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Hi Joe , you have to save 0 . When you turn on the nanovna , by default the register number 0 is recalled. Maurizio Iz1MDJ

I recently joined the club and bought a NanoVNA, which I think is a "classic" version clone (no case, no shielding). It is currently running NanoVNA-H firmware 0.4.5-1-efbbceca. My current goal is to

When you do a calibrate. Open Short Load, And then Save, I usually save 1 What is this saving actually doing? Can you retrieve this Save for future use? Speaking of a save. say you make changes to the

Interesting how a little DX35 with its small output tube would provide a similar set of L taps for the pi net as a pair of big bottle 3-500 Z's. Apparently the ratio of plate V to plate I and the fact

I took my old DX35 tank coil that has multiple taps and my Mosley traps and they pretty match your Now is values. Here is your now is: 10 = 1.1uH 15 = 1.8uH 20= 2.94uH 40= 6.46uH 80= 12.46uH Ps I used

You have to change the stimulus range I ended up for my coils 1-8 mhz then 10- 30 mhz an then a narrow span. Also I didn't recalibrate just to see what would happen. Down in the HF region results were

If you’re looking to refine your measurement repeatability, do a fresh recal, repeat the sweeps of both induntors under as near exact conditions possible, then recheck your cal to confirm

Joe, Once you have measured and installed the coil and capacitors in the RF Amplifier you can tweak the settings to compensate for stray capacitance and inductance by measuring the 50 ohm output

Well, I left the coils in place in the amp, BUT.... I lifted all the taps, so the coil is floating free but inside the amp. And all readings are normal now. Interesting. So OK we planned on leaving

The rotations on the Smith chart generally imply of resonance. The resonant frequency is where the trace crosses the real axis. It sounds like you may have moved the SRF inband. Don’t change your

Not identical coil. I needed slightly more "L" on every band. so I made the 10/15 meter coil slightly bigger. You see the coil. 3/16" tubing, 7 turns, 1.75 diameter 2.25 long. New coil, 3/16" tubing

Identical coil identical set up identical results. Not true? Something not identical. Check set up. At first blush it looks like you connected the coils in parallel. That would make the tests Not

Allow me to take a stab at this and try not to introduce too many new issues. 1) The 'phase' can be viewed as the 'delay' between the input signal and the output signal. When considering scattering

That reference (below) is excellent, and clarifies everything! Thanks, Roger.

Hello All, Need a question answered here. I am the one here making a new set of coils for a Heathkit SB-220. Using A NanoVNA-H4 I learned how to measure the old coil values. And what the stimulus

From the beginning: Many of the questions that appear in this forum regarding VNA operation suggest the fundamental premise of the VNA is either missing, misunderstood, assumed, or ignored. Questions

Andy, Here is a link to an excellent paper by Olivier Pilloud HB9CEM which describes the relationship between the reflection coefficient Gamma (Γ). complex impedance (R+jX), Return Loss and VSWR. He

Wonderful! Thanks, Jean-Roger

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Andy, Below is a copy /paste of my answer to another old thread. It could be of interest for your question 3. REAL and IMAG parameters are not the samething as RESISTANCE and REACTANCE parameters.