Nice to see one of the articles mention the wavelength: 2000 metres. That translates into 150 KHz, deep into Long Wave, given that 530 KHz is the bottom of today's broadcast band.
To put that in perspective, pioneering station KDKA Pittsburgh was broadcasting on 360 metres at the time, which translates to about 830 KHz.
Since most radios of the era were home-made, it probably required some adjustment, or even new parts, to capture such a low frequency as The Province was using.