开云体育

When you use the edelay feature in a NanoVNA to move the reference plane from the SMA connector to a distant point you really need to have a short cable so the attenuation is minimal. This is not

These are very interesting points, thank you very much for that. I was questioning myself wondering if my technique was appropriate. Thanks again for confirming it can be improved. I will follow

I own an MFJ259, a RigExpert AA-55 and a NanoVNA H & H4. The MFJ is the poorest performer of the bunch and not really useful for measuring resistance or reactance to any degree of accuracy. The

Hi Jim MFJ company says that MFJ259 antenna analyser becomes inaccurate when measuring reactances below 7 Ohm or above 650 Ohm, i am really impressed with the good S21 responses you have even with

May be it's a new version in program, that you must enter the velocity factor as .66 and not in percent. Your measured data are ok, but the 2m RG174 has a loss of 2dB @ 900 Mhz. So the real mismatch

it?s close ... but you will get much better results if you use a short cable ... and calibrate at the end of that cable dg9bfc sigi Am 23.02.2025 um 04:46 schrieb Nico via groups.io:

Hi, Is my setup ok ? Is there any monstrous mistakes in my montage ? I'm quite new to the nanoVNA. Well, I am totally new on VNAs themselves. I did not know their exitance 2 months ago ! Well, I

Use S21 mode with an amplifier. People have been using VNAs as radars for years. The NanoVNA just makes it easier. Dealing with the big first reflection is tricky. One way is to use a separate

You have noted the shortcomings of* ANY* VNA, including those from the "big boys" at $$$$$. Nothing new, here. Yes, the VNA deals with impedances. Frequency analysis best be accomplished using a

Indeed, it is optimized for 50 ohms, but I don’t know that I’d say the precision loses much of its meaning as you get away from that. Can you quantify your assertion? Ultimately, the accuracy

I'm starting to think that adding the washers, (in other words increasing the space between the NanoVNA's front/top cover and the touchscreen just a teeny bit) solved the start-up problem as well,

Hi We have the impression that the NanoVNA is as an impedance meter, a Q-meter or a frequency analyzer, while it is only a transmission line network analyzer, that is to say we have to do with

Thanks for the reminder. Upgraded OK and working on an H4/MS. David -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email: davidtaylor@... BlueSky:

https://github.com/hugen79/NanoVNA-H/releases/tag/1.2.43

My version appears a bit different. 73 Jon, VU2JO [email protected]> wrote:

I have done a few surface mount repairs, and I have a tiny Oryx 6-watt iron and some tweezers :) But I can't locate the videos you refer to. I've tried searching on Youtube for every combination of

Fixed the jumpy menu (kinda). Put two 0.7mm/0.027in flat washers as thin spacers on rt. side on NanoVNA (see foto) to keep cover from pressing on touch screen.

Nizar, No I don’t believe Port Z function is in the latest version but check for yourself. https://github.com/DiSlord/NanoVNA-App

Hi Roger Need Please what is the latest version reference of Dislord modded NANoVNA-App windows program ? If It does have the Z-renormalized function ? Or Z0-renormalized function ?? H4 firmware

Normally this destroys some surface mount components. Unless you have experience replacing surface mount components a new unit is the best option. Also. There are several YouTube videos about this