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#2
July 6th 09, 03:41 PM
posted to rec.radio.amateur.antenna
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2 baluns on doublet feedline to overcome impedance changes?
wrote:
1) would a balun at the antenna end of the line (where the impedance is much lower) maintain balance in both antenna and line? The antenna is balanced. The feedline is balanced. What you would need is a BALBAL, not a Balun. I haven't seen any BALBALs advertised lately. 2) and then how about another balun at the l-match end of the line, for frequencies where the antenna-end impedance is high? When I ran into the same problem, I decided to adjust my ladder-line length per band so the balun would always be looking into an impedance between 35 ohms and 85 ohms. http://www.w5dxp.com/notuner.htm No tuner equals no tuner losses. -- 73, Cecil, IEEE, OOTC, http://www.w5dxp.com |
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