[Elecraft] Non-Resonant Antennas and Chokes

[Ignacy]

You have several choices.

1. Add voltage or current balun at tuner output. Voltage 4:1 is simpler. 

2. Connect the ladder line directly but loop the coax by the tuner a few
times around a large toroid. This is equivalent to adding a balun. Do not
ground the tuner. 

The first option guarantees balance but may add some losses. The second one
is trivial to do.  Most likely you will not be able to tell a difference.  

I used to have 70ft dipole at 25 ft fed with ladderline all the way to the
shack. Matched by MFJ-962C, which had internal balun. Never a problem with
up to 500W and even worked coast to coast on 160m!

Ignacy, NO9E

 

  





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