3.4 Wind and install Low Pass Filter inductor L6
Measure and cut 34cm of the 0.6mm wire for winding inductor L6 which is wound on a T50-6
toroid (yellow). The number of turns and inductance of L6 is given in the table below:
Band
Turns
Inductance
80m
27
3.01uH
40m
20
1.70uH
30m
17
1.26uH
20m
14
0.904uH
Start the winding as shown (1). Remember that each time the wire passes through the hole of the
toroid counts as “1 turn”. Wind the wire as tightly as possible on the core. Wind the turns bunched
up next to each other (2). When the number of turns is correct, spread them out evenly around the
whole core (3). This method slightly tightens up the windings a bit more, as they are spread out.
Position the wires perpendicular to
the toroid and cut the wires at a
length of 5mm (4).
Scrape the last 5mm of the wires
using a knife or wire cutter and tin
them (5). Install and solder (below).
50W QCX PA kit assembly
1.00q
13
