16-04-2017, 12:26 PM
1930s editions of the Broadcaster Trade Annual include supply voltage and periodicity, if any, for the "principal provincial towns", and a right old mix it was. Several places in 1933 - Bedale, Bettws-y-Coed, New Radnor and Thetford among them - had 110 V supplies, while at the other end of things some had only primary supplies of 400 or 440 V. Bourton-on-the Water 120, Leyburn 130, Somerby 100, Oldbury 110 or 190. Mostly at 50 cycles, but a fair few at 25 or 40 or 100. Glasgow Corporation is listed as providing 250 and 440 V AC , and 250 or 6500 DC, but presumably the last of those wouldn't have been available to the ordinary householder (anyone for transformerless mains-derived EHT? )
