DB4020 Dual Band 40&20M SSB QRP Transceiver Kit
Page 6
Diodes
Be careful to observe the correct polarity of the diodes. There is a dark-colored 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.
Toroids:
You may find it convenient to wind and prepare all the toroids 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, photos and instructions in the manual will illustrate
and make the process easier.
