On Apr 25, 4:16 pm, Paul Keinanen wrote:
On 25 Apr 2010 14:57:32 -0400, (Scott Dorsey) wrote:

The Alexanderson puts out a very nice note.... the problem with it is keeping
it on frequency, not phase noise. Oh, also keeping it from flying apart and
exploding is another issue. It's a far higher tech device and much more
difficult to make... and also not so effective at higher frequencies.

There is still one functional station (operated one day each year)http://en.wikipedia.org/wiki/Grimeton_VLF_transmitter

Hey OM:
From:
http://en.wikipedia.org/wiki/Alexanderson_alternator

"Because of the limits of the number of poles and rotational speed of
a machine, the Alexanderson alternator is at most capable of
transmission in the lower mediumwave band, with shortwave and upper
bands being physically impossible."

Says it all?
73 OM
de n8zu