Greetings folks;
I started building the balun kit, and I am suffering a bit of confusion,
that I hope to get some help straightening out here.
1. In my ignorance, I cannot tell whether I am building a 4:1 or 1:1
balun; though the included instruction sheets are almost the same
(the BL1 refers to a Binocular Balun core - I assume the ferrite
core with parallel holes, the BL1-1 does not in the parts lists,
both refer to winding the balun. They both refer to winding three
turns around the balun core.
So, ignoring the question of what I ordered for a minute, how do I
tell which I am building?
2. There seems to be no way to get three turns around the core with
the wire length provided; the instructions show what appears as
the wires starting on one side of the core, through, around so on,
so that you end up with 3 windings visible around the outside edge
of the core, starting at one side and finishing at the other.
I seem to be only able to get 2 turns, leaving 1" on one side, and
about 2" at the other, with the windings pressed fairly tightly to
the core.
If I take the prescribed 10" length, subtract the 1" off both
ends, I am left with 8" with which to get the 3 turns, the
circumference of which calculates for me to be 3*3" or 9"... (I
am assuming each turn takes 1" through, about .5" to make the
turn, another 1" around, and another .5" to make the turn to go
in, making 3" per turn) -.5" because the last winding need not
turn and another .5" because the first "through need not turn
either, so 9" - 1", = 8", the remaining length, so it would seem
to be in theory possible.
But in practice, I am failing to be able to perform this feat. I am
hoping there is some simple if you know it trick to get me rolling again.
Thanks in advance!
--Dave
--
David F. Reed - W5SV - cell: 512 585-1057
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