QCX assembly Rev 1.08
49
3.55
Wind and install transformer T1
Now we come to the only really tricky piece
of the assembly, which is the receiver input
transformer T1. Follow these instructions
carefully, it is tricky but quite feasible if you
go step by step.
In the end, you are going to end up with an
installed transformer which hopefully looks
something like the photo (right, shows 20m
version).
This transformer has FOUR windings.
Three identical short windings, and one
long winding. There are therefore eight wire
ends, which must all be soldered into the
correct holes on the PCB, and with the
enamel properly removed.
Here are two diagrams which enumerate each of the windings, wire endings and holes on the
PCB, on both the layout diagram and on the circuit (schematic) diagram. It should help to explain
diagrammatically which wires must go where.
On the following page is a diagram hand-drawn by Ed WA4MZS (thanks Ed!) which may also
clarify the construction and installation of T1.
Summary of Contents for QCX 5W CW
Page 9: ...QCX assembly Rev 1 08 9...
Page 10: ...QCX assembly Rev 1 08 10...
Page 12: ...QCX assembly Rev 1 08 12...
Page 50: ...QCX assembly Rev 1 08 50...
Page 105: ...QCX assembly Rev 1 08 105...
