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I know that It takes a 120v ac(wall supply) power supply and
outputs 300v ac.
A picture of it can be found at..

http://s3klyma.110mb.com/Transistor.jpg

I want to know if it is a transistor.. or what it is, I got it from an
old radio/cd/cassette player.

I have stated one question that I have about it, and now a simpler one.. this um.. something.. seems to multiply the
voltage two and a half times.. is this true, or does it have
some sort of controller on it that reads the voltage, and no matter the input, outputs the 300v?

I figured that I might also want to add, that in the picture, in the outlined area, which is plastic, I can see through it enough to know that all that is in there, at least in the outer part, is copper
wire..

Thanks very much