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I recently joined the club and bought a NanoVNA, which I think is a "classic" version clone (no case, no shielding). It is currently running NanoVNA-H firmware 0.4.5-1-efbbceca. My current goal is to measure crystal parameters for building crystal filters.

For NanoVNA-V2, there is a special "ojisan" firmware that has easy-to-use menu options for measuring crystal parameters; see , section "LC, Crystal series resonant measurement". Through a series of measurements, the firmware then computes and displays the crystal parameters as shown in the below sample:

Fs= 7.997345 MHz
Fp= 8.0130 MHz
Ls= 13.5 mH
Cs= 29.3 fF
Cp= 7.47 pF
Rs= 17.5 Ω
Q= 38791

Unfortunately, this firmware does not work on my classic NanoVNA.

Is there a similar firmware for the classic NanoVNA or NanoVNA-H that allows easy measurement of crystal parameters?

I add this feature for all H/H4/V2/V2Plus in my last v1.0.69
See Marker->Measure menu

Unpack and use firmware for your device variant
/g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware/NanoVNA%20v1.0.69%20fw%20pack.zip

On Sun, Sep 12, 2021 at 08:19 AM, Qrp Gaijin wrote:

I recently joined the club and bought a NanoVNA, which I think is a "classic"
version clone (no case, no shielding). It is currently running NanoVNA-H
firmware 0.4.5-1-efbbceca. My current goal is to measure crystal parameters
for building crystal filters.

I think you will find this video by W2AEW on measuring crystals with a NanoVNA interesting. His videos are technically accurate, easy to follow and quite informative. He uses an earlier version of DiSlord firmware and compares several methods of measurement.



Roger

Which variant (if any) works with the Classic (Pre-H) VNA. This never seems completely clear from the descriptions - I think because there's no consistent way to describe the original unit.

thanks,

M

Mario,
The 'classic' includes all NanoVNA models from the very 1st model (and clone) up to and including the H (but not the H4).
I'm running the latest 1.0.69 on my classic with no issues.

Confirming that "-H" variant works on the "Classic" NanoVNA. Just updated it after reading this thread.
Compared with crystal measurements done on SAA-v2 with OjisanKobou FW. There is a little bit of difference, around 100Hz for the series resonance. Most likely because I didn't calibrate the TCXO frequency on either unit. Lm and Cf are very close.

73, Mike AF7KR

Thanks to all!

Thanks, I've updated mine and it works great as well!

M