The End-Fed Half-Wave: One Wire, Every Band The end-fed half-wave trades a centre feedpoint for a transformer and one support. This guide covers the unun, the multiband gift and the counterpoise. Quick facts Unun ratio 49:1 Wire for 40 m ~20 metres Bands free 40/20/15/10 m Support one Honesty item counterpoise At its end, a half-wave wire shows a few thousand ohms; the 49:1 transformer translates that to coax territory. The same wire is two, three and four half-waves on the harmonic bands - which is why the antenna lives in every portable kit. Free tool and guides: MorseCodeWorks Morse Code Works - free Morse code tools and guides. Reference chart