> "Al Wolfe" <k...@...> wrote: > > The straight skinny about the "beta" or "hairpin" match > can be found in a QST article, April 1962, by Gooch and > Gardiner. It explains how this matching scheme works. The > driven element is shortened making it capacitive.
> Then the inductive reactance of the hairpin or beta > section re-resonates the element by canceling the > capacitive reactance of the shortened element while > raising the feedpoint impedance at the same time. Theory, > formulae, and practical examples are all in the article. > > The inverse is also desribed in the article where the element > is lengthened to make it inductive and a series capacitor > used to re-resonate the antenna. > > Both of these methods have been used for years to manipulate the > feedpoint impedence of an antenna. The beta does have the > advantage of presenting a DC ground. > > Al, K9SI Bingo and thank you Al. s.
