While we are commenting on all types of baluns, you might want to look at
February and March 1980 QST, specifically figure 1. In March 1980 by W6TC.
I have used this type of balun on two TH6DXX's and a Cushcraft 2 el 40 for
almost 25 years.
Pattern plots with stations 3 miles away show very symmetrical patterns.
The advantages are that they are very inexpensive to build, and no core
saturation issues as well as almost indestructible.
Be sure to use the recommended RG-142 or equivalent Teflon coax.
Jim - KR9U
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