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Friday
I will be at the Baylands starting with lunch. Hiroki AH6CY
By Hiroki Kato · #10180 ·
Re: saving measurements from nanoVNA
A nanoVNA has a USB serial port. ?You can type commands into its serial interface to make the nanoVNA dump the frequency and IQ data from the last scan as plain text. ?See:
By Ron, N6YWU · #10179 ·
Re: saving measurements from nanoVNA
Upon reflection, maybe this message will be more helpful.?? The nanoVNA is quite a complex thing capable of doing many things.? Navigating the menu of soft keys is not exactly intuitive, but it
By Paul AA6PZ · #10178 ·
Re: saving measurements from nanoVNA
We are in violent agreement. :-) I was just trying to show a bit more of the math. 73 [email protected]> wrote:
By Christopher AI6KG · #10177 ·
Re: saving measurements from nanoVNA
Actually it's easier than that. The VNA has the equations. The other day, I was looking at the impedance of something.? In the top center of the display was the number in Ohms at the marker
By Paul AA6PZ · #10176 ·
Re: saving measurements from nanoVNA
What AA6PZ said. In practical terms, find a frequency where the reactance is between 25 to 100 ohms, and do the math. To take the math a step further: Z = 50 ¦¸ . (1 + S11) / (1- S11). The real part
By Christopher AI6KG · #10175 ·
Re: saving measurements from nanoVNA
Paul, I? need more information.? ?I have a pair of alligator clips connected with rg174 to a sma connector.? ?I know how to calibrate that system.? ?What? settings do I set S11 to?? What am I
By Doug Hendricks · #10174 ·
Re: saving measurements from nanoVNA
Simple Use the nanoVNA to measure impedance. Take one of the following formulas and a little algebra to solve for C or L.
By Paul AA6PZ · #10173 ·
Re: saving measurements from nanoVNA
Christopher,? how do you measure capacitors and inductors with? a nano vna?
By Doug Hendricks · #10172 ·
Re: saving measurements from nanoVNA
There are some options here: https://nanovna.com/?page_id=141 I am keen on nanovna saver. In fact I rarely use a nanovna without it. It increases the effective resolution of a sweep, computes filter
By Christopher AI6KG · #10171 ·
saving measurements from nanoVNA
Many of you have used nanoVNA for antennas and other purposes.? Can anyone suggest how to save data to files on a computer? There are several apps that purport to do that, but I didn't rather not try
By Paul AA6PZ · #10170 ·
Re: Time change
Yes, the lines marking the time were different, except they would cross lines on your dial at the equinox when the days have 12 "modern" hours and 12 Roman hours. BTW, Did you have a way to adjust
By Paul AA6PZ · #10169 ·
Re: Time change
I get that they declared daylight time divided by 12 equated to an "hour" in Roman times.? But how could they have a sundial that would do that?? I had a sundial in my backyard for several years and
By Doug Hendricks · #10168 ·
Re: Time change
Here's what I think about all this rigamarole. We have it easier these days.
By Cliff Sojourner K6CLS · #10167 ·
Re: Time change
We live in a world with atomic clocks and other devices that tick at a very fixed rate. We just take that for granted. The Roman concept was to simply divide the day light time, what ever it was on
By Paul AA6PZ · #10166 ·
Re: Time change
Paul do you want to explain that last statement about the sun rising at 6 am and setting at 6 pm???
By Doug Hendricks · #10165 ·
Time change
Personally, I think day light savings time is a reasonable way to deal with the changing solar time.? In summer I wish for double DST because the sun is steaming in my window long before it is time
By Paul AA6PZ · #10164 ·
Re: Band pass filter
You have it right.? ?Remember Antenna to in, out to radio.? Enjoy
By Doug Hendricks · #10163 ·
Re: Band pass filter
I Doug, ?thank you so much for it. I went to lunch today and Dave gave it to me. He said you had some instructions on how to use it but that basically I had to make this string... antenna -> external
By Joy Rabins · #10162 ·
Band pass filter
Joy, have you been able to try thr band pass filter?? I am curious.? ?Doug
By Doug Hendricks · #10161 ·