Communication Concepts EB27A Construction Hints User Manual
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Figure 4
Install the current measurement loops on the output end of the PC board. These
are the two “U” shaped #18 wires with three (3) ferrite beads on each leg. If large beads
are used, use #16 wire for the loops. Solder the loops in place and clip the excess leads
close to the PC board.
Install T2 (remove the extra short piece of wire supplied and save it). CAUTION:
The phase of these remaining leads is critical! They must cross in an “X” fashion, e.g., if
the red wire is closest to the output transformer T3 on one side, its other end must be
installed diagonally in the hole closest to the input transformer T1 (and vice versa for the
other wire). See Figure 5.
Figure 5
Note: there are six remaining holes and the heavy five turn leads are installed in the four
(4) holes closest to the output transformer T3 (make sure the insulation is scraped from
the leads before installation!). Solder and clip the excess leads close to the PC board.
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