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Since I am on Windows Seven, I use nanovna-saver 0.3.8. My NanoVNA is DEEPELEC NanoVNA-F 4.3" HW2.3 HW3.1 Firmware 1.05 (Oct 31, 2022) I observe: 1/ To succeed, every time, the NanoVNA <-> PC

Check SI5351 generator I2C bus exchange

One problem with calculations at audio frequencies is that most transmission lines exhibit complex characteristic impedances below around 300 kHz or thereabouts. Telephone cable pairs, if untreated

You don't often see Smith charts at audio frequencies because transmission-line techniques are less common, as is complex impedance matching in general. No reason why they couldn't be supported, of

The major claim to fame of this type of antenna is not "gain" or "directivity", but coverage of all the amateur HF bands with one antenna with a single feedline. It is a compromise to accomplish that

Try 1.2.42 Installed today, works fine (exc. wonky conn. to touch screen), great instructions here: https://github.com/DiSlord/NanoVNA-D/blob/master/README.md -- I_B_Nbridgema

That's actually the main purpose of calibrating a VNA, to remove everything from the measurement except the DUT. 73, -de James/AC0CW [email protected]> wrote:

Oops! Those who might want it, get it while you can - or else you will have to ask the Wayback Machine. More and more creators of well-known software are retiring. Many of them go the extra mile when

Yes; in fact I had to do this to calibrate measurements made on a 1296 MHz bias tee using microstrip transmission lines. Zack

Yes. Instead of doing the OSL calibration at the unit, do the same at the end of the coaxial feedline. Outside of a bit of loss due to the coax, then your measurement plane will be at the end of the

Is it a viable method to do calibration of the VNA with a transmission line attached, so that when the DUT is attached to end of that line the measurements are true measurements of just the DUT?

All of the suggestions that have been mentioned will probably work to lower the SWR - but will it make any real difference in your radiation? Probably not. In short runs of decent coax, any loss

Indeed but modeling multiband antennas with traps and internal components with multiple coupling mechanisms can be full of interesting challenges? ?Sent via the Samsung Galaxy S24, an AT&T 5G

Mike M really interesting fixture it looks really good. I'll probably try to make it with our european version of the electric connector (wago, it looks the same). William I took a look at the book

A co-linear vertical dipole design. Using coax as the elements to linearly load the element. Fed like a dipole in the middle instead of an end fed like most vertical antennas. Sure you can put that

Why not contact the manufacturer and ask? https://gapantenna.com/shop/titan-dx/

Modeling wont work. This antenna uses multi coax sections folded and placed inside the tube, with the feed point at the mid point, and section dropping below the tube with the coax connector. So far I

Yes, two parallel connected 1/4 electrical wavelengths of 75-ohm cable will map 25-ohms to 50-ohms. That's the easiest solution. I don't know of any single reference for using coaxial matching

Dave, Frank; Wow! Thank you for the detailed suggestions. Question: How would tuned stubs accommodate multiple bands? 40m (1/2 wave nom 66ft)/20m (nom full wave), maybe even 15m (nom 3/4

This isn't something the NanoVNA can measure. Any free antenna modelling software can tell you though. Just download a flavor and enter all the antenna specifications it asks for. It'll tell you what