Thanks. That makes sense and should work out quite well for a harness external to the mast. Of course the quarter wave of 125 ohm coax will still be required inside each dipole, but the use of all 50 ohm coax beyond that point simplifies construction.
Apparently Sinclair had different ways of doing it, perhaps depending on the exact model. Or maybe they changed the harness design at some point. Paul N1BUG Larry Horlick wrote: > > > I have a drawing from Sinclair that shows 4 stacked folded dipoles (it > does not indicate an > antenna model) using all 50 ohm cable. So using the 210C4 harness > picture from the link > below as a template, this is how it's done: > > Feedlines from dipole A, B, C, and D are any length, but identical. A > and B go to a tee, > C and D go to another tee. The feedlines from the output (if I am > allowed to use that rather > crude term!) of these tees are any odd 1/4 wavelength (but do not have > to be the same) and go > to a 3rd tee. The output of this tee is 50 ohms. I suspect that the > harness does not affect the > pattern, but rather it is the dipole to mast spacing. > > lh
