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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

Other sources that are in other countries than Bosnia Hertzegovina https://doi.org/10.7251/ELS1418029S https://doaj.org/article/f97e342395e443358e02546e68ea0fb9 The authors have a number of other

The SWR for a 50 Ohm cable will depend on the feedpoint impedance at the end of the cable. The impedance will depend on the antenna dimensions, its height, and its proximity to the environment. If the

You need to calibrate your coax SOL at the far end, so your readings look like your antenna is at the vna and not some distance away.9 [email protected]> wrote:

Maynard and others: You and we were most fortunate to be initiated with one of the most robust sunspot cycles of modern times in 1957!! Same story at pre-Nano VNA KN1CJO in southern Maine. Worked

I got my Novice license in 1957 and used a single wire routed out the window and up to the brick chimney and then across the yard about 100 feet to a pole. It worked fine, with my best DX using a