At 03:18 AM 7/19/2007 -0400, you wrote: >If it's Part 15, it's limited to 100MW ERP from each transmitter into a 3 >meter antenna.. otherwise it isn't legal.
Paul, What Part 15 says is that the D-C input into the final shall not exceed 100 mW*, not 100 mW ERP. Also, the total length of the antenna, feedline and ground connection shall not exceed 3 meters. * You mean mW=milliwatts. MW=megawatts! Effectively, that means the final is going to be VERY close to the antenna. Reading the "letter of the law," I see no averse language that prohibits a complete radial system. THAT would make a BIG difference in a 100 mW's reach/coverage. Also, since the D-C input is fixed at 100 mW, I see no averse language that limits the R-F input to the final to any level. That means, for example, if one uses a grounded-grid or grounded-base final, if driver feeds 50 mW into the final it will also appear in the output for a total of 150 mW! It looks legal to me. Our barn has a galvanized roof and years ago I took the time and trouble to bond the sheets together.I also put up a 10-foot mast atop the center of the roof. But I never carried through and put a 100-mW transmitter up there. I may go berzerk and put the mast back up and try a small BC station or beacon. >Meaning, they can synch more then one transmitter together as long as none >of the individual transmitters exceed 100MW ERP with a 3 meter antenna Got that right! 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]
