xtgabyDec 5, 20232 minGuanella 1/4 balun 1 core versus 2 separated cores.It was my friend Eric ONBEW who drew my attention to a number of articles (from G3TXQ, DJ0IP and W7EL), which mentioned that a 1/4...
xtgabyAug 26, 20231 minReceiving loop antenna for indoor or portable use revised version.New version Old version I changed the shape from square to circle. Height and width of the loop are 1 meter. This means that one...
xtgabyJan 5, 20231 minGuanella 2/1 current balunPicture: Upper core = FT240-43 1:1 curent balun Lower core = FT240-43 1:4 Guanella current balun Wires are wound in a different way! Take...
xtgabyApr 21, 20221 minThe use of a line output transformer core to make a balun.Be careful when removing the core as it is very fragile! 10 windings were made both top and bottom. They behave like 100 ohm transmission...