The simple 1 : 1 balun is being know in a variety of constructions. A dedicated chapter seems appropriate
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Baluns have been discussed almost from the beginning of radio-communication and articles on this subject
are still appearing in ham-magazines. Trying 'Balun' in Google already yields million of hits.
Please contact me for more information and / or your remarks on the subjects as above, at:
Bob J. van Donselaar