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Most likely both pieces of wire are AWG28 under the insulating paint. If you have an
ohmmeter you can easily test for presence of insulation by testing for conductivity.
Size of wire actually makes little difference in inductance when winding onto toroid
cores. It is the number of passes through the core that controls inductance. Since
there is a little distributed capacitance between windings it is possible to slightly tune
the windings by spacing or squeezing the turns.
On Tue, May 12, 2020 at 3:18 PM <KC2UOK@...> wrote: