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Just for fun, I fed my original post into ChatGPT to see if "she" had any insights, and here was "her" response.....a fun exercise.. "What you're describing is a fascinating experiment! It sounds

Are you having problems. If it works all right, why bother changing. Yes, new models sure look good. Like Pro model of https://www.tindie.com/products/hcxqsgroup/nanovna-v2-plus4/ But if it

Ali Express should be legit. But I have purchased a NanoVNA H4, TinySA and TinySA Ultra as well as many other products from R & L Electronics. They are legitimate and reliable and have great

Yeah, I've been thinking about that...although I will note that the laptop was NOT plugged into the AC adapter when I made the two measurements. What I'll try on my next visit will be to leave the

Try amazon AURSINC NanoVNA-F V2 Vector Network Analyzer 50KHz-3GHz Antenna Analyzer 4.3inch Screen ________________________________ Sent: Tuesday, March 18, 2025 3:23 AM To: [email protected]

Just joined and here goes my newbie message. Sorry. (1) I have an H4 from 2020 with the 0.5.0 FW version. I am guessing that an upgrade would be in order? (2) Also looking into an "F" and saw some

I would calibrate the NanoVNA again with binding posts. I would use something like 30MHz-100MHz, 900MHz is surely too much. (Like others have said.) When the Vna asks "open" I would leave the

That shows the parasitic coupling is different for each side of the bedroom HI And as left leg lenght is different of right one, if the left side of the bedroom is ??more?? parastic than the

Hello To perform this type of measurement, I use two BNC sockets bolted to a printed circuit board. I solder the components. This way, I can create a shunt or a series connection. I connect the SOL

Roger, The only thing I can think of right now, may be in relation with the fact even though I ordered my inductor / capacitor design kit for RF, the test frequency of the inductors is 100MHz. The

Roger, Thanks for the idea. I already tried sending them an email a while ago for that exact request ! The phone is still ringing, nobody answered yet at the other end ;( But I should throw the

The RF switch is damaged and can be restored by replacing the MXD8641.

Good point on the upper frequency limit of home brew (and some professional) fixtures. My home brew fixture which uses alligator clips instead of binding posts has an upper limit of 100 MHz. I

The inductance you measure at the operating frequency is the value that influences the circuit. Some people reserve the word inductance for the value an inductor exhibits at low frequencies where

I posted about my binding post and PCB OSL a few years ago. For best results you need to keep the slit in the middle as wide as possible and the same for all 3 boards. You also need to connect the

Something is wrong. NOTHING should show outside of the Smith Chart for S11, the green trace after a proper calibration is completed! While the following has been mentioned many times: 1) Did you

for just a few nanohenry you need to make your calibration very exact ... i would not try to exactly finetune it ... i would see if i am close .. then build my filter and tune the filter with all

you would need a choke below the transformer to decouple the shield of the coax being part of the antenna (and then it would still couple a bit to the antenna cause all couples with all in an indoor

Hello, new to this group. I've learned a lot from reading here, but i seem to have run into some issues and could use some advice. I'm building a low pass filter, and trying to learn to measure

The transformer does not decouple the nanovna and PC/laptop and, therefore, anything conductive within the house from the measurement. If you used only the NANOVNA connected to NOTHING, not even