Topband: 1:4 Guanella (current) balun experiences ?

[Thomas Herrmann]

Are there available any good experiences with 1:4 Guanella (current) balun, consisting of 2 separated coax air coils (1:1 baluns) on TopBand with high power ?

Do the coils should have any coupling (capacitive or inductive) ?
Are air coils useful instaed of ferrite core coils ?
Are coils of 50 ohm coax useful or should I use 100 ohm wire to transform ~ 200 ohm into ~ 50 ohm ?

Thank You in advance.
73 de Thomas, DL1AMQ




     
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