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Go to the Nano VNA Wikki, there you will find all the buying info you need, but hurry, as of Feb 4 goods made in China are going to cost you a minimum of 10% more. [email protected]> wrote:

I bought my H4 and TinySA Ultra from R&L after many recommendations from here.

My NanoVNA H4 is not operating properly, I'm about to buy a new one. Is R&L the place to get a real model? Mikek

With the ADC detection button, you can set multiple shortcut keys, such as entering DFU mode, taking screenshots, pausing scanning, and so on. Because of these menus, I need to click several times to

I recommend to you to use the resonance method, it’s more accurate. You are using a very simple VNA and there are errors of measurement bigger than the magnitude or real part of Z. I posted a method

Hi All, For those who have the excellent book 'Experimental Methods in RF Design' (Wes Hayward W7ZO! et al.) look at the following section. 7.9 Q measurement of LC resonators. The test jig described

I have the F V2 and it is everything a person could ask for except the inclusion of and SD Card and lacking of Dynamic Range for filter measurement. For working with antennas is simple and allows a

Hi All excuse me , i just doing the calibration again at the same time of the two different stimulus span , and remeasure the same inductor , and i have the same value of resistor loss , so the issue

Hi Thanks Roger and all contributers for their interesting comments , i am agree of almost all , it is true that making measurements of the low resistances of the inductances with the 50 Ohm divider

Thank's for all replies. 73 Math/PA3GDS

Yes, I am going to lock this thread since it is far off topic. I think we've discussed this matter sufficiently. DaveD, co-owner KC0WJN [email protected]> wrote:

Thank you Steve! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources

Edit...I did the same

Thanks Steve!

I have, reluctantly, muted this group for the time being. Discussion about the morality or legality of absconding someone else's work are not why I joined.

Try removing and re-seating the display cable. Mine showed a white screen (gave me a mini heart attack) but re-seating the cable restored normal operation. Best regards, Don Brant

OK, glad that's cleared up. I thought I must have done something really wrong to get 4 times the value you reported. I hope Nizar got his answer. I think the best one was provided by Jim Lux. It

Brian, You are indeed correct. The Q calculation is wrong. I ran the simulation at https://miguelvaca.github.io/vk3cpu/toroid.html I will let the author know... Roger Roger

Roger, I think there is something wrong with your Q calculation. Using your X and R, Q = 17.1 / 0.0935 = 183, close to what I measure, although I measure a higher inductance. Brian

There can be some variation in production batches. Amidon does not make their own cores - they buy them from suppliers like Micrometals and Fair_rite. The wire diameter and how you wind can affect