I went to here: **broken link removed**
and they say I can make a transmitter that transmits between 470 and 650Mhz with an almost-standard transmitter setup. It seems what they done was made the emitter resistor very high.
**broken link removed**
I wonder if that was my problem all along... insufficient resistance. When I tested it with mpsh10 transistor, I see mini modulation bubbles at the top of some input peaks but most of the time I saw a straight line. Now I think I need a better transistor.