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Old June 20th 10, 11:18 PM posted to rec.radio.amateur.antenna
Owen Duffy Owen Duffy is offline
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First recorded activity by RadioBanter: Dec 2006
Posts: 1,169
Default Tapering open wire feedlines?

"Pete Bertini" wrote in newsiwTn.64499
:

So, I would have balanced open-wire feedline from the dipole to
the 4:1 balun followed by a 1:1 common-mode RF choke with


See my article entitled "Is a 4:1 balun a good choice for use with an ATU
on HF?" at http://vk1od.net/blog/?p=987 .

It is difficult to answer the question about the LDF without knowing the
impedances involved. I used TLLC ( http://www.vk1od.net/calc/tl/tllc.php )
to work the examples I gave, you could do the same if you know the
feedpoint impedance etc.

If you want to solve the cases for an arbitrary two wire line, try
http://www.vk1od.net/calc/tl/twllc.htm .

Owen