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Using formula 234/freq for a 1/4 wave vertical with 4 radials I was building gave me a wire length of 16 feet 6 and 1/8 inches. Nano vna gave swr of 2.3 (too high for my qrp station) so tried to find

`That's what I thought. Looked for a file, but no luck so far.

The NanoVNA doesn't have very good visibility into its internal state, i.e. the sweep range and other parameters. The software can send a sweep command to get the current sweep setup sweep – sets

If you have to rewind a transformer then you could just buy a core and completely build it... Why not just buy a different one that directly fits your needs?!? 73 sigi dg9bfc Am 25.07.2022 12:01

Using nvna-s 0.3.9. Why does nvna-s default to a sweep range of 1M to 100M when I connect to the device? I have set the cal range to 100k to 50.1M on the device itself. Where is the nvna-s default

I see the link is in his message.

Ed, Thanks for that link! Do you have a link to the entire work? Chuck Bland

Fran?ois, Greek letters are everywhere, in Physics, Maths, Medicine &c. &c. In English there is a fairly uniform pronunciation

Mini-circuits T1-1T-X65 https://www.ebay.co.uk/itm/402773717736?hash=item5dc72f32e8:g:UJAAAOSw1QRgZbWB Might be a fake, so might other items on ebay! Kind regards Ed, G8FAX

Hi Francois, It seems you want in EXCEL to separate out the real and imaginary parts of a COMPLEX number. You could use the functions IMREAL and IMAGINARY to do this. and then make use of the other

I was only able to find on the UK ebay the COILCRAFT TTWB1015 0,07MHz-225MHz Wideband RF Transformer 1 : 1.5 (

My "formula" are used to perform calculations in Excel; for example, to calculate 'L' adapters. The algebraic form is easier to copy, especially when you have to pay attention to cells with $. The

Hi Francois, Your development to conclusion appears correct. To be sure use some test values to check it. You might find an alternative approach less mathematically demanding: Addition and subtraction

Hello ** I agree gamma=S11 ** In effect If we use Z = Zo * (1+gamma) / (1-gamma) that means: Zo + Zo.gamma = Z - Z.gamma gamma.(Zo+Z) = Z - Zo gamma = (Z-Zo)/(Z+Zo) But the question was how to

Re comment: “But S11 is not the equivalent of gama.“ Indeed Gamma (a vector) is calculated by the quotient of (Zload-Zo)/(Zload+Zo) with Zload and Zo both complex numbers. The result Gamma of this

For Z2S and S2Z for S11 and S21 I made this one up. It might help a bit. https://pa3a.nl/wp-content/uploads/2022/07/Math-for-nanoVNA-S2Z-and-Z2S-Jul-2021.pdf 73 Arie

Two years ago I have built the enclosed spreadsheet in ODS format (Libre Office) for education purpose. Maybe it can helpful, and also be easily modified or adapted. Blue fields are input ones. The

Thanks Jim, I had forgotten about those converter functions. Anyone not familiar with Excel functions, "DEGREES" converts radians to degrees.. Kind regards Ed, G8FAX

I think I found where the error is. You wrote : ? The S1P files contains the real and imaginary parts of the reflection coefficient, Greek letter ‘gamma’. ? But S11 is not the equivalent of

I get the same answer you do 26.4+j 0.669 using Excel S11 -0.31048 0.011489 complex -0.31048+0.011489i 1+S11 0.68952+0.011489i 1-S11 1.31048-0.011489i divide 0.526041061787863+0.0133788274211592i *50