How would perform a twisted military wire (I believe it's characteristic impedance is about 100 ohms ) feedline and then opened as a doublet? Would the feedline still be low loss or a 450 ladder line is better? Mechanically the twisted military wire seems very strong albeit very light. I have a basic MFJ tuner with an internal voltage 1:4 balun. Given the rather low impedance of the feedline would you prefer to use that internal balun or would you use a common mode filter between the tuner and the feedline or the common mode filter between the tuner and the transceiver?