On Sun, 11 Mar 2007 03:48:28 GMT, Walter Maxwell
wrote:

Apparently no one on this thread has read my Chapter 21A from my web page at
www.w2du.com, where I showed that placing one #43 bead at every 1/4 wl along a
feed line eliminated the current flowing on it while immersed in an EM field in
the 130 to 150 MHz frequency range.

Hi Walt,

A prophet is not recognized in his own country. If Art could write as
clearly as you (and to some practical purpose) perhaps his cries would
have merit.

However, as to the content of your Chapter 21A. It seems to me I had
come across this treatment some time ago. It inspired me to use your
W2DU balun specification, and spread the beads along a 20 feet length
of cable for exactly the reasons that initially motivated your first
use of them. If every quarterwave can be snubbed by one bead, then
certainly every 40th of a wave can be snubbed even more by the same
resistance. As I saw it, it was the same investment in beads, and the
same bulk resistance even if Kirchoff would point out that their
spread injected significant wavelength into this to invalidate his
lumped circuit analysis of total resistance. Be that as it may,
conceptually, the shorter element's smaller radiation resistance in
relation to the single bead sees a significantly higher port isolation
through the bead.

As for the practicality of a retro-fit, now that's another question.

73's
Richard Clark, KB7QHC