Today I built a J-Pole antenna and I have some strange results. Nobody around here so I thought I'd ask to see if somebody could shed some light. I built the standard J-Pole / 18 1/2 inch stub and a 39 1/2 inch radiator. Most people find a sweet feedpoint about 1 1/2 inches up from the bottom. My SWR was almost 3 at this position so I started sliding it up and found the spot about 9 inches up from the bottom. The SWR at resonance (146.400 MHz) was still around 1:2.7. The tuning curve wasn't critical at all. A lot of adjustment yielded little change. I tweaked and pruned until I finally achieved a 1:2.5 still not very good but the best I could do. Then someting strange appeared. While the antenna was still mounted and transmitting from my MFJ-249 I inadvertently took hold of it and the SWR went down to 1:1.0. Pretty near perfect. I took my hand away it it jumped back up to 1:2.5 By placing a thumb and forefinger across the radiator and the stub at about 14" up from the bottom it attained a perfect match. (???) I tried grounding the bottom of the antenna and it got worse. I tried hanging a length of wire as from the bottom and it was no better. So I took the wire off. The only thing I can imagine is that my body capacitance is acting favorably on the antenna (but I'm not going to hold onto it there so I can key down at a perfect match.... LOL) Next brainstorm was to put a small ceramic capacitor across the radiator and stub at the place where my finger and thumb found perfection but that made things worse again. What would you suggest that I use to replace a finger and thumb effect? (Sometimes I wish that I were an RF engineer so I'd know what was happening. My wife came out into the back yard and asked, "Hi Honey. Whatcha doin'?" I told her, "I wish I knew!"