I'd like to try building a loaded Yagi. I came across plans for a 20 meter
mini Yagi while Googling, but I want something for 15 meters. Are there any
simple, free calculators available? Also, can anyone tell me a ballpark
figure how a 15 meter shortened (by 40%) 3 element Yagi would compare to a
full sized one? How about if I added an additional element for 4 loaded
elements instead of 3?

Thanks,
harry