I remember something about “night effect” from my CPL exam days and being told that at dusk or dawn you could kiss the ADF goodbye. My ATP examiner told me that he lost his crew chief in an NDB related accident in a DC3.
The NDB letdown into Bankstown under radar control from YSSY approach was probably the best approach but my main use for the ADF was to tune into a commercial radio station and use it to find the city I was going to.