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You have the impedance looking into the feedline from the transmitter end, but now you are asking what the antenna is doing. An arbitrary amount of feedline will rotate a point on the smith chart

Jim Lux, as usual, did a very credible explanation of what is going on - far better than I could! Second order differential equations are the key to understanding. I'd like to add a practical point:

Thanks for the input so far. I should have mentioned that the antenna (total length 16 meter) was connected in the middle with a 20 meter long RG58 cable. The VNA was calibrated "standalone". This was

sometimes when I go to cal, some of the selections are already reversed video, ie as if they were selected. Does this matter? Should I just go thru with cal like normal or will these odd reverse

Hi, I did go back and look at what resonance *is*. The source this time was published in 1976 but has not changed from the more ancient texts I first read (early 50s). Jim has explained things in

With all this chatter about resonance (some of which I know won't hold water) I will have to go and look again. I have been working with resonance as being when inductive reactance and capacitive

yes, there are resonances at approximately any multiple of a half w

A couple of points. - You did not say how you connected your antenna to the NanoVNA. If you connected with a piece of coaxial cable and did NOT calibrate at the end of the cable you are NOT

For the sake of making an instruction for an antenna tuner I placed a dipole of length about 2 times 8 meters in my garden about 1 meter up from the ground. The idea was to get some not ideal values

You have very old firmware.? Try to install the latest from the ttrftech GitHub repo, calibrate the screen and then the RF and see if that fixes everything. FW for the H and older is all the same but

In order to show respect for the original developer, we mark the original developer information on the product. However, OwOCom recently released some instructions that it is not willing to support

On Mon, Sep 7, 2020 at 02:01 AM, Corneliu wrote: .. Designed by OwOCom. =================================== hugen was trying to properly credit OwOCom with the design of the original SAA-2 open

I received mine today. It looks great ! Designed by OwOCom.

1 - Your firmware not work vs NanoVNA-App (old, based on 0.6 version) 2 - On start sweep in NanoVNA-App - you can`t select menu (yes can, but all work slow), in this case nanoVNA 90% time answer on

Thanks Larry I try this based on your procedure at the wiki I used PuTTY (see attached pictures) However the issue remains. I wonder if there is a way to reset to factory default. Could reloading or

Where did you get the new firmware? Roger

Recalibrate the touchscreen.? On Sun, 6 Sep 2020 at 7:41 PM, Francisco Gonzalez<franciscoti5lx@...> wrote: Hello I just got a NanoVNA H. After I connected to the windows app the Menu

Yes, that does appear to be the case. I have a -H version and DFU'd the built-in firmware "1-of-11 H-LSI" and everything works well. The application's user interface makes DFU changes very easy via

When I go to calibrate sometimes some of the settings are already selected, "reverse videod". I suspect that when this happens that my calibration is not valid. What causes those settings to show up

Hello I just got a NanoVNA H. After I connected to the windows app the Menu doesnt work properly. Main menu shows up correctly but then you select any item the menu disapear. I meant the submenues