Elizabeth,
The link below is a discussion of why the aviation industry has adopted a standard of 400 Hz for AC power. Briefly, the use of 400 Hz allows a device such as a motor to operate more efficiently, which, in turn, allows it to be smaller and lighter--characteristics always desirable in airplanes.
But transmitting 400 Hz power over long distances creates greater loses, so power companies have adopted a 60 (or 50) Hz standard. While certainly not an expert in this matter, it seems pretty clear to me that devices are designed to use specific frequencies, and while one might be able to alter the frequency somewhat and get away with it, this can only be taken so far.
You certainly wouldn't want to run an electric clock designed for 60 Hz on 120 Hz, or even 50 Hz. And as Viridian points out, our precious turntables are very picky about the frequency of the power they are fed!
As I hope you have gathered from some of the later comments above, you have many fans here and we would hate to see you go! I don't think it's my imagination but over the past years the discourse here has become rather coarse, and it seems most posters seem to care only that they are perceived as "right," and insult and belittle anyone who dares contradict them. [And I am not (rpt not) thinking SOLELY of our friend GK, although he may be the exemplar].
We have so few people of the female persuasion here that your departure would likely thin their ranks by 25% or more. So try to ignore the jerks, and stick around. And let's all try to rise above the petty sniping, and make this site a more pleasant place.
http://www.fcxinc.com/why-the-aviation-industry-operates-on-400-hz-power/ 
