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I id cores by first measuring their physical dimensions. I then measure the inductance at low frequency (even as low as kHz) and calculate the inductance index, AsubL. With these two parameters I have

Just curious, do the types you refer to here mean any specific manufacturer? Or are the same type numbers used by more than one? I have started to collect some mfr. data but haven't gotten very far

Hi Graeme, These plots as you stated represent the inductance and loss terms for the ferrite material. Dependent on the construct for the sample to be tested, the leakage inductance can vary and hence

I'll test it right now !! Thank you!

When you save the screen shot keep your finger on the screen until it tells you all is OK. That way you know it's saved.

Vy Thanks Holger and Gyula !!! I try... Vy 73 Enrique LU8EFF -----Mensaje original----- De: [email protected] [mailto:[email protected]] En nombre de Gyula Molnar Enviado el: martes, 14 de

Have fixed the SD card routines now Igor.

You can change your email preferences for the nanovna-users group by logging into the nanovna-users group and going to your account preferences web page. DaveD

I upload my firmware to file section /g/nanovna-users/files/Dislord%27s%20Nanovna%20-H%20Firmware

I am new to using Python, but I have it installed On Windows 10. What is the command syntax to compile the new build? Gary

Take the link to the Wiki. Then click Subscription in the Left Column. You have the choice to set your preferences. 73 KE0ZUW

Hi, Can I receive emails like a digest just once a week please? I am snowed under by the emails I am getting. Thanks Ken Walker

yes, AND in Makefile uncomment the line with UDEFS.. #Enable if install external 32.768kHz clock quartz on PC14 and PC15 pins on STM32 CPU #UDEFS+= -DVNA_USE_LSE

Sorry for the dumb question, but if I want to build the latest firmware for the H4 with RTC & SD Card, I need to uncomment the #defines on lines 25 & 27 of nanovna.h and then run make? Thanks, Brian

Graeme, I've had the identical experience, even using the HP 8753C VNA calibrated properly. I don't get it, either. Dave - W?LEV

ps.: /g/nanovna-users/attachment/10650/0/Installing%20Python%20on%20Windows7-32%20for%20nanoVNA-Saver.pdf -- *** If you are not part of the solution, then you are the problem. (

I confirm that 0.36 works under Python 3.7.4 installed on windows 32 bit. You need to install Python and the required modules in advance. See the required modules in the NanoVNA Saver .zip /

What a cop-out! How about instead of "taking you ball and going home " DO SOMETHING constructive , even NON TECHNICAL for amateur radio? Amateur radio operators are known for rag chewing - also know

You can stll try to install from source. First you need python from the microsoft-store. Then clone the git (or download as zip). In the source directory running following in the commands in the

Hi, Like the others have written, its the measured phase of the S21 measurement, and as nothing is connected between ch0 and ch1 you only see the noise in the ch1 receiver. It also looks like you