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Even a linear wire, not coiled, has some measurable inductance. At zero length the display on the Smith chart, will show a single value of zero at the extreme left of the real axis. That point on

You can absolutely trust Alan Wolke W2AEW's videos. He is a Tektronix Field Engineer, I know him personally and knows his stuff 100%. https://www.youtube.com/results?search_query=w2aew+nanoVNA And,

Dave, One doubt about the Smith Chart: Why does the so-called resistive component change as you move across the tracing? If it was the true electrical resistance due to the ohmic resistance of the

That being said, the aim of a radio amateur is to have a QSO, without damaging equipment and causing interference (RFI)! All these - balun, common mode choke, SWR meter and NanoVNA, are aids

Possibly the attachment will help. Dave - W?LEV [email protected]> wrote:

Beware of most YouToob presentations. Those by the "big boys" which offer their instruments for lots of $$$$ are good and solid. Many of those by amateurs or "self proclaimed experts" are flawed.

QUOTE: However a successful QSO is not scientific evidence of a "good" or "bad" antenna. If it works, great. But do not use this as evidence of optimum antenna performance:-) ** I'd also

All info here is accurate. BUT, to save time, calculate the "electrical" wavelength needed mathematically for the "rough" estimate. Wavelength = 300/frequency (MHz) multiplied by the specified

When I started in ham radio, 46 years ago, indeed almost nobody used baluns with dipole antennas. Nowadays instead it's very common to use them, and there are at least two good reasons for this

Thanks a lot Inviato da iPad

If the video on Youtube notes that the impedance should be zero, it is incorrect. The THRU impedance should be 50 ohms. I just checked on three NanoVNA's, and they all measure 50 ohms. Zack

Grazie Inviato da iPhone

Hi, I have seen a video on Youtube… NANOVNA analizzatore di antenne: come usarlo ( https://youtu.be/iTzKgFMUoJc ) youtu.be ( https://youtu.be/iTzKgFMUoJc ) ( https://youtu.be/iTzKgFMUoJc ) Inviato

Per avere il valore zero sul diagramma di Smith (puntatore alla estrema sinistra) devi mettere il connettore SHORT. [email protected]> ha scritto:

Port 2 is 50Ω as it should be, why do you imagine that it would be 0? [email protected]> wrote:

I buyed a nanovna H 3.6. When I try to calibrate it, after the full procedure, if I set a Smith diagram and I connect THRU the two ports using the supplied cable the value is 50 ohm instead of 0. I

Hello Jon, As you wish to use the antenna on the higher harmonics as well as 2M, I would suggest you use ferrites to create a Common Mode Choke (CMC) as noted by Roger. I suspect (but do not know, I

Yes,a dipole will work without a balun. But it is not a dipole anymore. The outer surface of your coax shield becomes part of the antenna system. This can give inaccurate results with the VNA. In

Your first link redirects to the same url the OP posted but I got to ask: What is your issue with the paper being hosted in Bosnia&Hertzegovina, the paper originated there. [email protected]>

I suspected the 50 Ohm calibration resistor and ordered two new ones. After recalibration and measurement, the SWR is 1.26 at 172 MHz and 1.65 at 522 MHz. Both measurements with SOL calibrated