I took a 1/2 wave vertical (17 ft tall) made from telescoping aluminum tubing and shortened it to 13 ft to try it on the 18.1 MHz (17m) band. Took out the impedance matching circuit and just hooked up the center of coax to the antenna, braid to two or three radials. Easy to tune up with a few radials. Worked stations all over the world with FT8 Here is the Nano VNA trace of both SWR and RETURN LOSS (dB) de k3eui barry philly region

I've had my nanovmna for quite a while now...I was immediately struck with how fragile it looks with it's SMA connectors soldered directly to the PCB, a very light weight multi function switch and an open body just inviting things in to cause havoc. The pictures attached show my attempt at making it field proof. I also added a bigger battery. I use the nanovna mostly for checking SWR, resonating traps etc and find the set up of the correct functions a bit lengthy and tedious only to lose them all when I switched off the nano. I thought I'd try to save the following, SWR, centre 14Mhz span 2MHz, sure enough I could recall these settings, buoyed by this I filled the remaining memory slots with all the bands up to 28MHz... all successful. What really surprised me was that when the nano was turned off and then back on again it automatically entered memory 0 and was able to display SWR on 14MHz, and just a simple matter to select the other memories for the other HF bands....90% of what I use my nano for. You may say RTFM...well as there is no M to FR...it was down to me discovering this on my own! 73 Steve G4EDG

hi,I'm new here so hope I can put the question right, I have a NanoVNA-H4 v4.2 I did the RTC installed the 32.768khz xtl everything works fine it has DiSlord's latest I want to know which board is I haven't see these around

Sorry to insert this in this email site but I have to begin somewhere. I built this rf output detector years ago as part of a kit rig I bought but don’t have any written info on it. It is quite different from the single diode detectors all the other QRP Kit providers describe. Anyone recognize it? Looking for the math formula for rf output using two diodes, one on each side of the sine wave if I have it correct. Be the REASON someone smiles today. Dave K8WPE Be the REASON someone smiles today. Dave K8WPE

Okay, I give up. Under the Display/Format menu is "Phase". In ham radio, what would be a practical use for this function? Thank you...

Has anyone fond the ultimate H4 container wherein you could store cables and test items? I very much like what I have for my tinySA Ultra but I simply store my H4 in its original box. I do not have a 3D printer (as of yet). A soft (foam?) interior would be nice. Tanks, larry

I am looking for an effective Comparison between the various models, and another for the versions of firmware. Differences, and advantages etc. I have read, but not tested that firmware can be applied as desired without consequence. I have not tried to apply same firmware from the F series to the H or reverse. My employer has the DG8SAQ VNA 3, NANO F, NANO F2, and NANO H4. We use then for testing on Antenna and Cables. However it is clear that the 3 nano devices are not the same and cannot be identically calibrated. I wont even mention the DS8SAQ as it's a whole other breed. What I do know is the H4 has two clock chips, an entirely different way to report or calibrate output power and is activated slightly different, its in a plastic shell (no shield) and the biggest issue for us is that that we cannot track multiple points at the same time. (Ohh sure you can have 4 active Markers, but only one specific data point (trace). ) We learned all this only after the purchase and could not line up results. This actually lead to arguments and finger pointing. Since it was generally assumed one of us had no idea what they were doing and thus everything done until that point was now in question. With the firmware on the F series, I can activate 4 Markers each showing specifics of their frequency relative to the Trace active. However, 4 traces can be on screen too. I know the traces are all reactive to the active Marker. We we use a frequency sweep so the center band is usually the setting for Marker 2, and it is the active marker. Traces are configured to Log, Smith, SWR, and Phase. With SWR active, so the 4 markers will each show Smith and SWR values. At this time we only use S11 functions. I have personally assembled a basic quick start guide for my coworkers, to use on the F and F2 models. I have assembled one for the H4, but for the most part, it sits in it's box since it's results never line up. So there are likely important details I might add to that guide I am currently unaware. I have attached sample Screen shots of how we configure the F series. Oddly I don't seem to have any of the H4, and I am not sure why.

I would like to know if what is written in the attached diagram is correct or not. Gain = Vs/E S21 = Vs/Ve -- F1AMM François

Hello Guys I have admired NanoVN's design from the very beginning and found it to be a beautiful platform to learn about radio related measurements (and dsp of course). Currently I analyze the code that performs signal analysis (dsp.c). Could anyone of you explain why the values in the dsp_process function are divided by 16 (what is purpose of this) and how to treat the values calculated by calculate_gamma function. I will be grateful for any explanations.

Hello I have the .s1p file [S11 f (F)] of an impedance [z=f(F)]. I connect a quadrupole that I measured as a DUT and of which I saved the .s2p file [S11 f (F); S21 f(F)]. Is it possible to * calculate * the .s1p file of the impedance brought back to the right? -- F1AMM François