I've cobbled together a monstrosity from lengths of coax I had at hand. Just a prototype/design test. If the design proves out I'll rework it with quality components (CopperWeld or FlexWeave, etc.) and a quality 6:1 current balun. The antenna is a 3-element (3x half-wave in phase) collinear dipole, cut for 50.000MHz; I'd rather tune it with capacitive reactance than inductive.......good quality roller inductors are getting impossible to find (even Fair Radio is sold out of most of theirs!) Anyway, is there any reason why I shouldn't use 450-ohm window line for phasing stubs? Or 300-ohm twin-lead? Parallel line is very handy for phasing stubs; it couldn't get any easier. But, this is a VHF antenna and I suppose it's possible that some type of twin-lead or window line might not cancel due to conductor spacing. Paranoia or real concern?