Steve, I will try an answer your question from a broadcasters point of view. I have a general understanding of RF and FCC stuff.
When you see a station's licensed power listed, it is almost always for a 1/4 wave tower. When I was at WQMA 1520, our tower was 150 feet which is 1/4 wave for 1520 Khz. If the tower is taller then 1/4 wave, it is therefore more efficent then it needs to be. If a tower is more efficent (taller then required) then you don't need quite as much power to make the same coverage area that a slightly shorter tower would produce. Most stations elect for 1/4 wave towers, much much cheaper to build. Paul Walker www.onairdj.com P.S. I think Powell would even agree I explained this one well. On Thu, Oct 30, 2008 at 12:23 PM, Steve Ratzlaff <[EMAIL PROTECTED]>wrote: > As an AM TX and general domestic AM dummy, what does all this mean, about > not being able to put a 1kW signal into some type of tower? What does the > power and or tower have to do with not being able to feed full power into > the antenna? > Steve > ----- Original Message ----- From: "Paul B. Walker, Jr." < > [EMAIL PROTECTED]> > To: "Mailing list for the International Radio Club of America" < > [email protected]> > Sent: Thursday, October 30, 2008 9:44 AM > Subject: Re: [IRCA] QSL request > > > There was an AM not far from me at WABV, that was on a Class C Channel and >> supposedly had a 5/8 wave tower.. and put the full 1KW into the tower. >> >> Glad we could try and help! >> >> Paul Walker >> www.onairdj.com >> >> >> On Thu, Oct 30, 2008 at 6:36 AM, Craig Healy <[EMAIL PROTECTED] >> >wrote: >> >> The station that received the QSL is WNBH-1340 in New Bedford, MA. The >>> report came from Finland. There have been a few reports from Scandinavia >>> in >>> the past few years. >>> >>> WNBH is a bit of an anomoly in that it has a tall tower, yet puts the >>> full >>> kilowatt into in. No power cutback to make it an equivalent >>> kilowatt/quarter wave tower. On vacation on Monhegan Island off the >>> coast >>> of Maine I could hear WNBH if I nulled the other pests. It does get out >>> well. >>> >>> Thanks to all for the ear work! >>> >>> Craig Healy >>> Providence, RI >>> >>> _______________________________________________ >> 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] > > -- Sincerely, Paul B. Walker, Jr. www.onairdj.com [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]
