<< This sounds really similar to a lot of plans that I've seen... One other piece that I've noticed on many of these that no one seems to ever mention is that the two 1:1's are usually wound in opposite directions on each half of the core... I'm assuming this helps to reduce the coupling between the two 1:1's? Also I'd be interested to hear people's thoughts on this "improved balun"... Seems to be an attractive solution. It only pictures the schematic here and I kinda picture it as being wound similarly but you wire one of the turns on one of the feeds from "out" side to "in" side. Essentially the ends of the wires would fold back over the core to get to its location>>
If you are talking about two cores in the balun, and each core wound with half turns and then flipped with a transposed winding, everyone who has measured the fancy winding concludes it does nothing overall except move things around. If you are talking about winding two 1:1 baluns on a single common core and using that to make a 4:1 current balun, I can guarantee you that will not be a balun. It will unbalance any balanced load placed on the balun's balanced terminals. Each transmission line transformer has to be on its own independent core. They cannot share a common flux path. 73 Tom ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
