Hi Dave
Here My graphical illustrations of :
1) a 50 Ohm resistor thru a 1/1 balun Zc = 62 Ohm : real & X values change just a bit cross the 30Mhz band.
2) Same 50 Ohm resistor thru a 1/1 balun Zc=142 Ohm: real & X values change a lot cross the 30Mhz band , we need to adjust again the antenna to have a good SWR over the bands .
Both have a 50 Ohm pure resistor at Low frequency's .
That what I mean by imp¨¦dances changes with this below illustrated graphical data's , John have the good question , did we really need a mutched CRC impedance to the system ?
My hunble response : Yess it's prefered to have a muched CRC impedance , otherwise we may need to retouch the antenna dimensions to tune again the overall system .
73's Nizar .
