I feel like I'm either missing, or forgetting, something stupid simple here, and I just can't think of the correct words to Google to figure this out... I've set up an OCFD out in the back yard as a strictly RX only antenna for SWL/HF. The plan was to connect it through a 4:1 balun to coax, then coax all the way back to the house and receiver. I understand that the balun is what helps to curtail common mode currents on the coax due to the impedance mismatch, thus keeps the coax from becoming part of the radiating elements as well as curtailing noise pickup on the coax. But then I've read things where it's said that ideally, coax shouldn't be used at all on antennas like dipoles, long wire, random wire, etc., and that the twin lead or ladder line should be used as a feedline all the way back to the receiver or transmitter. Which I also think I understand as keeping impedance mismatches in check by doing so. But what then keeps the twin lead or ladder line from appearing to be part of the antenna and then making the dipole MUCH longer/larger? I understand that my OCFD set up is naturally an unbalanced antenna, and I think that's where I would be using a 1:1 balun? But if I were to make it center fed dipole, that would then be a balanced antenna, fed by balanced twin lead or ladder line. I don't think I would be using a balun, or an unun here, and I can't recall ever seeing anything listed as a balbal...what then keeps the feedline from just appearing to be an extension of the dipole?