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I might add that you need to remember, the Nanovna is an inexpensive hobby device and although it is quite accurate in many ways, it is not a lab grade device like R&S, Keysight, etc.?? There was

Stan, I was following John Gord's instructions as included in my previous email This procedure uses the stock transform mode of the nanovna firmware, it does not rely on any kind of special purpose

An LED wired to a JFET op amp based instrumentation amplifier with a diode detector should make a very satisfactory parasitic warning indicator. This first batch will be thoroughly tested before

I'll have to look over the W2AEW videos. Though I generally prefer something printed rather than listen to some long winded guy for 30 minutes only to realize he was never going to talk about what I

Christian, In the firmware (not necessarily the PC software), the "Low Pass Step" mode appears to give correct step reflection amplitudes when the selected format is "Real". I tend to treat the

Jerry, something is wrong here. The displayed values should show the one-way delay, and directly read the cable length if you set the velocity factor via the menu. How did you calibrate for this

Jim, I doubt it's peak. This is not your standard issue series diode feeding a cap. Read carefully my rant in post /g/nanovna-users/message/17636 along with the minor correction in

peak voltage, like any capacitor input filter.

Phil, When you are just starting out things can seem a bit overwhelming at first. There is no manual shipped with the product so you have to start hunting around. The Wiki for this group has a lot of

The post included below from John on the procedure for using stock nanovna-H firmware as a TDR is my gold standard, it answered almost all my questions. One point it does not explicitly state: The

Hello, please excuse if this has been discussed before ? perhaps I searched the list archive using the wrong keywords. Do you think that the time domain mode built into NanoVNA firmware (in my case:

I believe that the classic diode RF probe is finding an average voltage of the entire waveform after first shifting the waveform up such that the bottom tip pretty much sits on the ground reference.

One of the great things about the STM32 microcontrollers is that they have a bootloader (DFU) built into the chip. Unless you turn on the hardware protection bits of the microcontroller, which you

Oooh, that's a thought. If you use one of those newfangled nuvistors, you could fit the vacuum tube into the barrel of a squeaky pen. Though I doubt it would be any better than a tinySA for use above

If you go back a little further than 70 years, you may well find that as the recommended procedure in the ARRL Handbook. Jerry, KE7ER

Phil, If confused by all the choices, just stick with the stock firmware. It works fine, and gives plenty of features that could take months to explore. I have not found reason to update the firmware

How about a chunk of germanium from an old crystal set? - you could poke around on its surface for just the right spot...... ;-)

Tiny SA would work fine, except it maxes out at 900 MHz.. But the battery for the heater on the diode, and the B battery for the plate supply are expensive and heavy. So maybe a 70 year old handbook

This is very true. I forgot to say it, but before I connect the nanovna, I am actually biasing the Transistor with a relatively high Idq current with both input and output fixture ports either

The Smith chart is a good way to see the parameters.? The R and L (or C) are displayed at the top of the screen, as they exist at the frequency of the marker.? The chart displays impedance along the