Re: 80 meter bpf toroid winding 30 turns givel 4.3 micro Henrys, not 3.8


Bob Benedict, KD8CGH
 

Your PeakLCR45 measures inductance at a max frequency of 200 kHz. The material in torroid inductors has some frequency dependence. I measure my inductors at the intended frequency of use. Here's one of many articles on using a nanoVNA to measure inductance.

https://owenduffy.net/blog/?p=17298

The other point that Allison makes is to check capacitance. I used to just assume that inductors were always the problem.
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  73
    KD8CGH

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