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On Wed, Mar 25, 2020 at 12:21 PM, Holger Müller wrote: Subject has arrived to me today. Hope I find some time to check and test it with NanoVNA-Saver soon.

Like a slide rule. Accurate enough to get useful results and visualize what's happening in a system. You can be much more accurate by using SimSmith. -- Art Greenberg WA2LLN art@...

Hi, $Subject has arrived to me today. Hope I find some time to check and test it with NanoVNA-Saver soon. ciao Holger (DG5DBH)

Smith Chart : In this computer era, this extremely high-effort demanding, highly-inaccurate, old-time graphics tool became completely obsolete, because it is a totally useless one in every other

Because I dropped a zero. :-) For example, the point 1.2 + j.7 is really 60 + j35 in a 50 Ohm system.

Why isn't the example = 60 + j35 ??? <snip>

The Smith Chart coordinates are normalized to the impedance of whatever system you are using. This is usually 50 Ohms so the 1.0 in the center of the chart is 50 Ohms resistance, 0 Ohms reactance. You

If you're interested in modifying/hacking/playing with several of the NanoVNA apps written in Python, there is an open-source area on Github with a complete intro on the subject:

There is no scale as such. The mathematics provides the translation from the rectangular Z coordinate system to polar and the result of that math transformation yields the curves your are referencing.

Yes but the gentleman wants to know about the scaling of those curves which are defined by the uniquely derived? equations as shown in the URL I posted. Gedas, W8BYA EN70 Gallery at http://w8bya.com

Actually, the Smith chart is "normalized" to whatever the impedance that you are working with, usually 50 but could be 75 or 450 if open wire feed line.The operation to compute is as John described,

Hi, The scale is neither linear nor logarithmic, and I’m not sure what it is. Luckily it does not matter if you just want to use the smith chart. Generally for radio work the centre is defined as 50

Not a math wiz here but one of the best ways I learned about the chart back in college was to see the mathematical calculations (and thus derivations) for the actual circles. The smith chart has

An off - topic question to any math wiz knowledgeable about Smith chart. There are oodles of stuff about Smith chart, but I have not be able to find WHAT is the actual scale of the coordinates. For

Thanks a ton guys! have some 50ohm for dummy loads I planned to build, will use and report.

Hi Larry, Thanks. I have one from the first batch, I am used to upgrade. And it's so easy to go into dfuse mode...

Newer FW versions add functionality and/or correct errors. Any FW version from the beginning of 2020 will do and they are easy to flash into the device.

Thanks, but sorry I did not get if you answered my question: best fw for nanovna-saver Cheers and thanks

Thank you it seems I am too late... Chris --- 'Everything should be made as simple as possible, but not simpler.' -- Albert Einstein Am 24.03.2020 um 11:23 schrieb CT2FZI:

On Tindie you can pay with Paypal. In my account I can use it for paying... Chris --- 'Everything should be made as simple as possible, but not simpler.' -- Albert Einstein Am 05.03.2020 um 21:27