Hi, I wasn't sure whether to post it here, or in the theory area, but here are my questions:

1) I recently bought a VHF receiver, and it says to use an antenna with a length 1/4 of the wavelength. What if I used one that was 1/2 the wavelength, or full wavelength?

2) (Quarter wavelenght would be something a little over 2 feet for VHF Air, I believe.) If I used an arbitrarily large antenna, say 20 feet, Would I get any better reception?

3) What would be the difference between using the antenna vertically or horizontally?

Any help, would be appreciated, even if you only give me a website (Teach a man to fish...). I tried looking it up online already, but I got really basic stuff that I've known since I was 12.

Thanks,
Josh