Thank you to all who replied. But, since the values I was seeing didn't match prescribed values (and it was driving me a bit nuts), I tried the experimental approach. I took a single RF Demo Kit board with the same cable. I carefully calibrated my 3 nanoVNA's (nanoVNA 2.8", nanoVNA H4, nanoVNA SAA-2N), each 50kHz to 300MHz. Then I recorded the values of the components at position 7 (capacitor) and posn. 8 (inductor) at increments over the frequency range. Results showed remarkably good correlation over reduced frequency range on all three nano's. Pos. 7 showed the capacitor to be 100pF from 0.1 to 100 MHz. Posn 8 showed the inductor to be 700nH from 0.1 to 30 MHz. Things went rapidly askew at higher frequencies, although trends were similar. The capacitor lines followed each other reasonably well all the way to 300 MHz on all 3 nano's, but the inductor curves, while trending similarly, showed marked differences in values between the 3 different nano's. As a reality check, I measured the inductor on an AADE L/C meter IIB and read 700nH. This wasn't as precise a setup as with the nano's. Curves attached
I think I'm getting a handle on this now. Thanks again.
Ed K9EK
