[TowerTalk] Baluns

[Dan]

I recently purchased Sevicks new book "Understanding,Building, and Using Baluns and Ununs" . It covers designs with ratios from 1 up to 16. I particularly like the fact that he talks about power ratings and the effect of mismatch terminations on baluns and ununs. He discusses various commercial baluns and he is quite outspoken about the weaknesses in  many of them. For 1:1 use, he rates the W1JR balun design as superior and devotes quite a bit of space to it. His measurements showed no advantage to the cross over design versus the conventional progressive winding but the crossover system does bring the ends of the coax out on opposite sides of the core, a mechanical convenience. 
  Fortunately for us, the W1JR design is very simple to build and I plan to continue using it and retiring my ferrite bead jobs. 

73, Dan, N5AR