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tools of the trade
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FT240-43 wrapped in Scotch #27 tape
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Panavise holding the pair of #14 AWG wires for binding
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bifilar winding, bound with Scotch #27 tape
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preparing for the first winding
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halfway there, and then the crossover
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completely wound
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shot with extra length (I used 33", but could have gotten away with less)
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scale comparison
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preparing to drill the box for SO-239
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the perfect fit
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interior view
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insert SO-239 "wrong side in" to help with drilling holes for #4-40 bolts
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bolt holes drilled for #4-40 hardware
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first trim
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how much more should I trim?
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sizing it up
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enamel scraped and wires prepared
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final product! continuity checks out okay, too
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calculated impedance for 136 uH choke