Thread: 2 baluns on doublet feedline to overcome impedance changes?
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Old July 6th 09, 03:41 PM posted to rec.radio.amateur.antenna
Cecil Moore[_2_] Cecil Moore[_2_] is offline
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First recorded activity by RadioBanter: Mar 2007
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Default 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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