Question, someone was telling me that you have to get permission from the airport to monitor the freqs....that true?
I believe that someone was referring to UK regulations as Lezam stated.
Also, can someone still answer my question, how well with a 2 m jpole will a sporties handheld radio put out, and how will the quality be
Are you referring to a 2 meter copper J-pole? ...or a simple roll-up J-pole?
I don't see the purpose of using a copper J-pole with a handheld unless you use that handheld like a base station. I can't imagine a person sitting at the airport with a sporty's handheld leaning on his ~70cm long copper J-pole (roughly 2.25 feet) antenna, but I'm not saying you can't (although I'd like to see the picture
It is very dependant on the transmitters, their power output, surrounding terrain, and distance from the transmitter. VHF is line-of-sight, so pilots (being in the sky; above you) shouldn't be hard to receive in most cases, but ATC facility's low-power transmitters that are either obscured by terrain or are low-power transmitters will make it difficult to receive the controller side of the converstation.
Please clarify on which J-pole you're referring to and possibly including the purpose/use that you're trying to achieve (ie: Listening from home, at the airport, etc, etc) so we can answer your question(s) further.