No, I don't believe 240' is too high - especially if the tower has a base insulator! It would be so close to 1/2 wave on 160, that it could be fed very well as a 1/2 wave radiator on 160, either via a parallel tuned tank or a 1/4 wave of perhaps 450 oh ladder line. A 1/2 wave radiator wis an excellent transmit antenna, and, because of the high feed-point impedance can be driven against a very modest ground arrangement
Like you, though, I believe they would do well to put up some terminated loops, or perhaps a Beverage (or 3?) for receive antennas! A 240' vertical would, I think, be a VERY noisy receive antenna. If they put up a KAZ terminated loop that only requires one overhead support, they could steer it around with ropes and weights on the ground. The KAZ is like ON4UN's FO0AAA 160 receive loop. 73, Charlie, K4OTV -----Original Message----- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Richard Karlquist Sent: Tuesday, February 25, 2014 3:38 PM To: topband@contesting.com Subject: Re: Topband: AM broadcast tower and 160m dxpedition Congratulations on your adventure. In the past, I have seen some of these AM tower efforts ruined by lousy receive conditions. I suggest you get an advance team out to the site to check out the noise level etc. and maybe put up some temporary beverages, loops, whatever and LISTEN on them. Use WWV and WWVH on 2.5 MHz as a beacon. Others can comment on whether 240 feet is too high. Rick N6RK _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband