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I hope this is not a silly question, but where do you need GDO, if you have a VNA? That is, you can measure coils and capacitors with VNA. Measuring resonance frequency is bit harder, because Q gets

Hi Bob If you look at /g/nanovna-users/message/33324 you will see a picture of a pickup coil I made. It's 5 turns of 0.9mm enamelled copper wire on a 20mm diameter PVC former. This

Telecommunications engineers who work with transmission lines (telephone cable pairs) that exhibit complex characteristic impedances (Zo) generally use return loss and reflection loss to characterize

There have been references to pickup coils to use the Nanovna as a GDO. Since I have zero experience with a GDO and have a need to measure some inductors, could someone provide some specifics on

Using a smith chart VNA with a manual antenna will be an eye opening experience. You will never want to go back to the hunt and peck method of the three controls. Lester B Veenstra K1YCM M?YCM W8YCM

Steven, [Transceiver], [Tuner], [Antenna] = [Nano], [Tuner], [Antenna] Set up if you wish to use your tuner to "adjust" your antenna resonant point with your Nano. David Reed, ac0yw

Hello all, I would like to connect my NanoVNA, antenna and manual tuner (MFJ-969). I can connect the nano and antenna but am not sure how to bring in the tuner. An example of what I am trying to do

I moved the coil away until the frequency of the dip remained steady then moved a bit further. The vertical scale is 0.01dB/div so the dip is perhaps not as large as it seems. -- Mike?

Pedro, You write "I have a nanoVNA S-A-A-2 which is useless because it doesn't measure Rs orXs independently in S21 mode, only measures impedance complex." Recent firmwares from DisLord provide what

Looking better but you still have a large dip. Keep moving further apart until you can barely see it and record the dip frequency as you go. Roger

I'd think somewhere between 18.082620 and 18.085096, because that's where the imaginary part goes through zero.

Roger I made a new sending coil and it works a lot better now. -- Mike

Roger always has good ideas. Attached is the measurement (via nanovna-saver) of a trape and I will then explain to you how the measurement is made. When I read S11 Return loss I say it resonates at

Mike, You are way too close to the coil being tested. The inductance of your coil is affected by the proximity of another coil and this affects the SRF measurement. Once you have a dip on the NanoVNA

Nanovna-F has 4.3 inch IPS screen and is much more readable outdoors. -- Doug, K8RFT

Isn't complex impedance Rs + Xs j? But you said S21, which is also complex (although often displayed as magnitude and phase). But convertible to equivalent series R and X, with some math. There's been

Hello to all, Thanks for all your inputs, I made a few searches and I saw the devices you told. Actually, I just need to work up to 150MHz, I build solid state amplifiers and I need to tune the low

I recently bought the SeeSii nanoVNA-H4 which has a 4" screen. I love the larger screen. It is useful up to 1.5 GHz, but my use for HF radio is just 3 to 30 MHz, plus VHF and UHF, so this is fine for

Thanks Fran?ois for the response and taking the time. I wanted to put another plot on here, this is with another NanoVNAH4 I have and the outlier is in the middle of the sweep at ~130MHz. The

Nice job Ignacio. How many turns on your pickup coil? I had to wind my pickup coil around the end of the inductor to get enough coupling for a response. The dip is fairly close to the SRF estimated by