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and the PCB. So no current can flow. This is easy to check, using a DVM to check for DC continuity through the
inductors.
The same thing applies equally to L4, and the windings of T1.
T1 transformer
The transformer T1 has multiple functions. It is used for band-pass filtering, and to split the phase of the incoming
received signal into two paths, with 180-degree phase difference. These are fed to the double-balanced quadrature
sampling detector (IC4).
Bear in mind the circuit diagram fragment and the section of the PCB layout diagram:
