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Hello John, I have made a web page with a English translation of the ojisan web page, see: https://www.rudiswiki.de/wiki9/nanoVNA-V2-ojisanFirmware I have also compiled a version to allowv a screensho

The Ojisan firmware for the V2 allows re-normalization of the Smith chart, Return Loss, and VSWR to arbitrary real reference impedances. The calibration is still done with a 50 ohm load, but the

You would need a 75 ohm terminator at the input of the VNA. John

The current NanoVNA-F, NanoVNA-H and NanoVNA-H4 firmware do not have this feature in the menu. I don't own any V2 products so I can't comment on them. Roger

drkirkby@...> wrote: I think I could have made myself clearer. The VNA is designed to measure impeda

If you are only interested in measuring the impedance of the antenna, then just use the 50 ohm cal kit on the end of the 50 ohm coax. The cal kit will remove the effects of the cable. Just be aware

Calibrating a NanoVNA using a 75 ohm load instead of 50 ohms does NOT make the NanoVNA into a 75 ohm test instrument. Some VNA do allow you to set the system impedance to other than 50 ohms. The

Gert, I have to correct a misconception there. Half turns, or quarter turns, do not exist! Two-hole cores do NOT allow making half turns. At least not in the magnetic sense. Two-hole cores behave very

Hi Barry, This was really amazing, thank you so much for putting it together. I've been going through while waiting for my -F to get here from China and it's been really helpful. The "grampy pushing

Barry, Can't thank you enough. You did an excellent job putting this together.... finally, something I can understand. 73 Gerry N0DOZ in AZ

Good information in this thread.? But you might want to think about how badly you want to correct the SWR of 1.5 introduced by the 75 ohm line.? You can calculate the improvement you can achieve,

Maybe of interest: https://www.kn5l.net/kn5lEfhwUnun/

Hi Brian . have a look in the FILES section , /g/nanovna-users/files/Absolute%20Beginner%20Guide%20to%20The%20NanoVNA Jon - g0myw

There's a helpful presentation here: /g/nanovna-users/message/22977 73, David GM8ARV -- SatSignal Software - Quality software for you Web: https://www.satsignal.eu Email:

Brent.. I cant find a beginners guide on how to use the vna for ham radio here .. Can you assist me on where i can find it .. Thanks , Brian

See more info on the 50/75 transformer on the site of my friend ON6GD https://www.xtgaby.com/post/50-to-75-ohm-transformer-for-receiving-systems

I take it back... Nothing magic about bifilar. Best is a soldered tap to the desired wire. Next best is a twisted wire loop tap. Third best is bifilar and worst is two separate windings. This assumes

Hi Fred, I appreciate the feedback. I will eventually post a link on some other forums. I don't happen to have any mix 52 in my collection or I would have tested it. Looking at its complex

JMR, Indeed I was using the two port S11, S21 provided by the nanoVNA. If you go through the Appendix in my post you can see how I generated the loss plots I presented. Once I established a calibrated

Pete, I've modeled with 4NEC2 an end-fed wire with various source impedances and counterpoise lengths. The 2450 ohm source impedance seems close to optimum. You have to choose some step-up ratio. Once