Bill Thank you for throwing me easy questions. Please, no existential questions like. "Why does a dog?" "How many 6L6s are there in the Universe?" or "how many angels can dance on a surface-mount, 1-k ohm resistor."
A detuning skirt is placed on a tower to make it non-resonant at the operating frequency of a station. If the resonant frequency of a tower is near or at the operating frequency of a station operating nearby or co-located, it will extract a significant portion of the radiated signal and re-radiate it in a manner to directionalize or malform a directional pattern of that station. Sometimes stations will erect towers that are nearly resonant at the station frequency, and that are not tied into the station RF system. Such towers are called "parasitic elements" If too short to be exactly resonant, they can act to direct a signal's radiated signal in their direction; if too long, away from their direction. These are call "directors" and "reflectors," respectively. A detuning circuit (not necessarily a "skirt") may sometimes be placed on water towers, TV towers, or power transmission line towers that are located near a broadcast station's tower so as to prevent such towers from malforming directional patterns, or directionalizing non-directional stations. I'm sending this out on ABDX and IRCA because it may be of interest some others. Seb'nty Threes, Charles Charles A Taylor, WD4INP Greenville, North Carolina _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com