17 Feb
2007
17 Feb
'07
8:48 p.m.
Chuck Guzis wrote:
coke-oven (producer) gas. For some reason never made
clear to me,
one of the competing "standards" for AC distribution was 25Hz (both
50 and 110v).
Didn't the 25 Hz stuff have it's origins in turn-of-the-century
electric-train/streetcar technology? ..such established systems then being
extended into residential/industrial use in some areas. There were a few
30's-era radios made for 25Hz, distinguished by their oversize power transformers.