Jim wrote:
> The moral of the story is that you have to watch that air gap. When you
> split your toroids, if a bunch of the material crumbles away you will
> have an air gap.
I use a machinist vice to do the dirty deed. By separating two blocks to the
approximate diameter of the toroids, and using a drill bit on the opposite side
of the core, in the middle between the blocks, the vice will split them in two
nearly perfect every time. As long as you keep the halves matched up in pairs,
they can be placed back together with an almost imperceptible crack between
them. I think the coupling in this manner is actually much better than the
traditional split cores could ever be.
I'm getting lots of conflicting information regarding this stunt (some through
this list and some direct). Some feel that the cores with one turn through
them will not create enough resistance to make much, if any, difference in the
noise. I still have not decided what to try next. Buying 48 to 96 cores at
$1.20 to $1.70 each, and snapping them in two, seems like a waste of money,
energy, and otherwise perfectly good toroids if it is not going to work. How
much RF resistance would be required to make a noticable difference? I'm not
smart enough to know. Perhaps others on this list could provide some guidance
for me. Is 20 ohms on each COP enough? Is 50 ohms enough? How about 300
ohms? I have no experience with this type of problem and therefore I'm truly
clueless.
Ford-N0FP
ford@cmgate.com
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