I have gotten good measurements on a variable capacitor doing it exactly the same way I measure an inductor. I use only CH0 and measure reflection (S11). I connect the 2 conductors from CH0 to either end of the capacitor. I get a pretty stable result at any frequency from 100 kHz to several MHz. My capacitor (14 - 387 pF) hits self-resonance up around 21 MHz, and then shows inductance, when turned to the low-C side. I get the C value from the CH0 Smith chart.
toggle quoted message
Show quoted text
On Sep 16, 2021, at 9:38 AM, Joe WB9SBD <nss@...> wrote:
OK,
I wandered the group site for a long time and went to the HOW TO on the wiki site, Nothing helped me.
I have the steps for measuring an inductor down solid. And have probably done a hundred by now.
But I now want to measure a variable cap. to learn it's max and min values.
But not having any success on how to do that.
Anyone?
Joe WB9SBD
