I would like to make a 1:1 balun with М1000НМ ferrite core (magnetic permeability - 1000) and 1 mm thick copper wire using triple bifilar winding. Unfortunately I didn't manage to find a clear instruction on how to determine the required number of turns. Some sources say to use 3-5 turns, others suggest to use about 20.
I would like to use the balun in 3.5-14.35 Mhz range. The target impedance is 50 ohms. I would like to use the balun as a part of a dipole, to connect a coax cable to it.
I have a lot of copper wire. If I just wind as many turns as possible (it will be about 20 for this core) will it be OK?
UPD: TWIMC I've found a great article that explains a lot about baluns and why my original idea to use a voltage balun with a dipole was not that great http://www.arrl.org/files/file/History/History%20of%20QST%20Volume%201%20-%20Technology/AntComp1-Lewallen(1).pdf
UPD2: Here is a research done by G3TXQ on RFI chokes which you might find very useful http://www.karinya.net/g3txq/chokes/