The complete PCB at this stage should now look like this:
(The 100nF capacitor was used instead of the 47nF capacitor, for a better LF response.)
The “Messeingang” or test input is optional, but you can solder a pair of short stiff wires here
to make calibration easier in a later stage.
The last thing we need to do is to mount the output transformer.
Straighten the piece of 1 mm thick wire, cut two pieces and form them into a ‘U’ shape, with
17 mm. between the ‘legs’. Insert the transformer in the rectangular hole and use the two ‘U’
wires to fasten the transformer. Cut the excess length and solder the wires.
