Hams are taken by fashion and pseudo technical discussion more than objective circuit analysis, experiment, and measurement. Nowhere is this more evident that the current fashion for “True Balanced Tuners”.
LB Cebik in 2005 in his article “10 Frequency (sic) Asked Questions about the All-Band Doublet” wrote
In recent years, interest in antennas that require parallel transmission lines has surged, spurring the development of new inherently balanced tuners.
Open wire lines require current balance to minimise radiation and pick up, the balance objective is current balance at all points on the line.
Cebik goes on to give examples of his “inherently balanced tuners”.
Above, Cebik’s “inherently balanced tuners” all have a common mode choke at the input, and some type of adjustable network to the output terminals. Continue reading Inherently balanced ATUs