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Never mind - just click on the "Read-Only" button to open the presentation

Why is it password protected ?

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. * /Smith-Chart Intro_2016_en_pwd.zip (

Here is another good reference from Fritz Dellsperger, Professor for RF and Microwave Engineering (HB9AJY ) at Bern University of Applied Sciences from 1992 to 2012, now retired

RG8X (foam dielectric) has Vp of 0.79 and loss at 7.2 MHz of 0.75 dB per 100 feet. Electrical wavelength length of RG8X @ 7.2 MHz is 107.9 feet. One trip around the Smith chart is half wavelength so

Hi I am new to this group and this topic is kind of old but maybe the problem is still there. I had the same issue and I got it working in this way: open file setup.py and, at the end, replace

Jeff, Of course the antenna is not 50 Ohms. No antenna is 50 Ohms across the whole band or bands. Like I said, the coax just rotates the antenna impedance around the Smith Chart. While you can't

Hi Jeff If you use the NanoVNA-Saver and do a proper calibration then you just measure at the TX side and save the measurement to a s1p Touchstone file. Then download the ZPlots by AC6LA and open up

When I made mine.? I used some jumpers and a bnc-bnc barrel in the middle to make up for the bnc T (about the same length), calibrated with all that attached, then just changed the barrel to the BNC

Bill, I have not heard it discussed here, but I made a little 'jig' with a series 50 ohm carbon resistor sandwiched between a male and a female coaxial connector (made one for PL259/SO239 and

DISlord, Thank you so much. Jos Op 31-3-2020 om 21:23 schreef DiSlord:

Bill, What kind of stubs are you considering? Stubs for Z matching or simple 1/4 wave stubs for filtering or something else?

Yes, you disconnect the antenna from the cable and attach your calibration kit to the free end of the cable with the analyser at the shack end and do a single port calibration. Then reattach the

Knowing the coax type and length, you can use SimSmith to propagate the measurement back to the antenna feed point. I've offered so many emails to the SimSmith download site on this group that I'll

Thanks for replying. I thought the vector network analysis would be able to adapt to the cable properties to get an accurate measure of the load at the end of the feedline. Jeff

I make stubs on a standard bnc T f/m/f connector and use a f/f barrel in the design, the reason being is that in the field, a wonky system swr will electrically lengthen the stub and can be

You can only measure the actual antenna impedance remote from the antenna, with a 1/2 wavelenght of coax or feedline (x the velocity factor of the feedline), measured at a single frequency of

Carey, If the antenna is NOT 50 ohms (it's actually an offset multi-band dipole with a 4::1 balun transformer), or not resonant, I was thinking that the COAX would introduce some problems. They do use

For additional undestand how it work: You can use generator, set freq for example 20Mhz, set AM modulation 60% and freq 1kHz Output for example 100mV Connect to NanoVNA CH1 Set on NanoVNA center freq

DiSlord wrote: bandwidth N N - is number from 0 to 255 (not reccomend use values bigger then 99, possibly counter overflow) N+1 number of samples count passed in dsp One sample process give 1kHz