Hello TowerTalkers,
Another inquiry for the neural network. Do any of you have practical
experience with the simple Guanella choke balun? I learned about this from
either the ARRL antenna book, or Jerry Sevick's book on making baluns and
ununs (not a misspelling).
There is a clever way to wind coax around a ferrite core such that it enters
and leaves the core in an in-line manner: eg., the coax enters and leaves in
positions 180 deg apart. You wind 1/2 of the core, then cross over to the
other side, and continue winding in such a manner as the turns always pass
throu the center of the core in the same direction. This effectively chokes
off the RF from the outside of the coax shield
I have used this on some homebrew, coax-fed, fan dipoles, placing the core
inline at the antenna feedpoint. Using RG-58 yielded close to 12-15 turns on
an FT-240 size core. The performance seemed good, with no TVI reported.
I would like to try using a simple 1:1 Guanella balun with an unbalanced
tuner to feed antennas having parallel feedlines. Any comments or
experience?
Thanks,
--...MARK_N1LO...--
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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