Thanks for the heads up Kurt. I linked to parts 2 & 3 in a subsequent reply. I found the whole series of articles to be interesting reading and hope to construct a similar Test fixture for sorting my cache of unknown ferrites into different types. It will be interesting to see how the nanoVNA performs in such an application. Noting the results you achieved using the test fixture and DG8SAQ to evaluate Type 43 ferrite cable clamps, if you still have the fixture available how about conducting a similar evaluation using the nanoVNA and letting us know if it is up to the task. With your experience in this subject matter, I'm surprised you haven't chimed in sooner.
Herb
