This is the first time I've heard of an "unun". I saw a picture in another thread. If I may ask, what exact purpose does an "unun" serve? It appears to be simply base loading the antenna with a coil (or it could also be a transformer of some sort). If it's a coil, it would move the center resonant frequency of the long wire down in frequency. I'm guessing it would also narrow the bandwidth. Would it also cause a sharper attenuation at the bandwidth ends? Is this the same concept as putting a wide band pass filter on the antenna system filtering out the most common frequencies of noise generating sources at the antenna? Would it be best when making one of these to actually calculate the coil dimensions and wire length resonant frequency to the center of the bands one plans to use? If it's a transformer, I assume it's purpose would be to bleed DC static charges on the long wire to ground, isolating the reciever (would that simply make it a 1:1 transformer)? I'm guessing a transformer could also do all which I mentioned up above as well. If it's a transformer, do the windings need to be made a certain way (Each coil winding resonant), or is that unimportant when using a tuner anyway?