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I've found that occasionally, my NanoVNA (or, more properly, my NanoVNA + NanoVNA-Saver) doesn't come back with a reasonable length on the coax. Invariably, it has been that I inadvertently set a

Maybe you should have tried it first.? :-) Mike - M0MLM

Today I blundered myself, I put shame on myself, I disgraced myself, and I made a fool of myself (with the help of a dictionary) by trying to demonstrate a TDR measurement with the NANOVNA to some

There is nothing wrong with being an Appliance Operator, we need them to keep the ham population large enough to support the ARRL and to prevent the corporate interests from lobbying to abolish

Dear Bill, I am also a retired doctor, who started playing with electronics in 1960, got my theory pass towards amateur licence age 14, and decided to keep radio/electronics/vintage computing as a

if it *is* in real/imaginary form, then SWR = (SQRT(R^2+I^2)+1)/(SQRT(R^2+I^2-1)

Come to think of it Bill, I AM an appliance operator. But I still don’t understand all the complexities of our microwave, TV, electric range, refrigerator. I have to refer often to the manuals (and

Hi, I wonder where "dumbing down" and other insults come from. There are a lot of nice appliances available and they need appliance operators to get them on the air. I doubt there are two hams with

Hi Colin, Please, note that s2p file is in the "RI" format, your formula to compute SWR is not correct.?? "RI" means that one column (2nd column) shows the real part of S11, while the other column

Is it “dumbing down” or increasing complexity? Back in 1960 when I was first licensed I was young and had a much quicker brain and felt I understood tubes, transistors, and RF circuitry sufficient

I am sorry you have had such a bad time with these little devices. I have FOUR of them in different guises ( nano, V2, V2 with 3.2 screen, V2N) and they all work fine. It needs a lot of patience to

Hi Alezis, because of my weekend family activities, I just got here. Please, if the problem is still current, visit my web page where you will find an answer to the solution. I have v3.0 hardware from

Alezis, See message 15041 for information on the "clearconfig 1234" command sent with a terminal program. I have never needed to do this, so I don't know what all it may affect. A search of the

John, how can this be fixed when readings are way out ? Thanks for your reply !

Hello Chris, Yupper, I will be sending it back after Sally blows thru! I also have the 4170D which I love. Also have HP-8712ES and 8711, one can never have too many VNA's lol TNX for ur reply, 73

Hi all, In my previous post i wrote ' sqrt (1- CR*2/L) in the denominator’, this should have been numerator. 73 John M0JBA

With some more research I managed to create a formula to show swr in a SNP spread sheet. SWR = (MA+1)/(1-MA) Where MA (or RI) is the second colomn in the spread sheet. for instance SWR = (B3+1)/(1-B3)

Hello Vidas, Monday, September 14, 2020 Exact same problem with one from a UK seller, rather than mess with it I sent it back. Ebay supplied a link to print the return label from, which I did and I

The dumbing down of ham radio has been going on for a long time.

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