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Dave, what do you mean by dynamic range in this context? Brian

You've all seen my fixture I use for evaluating transmission measurements on various items, especially common mode chokes, filters, and other circuits. Well, that old fixture was limited to about 35

Yes. My last visit to JB was just after they closed. Sitting on the concrete table outside the store was a Tektronix 7623A, with a sign on it that read "FREE". You can guess what happened next. JB was

Dave, we all miss J. B. !! I can't count the number of times we, collectively, solved (unpaid consulting) design problem with unknown designers in the isles of J. B. Saunders. And......, then found

And J. B. Saunders .... DaveD KC0WJN [email protected]> wrote:

Yes, when we can't find something at Ace, we head to Boulder. White Rock, New Mexico also had something similar that "served" the lab at Los Alamos. Good hardware stores are rare these days with all

And Yardley Beers, W0JF, a Boulder legend along with McGukins. Ed McCann AG6CX

I severely miss McGuckins. DaveD -- This email has been checked for viruses by Avast antivirus software. www.avast.com

Deepelec has not updated their firmware in several years and their architecture is not the same as your V3. Why not open the case and disable the beeper? Put some tape across the output port or cut

Any good hardware store may have them. Also a good electrical supply house. Likely, the chains will not have such items. We have an excellent "have everything" and then some hardware store in Boulder.

Nizar, Yes you need to use Enhanced response option for S21. It was created by DiSlord for these types of measurements.

Makis is a great guy, I have designed one of his products, a dual log detector board, https://www.sv1afn.com/en/rf-power-detector-meter/adl5519-rf-power-detector.html, into a VSWR protection circuit,

This might help: https://stackoverflow.com/questions/41328451/ssl-module-in-python-is-not-available-when-installing-package-with-pip3

Hi Roger I do not use enhanced response, indeed i dont use an unknownen function for me, i use SeeSi H4 SM NanoVNA + DiSlord 1.2.40 Firmware , Serial resistor with reasonnable 2cm legs only for 30Mhz

Hi folks, I'm brand new here. I just got the NanoVNA-F V3 which is made by SysJoint. Like with my other VNAs (a cheap small NanoVNA-H & a LiteVNA 64) the first thing I looked for was the (custom)

I nearly fell out of my chair when I saw the HP fixture prices. May I suggest using these: https://www.sv1afn.com/en/products/-22.html There is a lot of other goodies on his website, and I have found

Dave, Where did you find the very large alligator clip shown in the photos in the document? My usual sources aren't turning up anything big enough to bite a bnc connector. Just curious. Andy

Alligator clips are OK if you just want to get a rough idea of the impedance of the device you are measuring. The problem with them is you have an impedance discontinuity from the coax to the clips

Something wrong with your S11 plot. It should be much better than that. Here is a re-post of my previous plot. S11 is flat but is off by 3 to 4%. Note that S21 is much better estimate at low

Hi Roger Here my plots of S11 and S21 measurement of the 4.63Kohm leaded resistor at same time , same graphe , same scale they are dramatically differents , and I prefer the S21 obviosly . May be i am