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