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If you don't ask, you won't find out they say. So here goes, could capacitor Q be measured using the S21 method? Richard, K8CYK [email protected]> wrote:

I tried to repeat Roger's test of a 'Hi Q' 470pF cap with my nanoVNA and managed to see an indicated Q that was very noisy (as expected) below 10MHz. At 10MHz it was probably averaging a indicated Q

Thanks for the update. I appreciate the effort. Looking at the notes you have a fix in the H4 version "-For H4 now allow 7 save slots H - fix tupo on average (now noise floor more better)" Do you

If the transmission line leading to the load and the load are good 50Ohms the length of the line is irrelevant.

It would be interesting to see what type of 470pF cap Roger was testing. The plot shows a Q that collapses to 200 by 1.3MHz. I'd expect the nanoVNA to be able to indicate a much higher Q than 200 at

Hello Carl, I have also some documentation around the RF Demo Kit board: /g/nanovna-users/wiki/16592 73, Rudi DL5FA

Look for the Boonton 34A resonant line coupler. A reasonable approach of course is build your own. A target unloaded Q that would be of value is 500 to a 1000 at some target freq... say 400 MHz. Fun!

Quite some time ago I was qualifying ceramic caps for high power PA designs. The vna measurement just can't quite make it. The approach that did work and correlated well with practice in design was to

I think it's a bit optimistic to hope that a VNA could measure that component with a basic s11 measurement. I did a few quick sums and at 100kHz, a 485pF capacitor with ESR 0.58R, -3282R reactance, (Q

In another topic the limitations of the NanoVNA when measuring the Q of inductors and capacitors was discussed by Manfred Mornhinweg. /g/nanovna-users/message/21404 This has been my

Thank you for pointing out the other thread. I haven't seen it yet. I agree that the board on the left has a better layout - all three standards are in the same position. I have the variant of the

I think found problem (it exist on H version only) Try last loaded firmware version v1.0.50 /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware

No it does not work with the NanoVNA-F. The firmware in the -F does not have the "new " data transfer protocol. Roger

Hi Manfred, I'll add the GR 1606A to WB2UAQ's list -- Dick Benson, W1QG, who wrote the MATLAB app mentioned in my previous post, has used his to measure capacitance Q in the thousands range (e.g.

Only thing possibly missing is the Smith Chart. Looks good to me as well. Have a look through the Wiki for starters. Dave - W?LEV wrote: -- *Dave - W?LEV* *Just Let Darwin Work*

By any chance does it work with the NanoVna-F. When I start my NanoVna-F it does detect the device version 0.2.1 but the seems to time out. NanoVNA app version is 1-1-1-193. Mike N2MS

I had a play yesterday with the newer firmware versions and the 111 VNA App. Overall I wasn't that impressed and went back to my own PC tools and the earlier firmware. With my PC tools I can correct

Hi, Very useful discussions around this demo kit. I was trying to do the measurements on it but I realized that the OPEN structure nr 14 was causing me large problems. After calibration it did not

Hello Toma? Roger Need has made a comparion of two different RF Demo kit PCB's. See: /g/nanovna-users/message/20702 and the attached photo: RD-Demo-Kit_PCB_comparison.png How about

I may be wrong, but for NanoVNA-H and H4 the requirement is Virtual COM Port Driver. https://www.st.com/en/development-tools/stsw-stm32102.html Martin 9A2JK