17 Feb
2007
17 Feb
'07
9:14 p.m.
Brent Hilpert wrote:
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.
Lets not forget EDISON promoted DC as well.
When you think about it, the RPM of the generator
is the limiting factor. You can't have your moving
parts move too fast.
Or too slow -- hamster powered night light.
http://www.otherpower.com/hamster.html