Hey Dave, about the 'shielded, balanced line' idea --- you know how the whole idea behind using twinlead (or any balanced feedline, I guess) instead of coax is because twinlead (or any balanced line, i suppose) is supposed to much less lossy --- I'm wondering if I were to make a balanced line that is also shielded, like you suggested, would this not provide the best of both worlds? It would have the convenience of shielded coax (able to be run in places that twinlead couldn't) AND perhaps also be less lossy than coax? Or would it? How lossy would such a balanced, shielded feedline be? Do you know, offhand, Dave?
I'm not well versed in RF circuitry. All I can really do is look at it in terms of it being a simple resistor, in which case, I suppose having 2 parallel feedlines would have half the ohmic losses (I think), but there's clearly a whole lot more to it than just this.


73 from grid CN89od