13 Dec
2004
13 Dec
'04
8:39 a.m.
>>>> "Stan" == Stan Barr
<stanb(a)dial.pipex.com> writes:
Stan> Hi, ben franchuk said:
> Joe R. wrote: > I think you have it backward.
The motor speeds are
> the results of the > line frequency not vice versa.
>
> But you generate line frequency with a rotating machine, thus the
> speed of the generator is your limiting factor. Kind of a chicken
> and egg problem almost. Ben.
>
>
Stan> It also depends on the number of poles your motor/generator
Stan> has. Other frequencies were tried in the early days - 100Hz
Stan> for example.
Stan> (The Anderson radio transmitter at Grimeton, Sweden generates
Stan> 17.2KHz. It's a pruely mechanical transmitter using a big
Stan> generator.)
That's "Alexanderson". There were a bunch of those in the early days
-- it's a nice way to generate RF at high power without using
still-immature vacuum tubes.
paul