A bridge is a "shorted turn" enclosure, your garage isn't conductive on all sides.
73 Don VE6JY (who has a 3 sided conductive metal shop for his DX building) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles A Taylor Sent: March 21, 2007 9:27 PM To: Mailing list for the International Radio Club of America Subject: [IRCA] R-F fields inside aluminum siding Group: Here's an observation: We've a outbuilding in the back yard. It's designed as a garage, and has aluminum siding. I've compared reception of MW stations both in and outside the building while using a DX-398 receiver. I cannot detect the slightest difference in signal strength of stations anywhere on the BCB whether I am outside or inside the building. This appears to contradict totally theory about the propagation of radio waves, viz: A conductive enclosure will prevent penetration of low-intensity E-field waves, and will set up (being conductive) L-wave fields that will tend to cancel L-waves that contact the enclosure. It's this effect that Patrick Martin observed while passing through a steel-truss bridge, and likening it to passing through a tunnel in that the metal shielded the area within the bridge from radio waves. Where is the error in my reasoning here? 73, Charles Charles A Taylor, WD4INP Greenville, North Carolina _______________________________________________ IRCA mailing list [email protected] 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: [email protected] _______________________________________________ IRCA mailing list [email protected] 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: [email protected]
