On Sat, Jan 4, 2020 at 11:24 AM, gary wrote:
Besides the Steber article on the nanoVNA, there is an article on a "Simple Inexpensive Accurate Vector Impedance Meter" by Koehler on page 23 that describes the design of an instrument nearly identical to the nanoVNA. Good information on the design considerations and how it works, Thirdly, there is a Technical Note on page 32 from Stensby describing a method to determine coax cable losses by making open and short-circuit measurements of reflection coefficients.
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For those not aware, ARRL has made the associated files for the "Simple Inexpensive Accurate Vector Impedance Meter" article publicly available at, .
As gary noted, the design is built along the lines of the NanoVNA, however; it is a desktop box without a display. An DIY adapter for making coil and capacitor measurements, useable with the NanoVNA, is also included in the file archive.
- Herb
