I can not find anything but 300 to 75 ohm balun antenna matching transformers at Radio Shack or any other place in town.
I found instruction how to make a 1 to 1 balun but there are no details on the, number of turns, wire size, or ferrite donut.??????????
I have several ferrite donuts, small, medium and large. Picture in Amateur Radio Handbook looks like 8 turns of enamel coated copper wire but picture online shows about 20 turns of insulated house wire. I need LOW LOSS for a 16 element collinear array TV antenna for my HDTV.
I could buy a balun if I could find one at a reasonable price. I don't think $15 plus $10 postage is a good deal.
My antenna is a 16 element collinear array 75 ohms with a 75 ohm coax cable to the HDTV. Frequency range is 180 to 692 MHz.