QRP Labs QCX-mini, Assembly Instructions Manual

Page: 79 / 133

IF it is an electrolytic: (any small capacitor
rated>10uF, 16V).
Identify – and + wires (polarity is critical).
Diameter max 5mm, length max 9mm.
Cut the negative wire to approx 6mm. This
wire will be soldered to the left-hand terminal
of the AMS1117-5.0 voltage regulator
Tin the negative wire of the capacitor with a
small blob of solder, which will make it
easier to the voltage regulator pin. Tin the
left-hand voltage regulator pin too. Put the capacitor lying horizontally in
position, with the positive wire passing
between D33 body and wire. Solder the
negative wire of the capacitor to the left-
hand (ground) pin of the voltage regulator.
Cut the positive capacitor wire at the point
where it meets the D33 diode wire. Solder the positive capacitor wire to the D33
diode wire as shown.
QCX-mini assembly Rev 1.05_Fr
79