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Have you the DFU mode driver installed? The normal series port emulator is? used by the Windows programs that communicates the nanoVNA with the PC, such as nanoVNA sarver, but for updating the

I agree...? I'm just saying my calculator says the original circuit is closer... If I was to change anything I'd swap the 11-ohm resistor with an 8.97-ohm 1% and I'd have a 49.998 impedance... ? 73

4.2.1 is better because the input impedance of the SA602 (1.5kOhm//3pF per input) has less impact compared to 4.2 -- NanoVNA Wiki: /g/nanovna-users/wiki/home NanoVNA Files:

These calculated values are correct if, and only if, the actual resistor values are exactly as marked which they will not be. 73 John M0JBA

That's not what my calculator says... 4.2 circuit:91 ohms in parallel with 51+11+51 take 1/91 + 1/113 = 1/x and that comes to 50.4068 ohms... When I do that to circuit 4.2.1 I come up with 50.64

It's just 1/x but flipped and shifted ;)

"Smith Chart : In this computer era, this extremely high-effort demanding, highly-inaccurate, old-time graphics tool became completely obsolete, because it is a totally useless one in every other

Oooh, si tacuisses ! You try to make believe to be way above it, but: Is that "innocent, unexperienced beginner" perhaps your own point of view? This computer era definitely did not come into

What operating system? WIN10 (and WIN7) protects some folders against modifications. Create a di

H4 F303 variant PCB artwork updated to 4.2.1 : Update the schematic diagram, the impedance of ch1 is closer to pure 50 ohms

For people actually designing RF equipment, the Smith Chart is a valuable tool. -- Carey Fisher careyfisher@...

I received a NanoVNA-H, firmware version 0.4.5-1-gfbbceca, Build Time: Dec 26 2019 - 19:32:31 today. Finding that there is new firmware, I read the WIKI and downloaded STSW_STM32080 from the ST

Hi Kell, The unit you purchased is the latest version of the 2.8 inch Nanovna. The H4 version has the same RF and operating system design but with a 4inch display and a uP with larger flash memory for

Wish I would have subscribed to this nanovna@... site before buying. Live and learn. I just ordered and received today a 【Upgraded】AURSINC Vector Network Analyzer 10KHz -1.5GHz HF VHF UHF

I also just received notice from USPS that the S-A-A 2 is in transit. With any luck I should receive it within a few days. I placed my order on the 8th of March, so given the current state of affairs

On Wed, Mar 25, 2020 at 02:22 PM, Rune Broberg wrote: Hi all, An S-A-A 2 device is on its way to me, and I will update nanovna-saver as soon as possible when I get it. I am sorry for having taken so

The Smith chart assumes that the impedances have been "normalized". Just divide by 50 to get one in the center Bob [email protected]> wrote:

Thanks for the reference. Not bad first response, appreciate that very much. Cannot say much about the rest of them. In future I will limit my posts to "how much is 1 and 1 " , asking to avoid sermons

Hi all, An S-A-A 2 device is on its way to me, and I will update nanovna-saver as soon as possible when I get it. I am sorry for having taken so long to get a new version up, but real life has

Thank you for the suggestion, from which I see now that I have to correct what I wrote, as follows : for the newcomer, the whole Great Idea of that very difficult to learn Smith Chart is just of