly, take your time. The drawings and instructions in the manual will i llustrat e and
accompany you in the process.
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