Guy Olinger wrote: >BL&E gave their study conductivity limits as between 20 and 100 >milli-Siemens !!!
Those who believe so might want to review the conversion from the e.m.u. units used for earth conductivity in the BL&E publication to the mS/m units more commonly used today. --> The conductivity values used by BL&E as quoted above are overstated by a factor of ten. <-- Other details that may have been overlooked or forgotten: - The BL&E tests were conducted in the sandy soil of New Jersey, where according the FCC M3 chart of earth conductivities, that state ranges from 2 mS/m to 4 mS/m. - Field intensities were measured by BL&E at a distance of 3/10 of mile from the radiator, and mathematically converted to an equivalent IDF at 1 mile. - The test frequency was 3 MHz. - Even with such rather low earth conductivity at/near the BL&E test site, the fields they measured for monopoles of ~45 degrees and more, using 113 x 0.412-wave buried radials were within several percent of the maximum fields possible for the applied power when using perfect monopoles of those heights driven against a perfect (zero loss) ground plane. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
