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QUOTE: 1) What is the persistence of calibration done through nanovna-saver? I.e., does it persist if the USB cord is disconnected and the H4 is taken for mobile measurements? Any cal done within

#2 is correct. The calibration done in nanovna-saver is solely in the computer. It can't be saved to a slot in the nanovna, partly because -saver has more sweep-point options. You need to do the

I use nanovna-saver with my H4 because it aggregates several useful functions for operating, storing, printing, and exporting measurements. I am confused about the calibration done from

Surprised you said that. Only takes about 2 minutes for the whole procedure. And if you don't care about S21 measurements you can skip the last two steps and only do SOL (short-open-load) Roger

If you use SAVER on a PC or laptop, you can store your verious cals on those and access them later for use. Calibrate once for each frequency range and setup.....store on a "big" PC........recall for

New here. Any tricks to make calibration easier? It is a real hassle as it is.

Re: rain gutter antenna I also have one rain gutter antenna it's about 50 ft long and 8 ft above ground level. For one 40-meter freq i use a 1:1 balun (indoor 10-meter-long radial) plus a matching

Out of a major forest fire, insurance put us up in a large apartment complex for 2 years. I chose the 3d floor - the top - for RF reasons. Of course, the apartment complex came with its manditory

* * *How good can a RAIN GUTTER be on HF bands?* * * *Since moving to a "retirement community" last year I have been searching for a reasonably good HF antenna.* *I have tried a few 10-20 ft

Clyde, in HTs used for their purpose, which is portable communications, the body of the HT, and even the body of the operator are all part of the antenna. If you mount a rubber duckie directly on a

This can be improved by adding a small Common Mode Choke at the VNA end to help isolate the coax from the case of the device. The frequency being measured also has an impact. *Clyde K.

Yes, I have noted that the SWR changes when holding the VNA vs. not holding it, and touching the SMA connector vs. not touching it. The readings generally are better when touching vs. not

Ken, the behavior of rubber duckies depends significantly on the radio they are attached to. So, to get reasonably accurate results when measuring them with the nanoVNA, I suggest that you build a

make the swr trace active and then press on calib (without recalibrating) and then save to slot 0 (default slot on boot up) ... i do the same if i want other settings to be saved (be it avg setting or

QUOTE: Be sure to calibrate to the end of the coax at the antenna. Coax will influence the measurements, especially if it is longer than a wavelength. (unless is is electrically an odd multiple of a

Thanks to all for the advice. I have a whole load of rubber duck antennas that I'm checking so see at what range they should work best.? Some of them I don't even know what band they're supposed to

With the second range within the first range, the nanovna does an excellent job of interpolating between the calibration points, and you will get good readings, especially for general tasks like

I myself wouldn't be sure of the results. I would re-calibrate it for 144-148 MHz. Then store in a different memory slot than the one I stored 144-174 MHz in. It only takes a few minutes to calibrate

I would re-calibrate when I change to 144-148 MHz. That way I'd be sure. I'd probably save that in a different memory slot than the 144-174 MHz. Zack

As the second range is well within the first range, you may be able to get away with it, though the ideal way is as Dave has mentioned. 73 Jon, VU2JO gmail.com@groups.io> wrote: