"Repeating Rifle" > wrote in message
...

| I must admit that I do not know for sure, but multipole alternators
probably
| came before the electrification of Niagra. Hydraulic turbines could not
spin
| at synchronous speed.
|
| The trouble with multipole alternators is that they will be larger.
Because
| they turn slowly, they require more torque for the ame amount of power
and,
| therefore, must be built more ruggedly.

http://www.antiquewireless.org/otb/60cycles.htm

N