Balun for Doublet Antenna
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| Mar 4th 2019, 17:26 | |
N8EUITotal Topics: 0 Total Posts: 0 |
Hello, I'm building a 40-10 meter doublet for summer field day. I will be feeding it with 450 ohm window line. My antenna tuner only accepts unbalanced feedlines, so I will need a coax to twin lead balun to transition from the 50 ohm tuner to the 450 ohm feed line. My question is what ratio of balun should I use? Conventional wisdom would say a 9:1 balun. Is this correct? Also, should a current or voltage balun be used in this antenna design? Thank you, Tom, N8EUI |
| Mar 5th 2019, 11:08 | |
W1VTSuper Moderator Total Topics: 0 Total Posts: 0 |
http://www.karinya.net/g3txq/tuner_balun/ study of the best balun to use A 130 ft center fed dipole fed with 100 feet of 450 ohm window line and a 1:1 current balun is one of the better known combinations. W5DXP has a downloadable spreadsheet if you would like to know good combinations of dipole and ladder line length for different bands. http://www.w5dxp.com/goodbad/goodbad.htm Zak W1VT ARRL Senior Lab Engineer |
| Mar 6th 2019, 19:43 | |
N8EUITotal Topics: 0 Total Posts: 0 |
Thanks, W1VT for the reply and info. |
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