I have started to experiment with EZNEC and am
modeling a couple of loop antennas including
some delta loops. I see references to hams
using 4:1 baluns with these antennas, but the
models I see show a feed point impedance of
roughly 100 ohms. I'm not sure how a 4:1 balun
would help - what am I missing?

Thanks and 73,

Tad Danley, K3TD