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On 3/5/23 3:23 PM, Roger Need via groups.io wrote: > OneOfEleven developed the NanoVNA App for personal use and after moving on to other projects kindly posted it as open source for the community to

Wouldn't that come out in the calibration aga

Here is a 200 uH homemade plate choke. It was fine fro 160 meter - 40 meter where it was parallel resonate. Higher than that, no way. A significant number of resonate loops. Quite problematic. This

G'day Jim, You are quite right of course. When I wrote the reply to Don I had only just finished reading his referenced Keysight/Agilent/HP document. I meant to put in a comment that the document was

I'm getting emails from last week, just showing up today. How odd. Looking at the headers I got it at 19:31 (EST) today (= 0031Z, 10 March) Received: from noehlo.host ([10.149.109.189]) by

Here is a display for S11 from the vna. Sweep is 1 - 30 MHz, 512 points. A simple SOL cal and then a set of clip leads to the choke. Choke is standing up right on the tube chassis and the rack panel

I see W8JI has a link on his site for testing plate chokes, inductors and traps. Down the page he shows the VNA setup and SOL connections. https://www.w8ji.com/rf_plate_choke.htm Roger

Answer: it depends, but probably not reliably. Some stainless steels are magnetic and some are not; generally for example 300-series stainless steels are non-magnetic while 400-series are. Asking

no .... best is maybe in the nanovna bata tes group (displord modds faster as manufacturer can do a blink) you maybe will get a unit from the stock and so i is more or less sure that fw is old ....

Yea, there is a corrected version. I biffed it on the Smith Chart - BAD ENGINEER!!!! That's what I get for not proof reading..... Dave - W?LEV

*ERROR......ERROR.......SEE THE RED PARAGRAH* I didn't proof the write-up as I was becoming fatigued typing. Sorry guys and gals: Steve, I completely share our frustration! This is the primary reason

Dave (W0LEV), THANK YOU for sharing that! Also, thanks for sharing the attachments! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst.

Steve, I completely share our frustration! This is the primary reason I advise and avoid information by hams and other amateurs in the discipline presented on YouTuBe. Much of the information

While it is true, no calibration is required to see the resonate points of the plate choke. You will see in the log magnitude sweep the “dips” at particular frequencies. However, you have no

Actually looking for resonances on a plate choke doesn't even "require" calibration. Since you're only looking for the frequencies of resonances, no cal. is required. Treat it like you would a grid

I looked at W8JI's page on plate chokes..... and trying to figure out how he does the test cables and general setup for testing plate chokes...esp to arrive at RP values across 160-10m..and also Q,

What he said! Please. Regards, Kirk, NT0Z My book, "Stealth Amateur Radio," is now available from www.stealthamateur.com and on the Amazon Kindle (soon)

It would be a good practice that if you're using a long cable, the calibration frequency step size should be small enough that you don't get a phase wrap between steps. It's like FFT based TDR. That

I've been recently trying to piece together all the various conflicting information on balun and unun measurement with the NanoVNA. The problem is not a lack of tutorials, videos, instructions...it is

Why do you think that your new NanoVNA needs a firmware upgrade? If you purchase a known version, there should be no reason that a new device should immediately need a firmware upgrade. After you have