Re: Topband: Best wire antenna for roof top location

2015-08-08 Thread Mirko S57AD
replaced sloping dipoles with sloped yagis for 80m (3 el toward NW (USA) and 2 el toward NE (Japan). With halfwave sloping dipole we managed to QSO KH6 on 160m, very though contact from this part of Europe. Maybe building acted as kind of reflector on this band... 73, Mirko, S57AD 2015-08-08 1

Re: Topband: question about antenna bandwidth

2012-05-07 Thread Mirko S57AD
I don't know how much bandwidth you could get with coaxial quarterwave transformer (say, two quarterwave lengths of coax in parallel to transform 12 Ohm of an inverted L to 50 Ohm)? In previous life I was used to use quarterwave 75 Ohm cable to broaden bandwith of 80m dipole(s)... 73 Mirko