Rob:
A typical 3/8 wl inverted-L antenna is about 65 feet vertical and 125 feet horizontal or sloping back downwards at a slight angle. This means that 2/3 of the wire is horizontal near the ground and is a high angle radiator - semi NVIS - and the vertical part is radiating at a low angle. Not good unless you want to work a lot of US and nearby VE stations. It would be best if you can model the various configurations of 1/4 wl, 5/16 wl and 3/8 wl inverted-L antennas on a PC so you can see the results on the monitor and print them out for evaluation. IMHO going beyond 160 feet of wire inverted-L (5/16 wl on 160 meters) is not the best solution. Just my 2 cents worth 73 & GL George K8GG > Thanks, gentlemen (Eddy, K8GG, ZR, Roy, Herb, et. al.), for all the > feedback on this. So, it seems it's pretty much what I expected -- > if you tune an antenna for better results on one frequency, you > detract from its operation on another. Maybe one of these days I'll > get around to playing around with that 3/8 wavelength L anyway... > > Rob / KD8WK > > On Mon, May 07, 2012 at 03:22:19PM -0400, Herb Schoenbohm wrote: >> Another rule for this is "the lower the Q of the matching network the >> greater the bandwidth." >> >> Herb Schoenbohm, KV4FZ >> >> On 5/7/2012 1:48 PM, Roy wrote: >> > If I were to extend my 1/4-wave inverted-L to a 3/8-wave L, and tune >> > out the inductance with a fixed capacitor at the base, what would this >> > do to the broadbandedness of the antenna? >> > >> > There is an old basic principle to remember about this, "The fewer the >> > components in general, the broader the bandwidth." >> > >> > 73, Roy K6XK > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
