diy full wave 11 meter loop antenna question

[HomerBB]

I know this is an old thread, but for future reference, and to uncomplicate the transformation of an 11 meter full wave loop to a 50 Ohm feedline, I simply purchase a ready made 6' long 75 ohm A/V cable and two F connector to HF adaptors and put it at the antenna end of the feedline. To fine tune the loop I start longish on the length and adjust it down to my best match, usually 1.0:1.

 

[Onelasttime]

Perhaps because CBers only use a small slice of the RF spectrum with mono-band antennas,................................ and seem to think that the VSWR MUST be 1.0:1.

Modern CB and Exports are using non-rf mosfets that are designed for motor control or voltage regulation. If the swr goes above 1.5:1 they start poping like fast blow fuses!

 

[Dxrta]

Turn a square quad into a beam with additional reflector and director loops and the impedance will come down again! Or why not just stick with the rectangular design at 50ohms if your a coax type guy?
different combinations of balanced wire or sections of balanced feedline in parallel sounds messy to me even if it works well. I would keep it simple and make a rectangular loop between two trees or between a tree and mast or house. Bear in mind you won't get much radiation off to the sides.
Keep it in vertical polarization and away from objects. Don't lay it on / near the ground unless you are trying to defeat horrendous local noise issues. LOG is generally for receive only when suffering locally produced man made noise.
Open wire feedline is great but there is much to learn about it. I would also keep it away from objects and experiment with the overall length if using. Transformers can be good if made well and if the coax doesn't have to be too long due to losses. However transformers can also suffer a bit of loss, be badly made, become a point of failure so bear these in mind. Ideally keep losses low keep antennas in free open spaces above ground keep coax runs shorter rather than longer and keep things simple. weight up your personal options / challenges and design from there.