I have been wanting to build a J-Pole for FM reception. My question is: If I build it tuned for the middle of the FM dial, how does this affect the rest of the bands reception? Since we all get good reception with various antenna setups, does the tuning of a J-Pole diminish the reception of other channels? This is just a long buried project I have always wanted to build just for the heck of it. Now the copper pipe fittings and attachment plate are getting in the way and I need to build this before I use the fittings for plumbing!