[subhumanderelict]

I'm not exactly sure about what the exact mechanism is that makes an antenna tune to different frequencies, but in this case, I would imagine you would have to do some modification to the circuitry. I'm sorry to say, but that's beyond me... electrical engineering is only my minor :-/ I do know the size of the antenna isn't always the most important factor. I mean, what you're using is much larger than what you would find in your cell phone, but it picks up the same frequencies, right? The only difference is how much of that frequency it detects. The impedance which the circuits may provide can determine what frequency it tunes to. So, if you're up for a challenge, you might want to read up on this stuff and try it out for yourself. Sorry I couldn't give a more useful answer...